Tuesday, January 5, 2010

Week #2 January 11-17

Please use this space to share your reflections of our learnings this week. What are the concepts that we discussed? What are the important vocabulary words that you learned? Are there any topics that we have covered that you are still unsure of?

113 comments:

  1. when you were talking about the sand being hotter than the water I already know about that because I've been to the beach lots of time but I did not know about how to sovl the eqation that you show us in class

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  2. i wasent sure about all of the vocabulary words that we had to learned because all of them had "polar" in them. so some of them were a little bit hard to remember, but the best thing i learned was definately that new formula and how to solve scientic problems with it.

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  3. Im not sure about the lab when the soap makes the water spread out. Why does soap do that to water?

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  4. During class on Monday, January 11th, we discussed why sand gets hotter then water. The main reason why sand gets hotter then water, is because of specific heat capacity. Specific heat capacity is the amount of heat needed to raise the temperature of 1 gram of a substance by 1 degree Celsius. Which has a higher specific heat capacity, water or sand?

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  5. Its cool to learn how water tension allows water to bounce on its self.It is always is crazy to figure out what you see when you slow a video down. Water tension allows many things on earth to happen, that we do everyday.

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  6. I thought that video of the water droplet dropping into the bath of water (in slow motion) was very neat! I liked the application to the real world about surface tension and running into it every day.

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  7. I enjoyed watching the two videos about the lizard running on water and the slow motion water droplet. I do a lot of waterskiing and boating and it made me think about surface tension. Is surface tension the reason you can waterski and why a boat will float? It seems like that would be right, but I'm not sure. If someone knows for certain the answer, I'd be interested to learn.

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  8. During class when we had to put the water drops on the penny I had know about the experiment before. But I didn't know that so much water could be held on a single small area. it taught me a lot about how strong the bond is between water molecules. I was very impressed with the results of 64 water drops on a single penny.

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  9. Yesterday in class we discussed why the sand is hottter than the ocean, even though the ocean is darker than the sand. I didn't understand how that was possible but now i understand it a little bit more and thought it was an interesting discussion.

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  10. So far, we have talked about specific heat capacity. When I just have the cut and dry version of the stuff like "Here's the numbers, here's the formula, figure it out" I'm good. But, when it's in context, I have a tougher time. I'm sure as the week goes on it will start making more and more sense to me, though.

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  11. So far we talked about the specific heat of objects and in lab we tested the specific heat of brass and aluminum. We also started to do the vocabulary on the Moodle. We also did a worksheet in class to help us with the equasion and extra practice.

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  12. So far in science I’ve learned that metal heats up faster than water and that water has a high heat compactly. I also thought the video that Mr. Boyce showed us about the water being dropped into a bigger tub of water was cool because I didn’t know water didn’t all go into the water at one time.

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  13. This week we talked about specific heat capacity and heat enertgy and how that all works. One thing I don't get is the way the formula really works. I thought the video you showed us was really cool about that math professor guy and the water.

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  14. So far this week the main thing that we have learned is specific heat capacity and how to solve those equations.

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  15. This week during class we tried to put as many drops of water as we could on a penny. I remember doing this last year in science but I didn't understand why until recently this week. I was wondering if this is why we can surf and water ski. I would be interested to find out.

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  16. This week, we learned about specific heat capacity. At first, I had trouble with the equations, but now I get it. Doesn't this also tie in to sea breezes and weather patterns because, the different heats create different densities?

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  17. Putting water drops on a penny helped me understand how water behaves. Learning about cohesion, adhesion, surface tension, etc. really showed how water interacts with other things in the environment.

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  18. In class this week we have learned about specific heat of water and such. I learned how to use the formulas in situations that are needed for it.

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  19. In science this week we learned about specific heat of water, surface tension, and the molecular structure of water. I thought the Jesus lizard video was interesting and it demonstrated the idea of surface tension well. The lab this week I thought was a good way to help us understand heat capacity because the piece of metal we used on our first trial turned out not to be actual aluminum, so our results were way off. On our second trial we used a different piece of metal that was aluminum and got much closer results. The mistake showed how different substances heat up using different amounts of energy at different rates, and allowed us to see how that works.

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  21. So this week we talked about specific heat capacity and heat energy. In class on Wednesday when we were doing the equation Q=(Cp)(m)(delta t) worksheet thing i was so confused! And then i had lab today and i think it helped me understand the problem better having like a real life example kind of thing not just made up numbers. I guess I'm a visual learner because lab really helped me understand the problem and it was pretty cool.

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  22. During class an Monday, I learned that a droplet of water will bounce off the surface of water do to surface tension. The droplet will then keep bouncing off the surface until it is small enough and then it just becomes a part of the surrounding water. Water has a fairly high surface tension which allows other substances like starch to float on top without imediatly sinking.

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  23. this week we talked about how salutes dissolve in solvents if they are both polar

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  24. During class on Monday, Mr. Boyce gave an explanation that helped me understand the concept of heat capacity and why we need to know what it is. The explanation was when your on a towel at the beach and you want to get to the ocean, but every time you step off of the towel the sand burns your feet. When you finally get to the ocean the water is a lot colder than the sand. This is an example of heat capacity, or how much energy (heat) it takes to make a material heat up by one degree. So that's what helped me understand the concept better.

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  25. This week ive learned about the specific heat capacity of water. We learned the by experimenting with two metals and finding their heat capacity. WE learned some new equations aswell.

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  26. In lab this week I didn't really understand what we where doing until the end of the lab but when I understood how we were measuring the heat transfer and specfic heat of the metal and water it made sense with what we were learning in class. I thought the equations were also very confusinng on monday but now I understand how to calclate specific heat perfectly!

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  27. During class we learned how to find the specific heat capacity of metals and water, and the formula for measuring it. To honest though, I didn't understand it very well untill the homework, but now I understand perfectly.

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  28. I thought this week in science was very cool because now we can find the amount of energy it takes for and object to heat up. This also explains to us why and how water heats up slower than other materials.

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  29. This week we experimented with surface tension on pennies, but I’m confused on two topics. Why does water have a density of 0? Why not use something like milk or juice for the experiments?

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  30. I liked the sand and water analogy. It really cleared things up for me and it showed how much heat water can hold compared to sand or concrete. Water is a very interesting molecule and the last 2 weeks we have learned a lot of interesting things about it.

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  31. This week we learned about adheisve and cohesion. Which is how molecules bond with one another and other molecules. We also learned how to find the specfic heat capicaty. We also learned some new equations.

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  32. This week we learned alot about specific heat capacity. The amount of heat needed to raise the temp. of 1 gram of a substance by 1 degrees Celsius is specific heat capacity. It's basically the specific heat of a substance. We used the formula of heat (which is energy transferred into a heated substance)*the specific heat of a substance*mass of the heated substance*change in temp. of the heated substance.

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  33. This week we learned about specific heat capacity. I learned that water heats up slower because it has a higher heat capacity than other things like sand. The problems we did on Wednesday helped because we had more practice with them and that is the way I remember equations.

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  34. In this weeks classes, we learned about specific heat capacity, and how to solve the equation to find it. As said above, the equations are pretty simple, but when you put them in context, it makes it a little harder. I personally liked this weeks lab, it was very easy to understand, and we had plenty of time to complete what was necissary.

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  35. This week we learned about spacific heat capasity and its formula. Q=CpM(delta)T,
    or,the amout of energy= (spacific heat capasity)(mass)(change in temprature)

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  36. This week we learned about specific heat capacity and how to solve for it. We also learned that water has a higher Cp (specific heat capacity) than most substances. Water's Cp is 4.18 and the equation to solve for Cp is
    Cp = heat lost/ mass(change in temperature).

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  37. The main subject that i learned this past week is specific heat capacity and how to calculate a substance specific heat. I also learned the definition of specific heat witch is the amount of heat needed to raise the temperature of 1 gram of a substance by 1 degree c. To calculate specific heat there are two different formulas one is Q=cpmdeltaT and the other is cp=Q/(m)(deltaT). I am feeling very confident with what i have learned this past week I now know how to properaly calculate specific heat capacity.

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  38. I was absent on monday, but im pretty sure i understand the concepts learned this week. I understand most of the vocab words we did on friday. This week we went over the specific heat capacity,and how to calculate it. And also how the sand on a beach gets hotter than the water.

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  40. This week we mostly talked about the specific heat capacity of items and how to calculate the specific heat capacity. The formula for specific heat capacity is Cp= Q/ M(delta) T
    another way to put it is Q= CpM(delta)T. The specific heat capacity is the amount of energy needed to raise the temperature of 1 gram of a substance by 1 degree. I am feeling very confident that I know everything.

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  41. This week we talked mainly about specific heat capacity and the formula for it.The definition for specific heat capacity is the amount of energy needed to raise the temperature of 1 gram of a substance by 1 degree; and the formula is Q= (Cp)(m)("delta" t).

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  42. This week in class, we talked about the specific heat capacity which is the amount of heat needed to raise the temperature of 1 gram of a substance by 1ºC. The formula to find the specific heat capacity is Q = Cpm∆T. Q, which is measured in Joules, is the energy transferred into a heated substance. Cp is the specific heat of a substance which is measured in Joules/gºC. m, which is measured in grams, is the mass of the heated substance. ∆T is the change in temperature of the heated substance which is measured in ºC. The specific heat capacity of water is 4.18 J/gºC, which is relatively high compared to other substances on Earth.

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  43. This week we talked about the specific heat capacity and recaped on water molecules and how they work. I liked the lab on specific heat capacity but I'm still confused why an object with a lower heat capacity would warm up faster than a surface with a higher heat capacity. Why isn't it the other way around?

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  44. This week we learned about specific heat capacity. We learned what specific heat capacity is and how to calculate it. I understand what the formula means and I can calculate it without trouble (usually).
    I agree with Nick Spencer. I do not completely understand how specific heat capacity works. Like Nick, I am confused that an object with a lower heat capacity would heat up faster than one with a high specific heat capacity. Other than that, I am not confused about anything we learned this week.

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  45. This week, I thought the videos of the lizard and the water droplet really explained surface tension to me. They showed that water has a stickiness that is caused by cohesive bonding. Also, I am still a little confused about specific heat capacity and how it is used.

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  46. This week we learned about surface tension, cohesion and adhesion. The best way I can describe cohesion and adhesion is that if they didn't exsist, when you put your hand in water then take it out your hand would be completely dry.

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  47. This week we learned about specific heat capacity and its equation Q=Cpm(delta)T. We learned that specific heat capacity is the amount of energy need to raise a gram of a substance one degree celcuis. We learned that waters specific heat capacity is 4.18. I am not confused about the topics we discussed.

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  48. This week we learned about specific heat capacity and its formula Q=Cpm(delta)T,surface tension- bonding of water molecules that results from the polarity of the water molecule,polarity- polar and non polar.We also learned about bonding- adhesive bonding and cohesive bonding, the best way to describe these two substances are that a adhesive bonding occurs between molecules that are different and cohesive bonding occurs between molecules that are the same.

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  49. I liked learning about surface tension, especially the slowed down video's. The "jesus" lizard was pretty interesting. Im wondering if it would be possible to learn or create special shoes to walk on water.

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  50. This week, we learned about specific heat capacity and how it works. We also talked about water’s specific heat capacity. We learned about why the sidewalk next to the pool burns your feet, but the pool is cool when you jump in. We also did a worksheet on the formula of specific heat capacity. From the beginning of this week to the end, I feel like I have learned so much! And I understand everything we went over.

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  51. In class this week we learned about surface tension, polarity and why sand heats up faster than water. We also learned about specific heat capacity of objects and substances.

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  52. well we've learned how sand heats up faster then water and then we learned specific heat capacity of different things.

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  53. This week we learned about adheisve and cohesion. Which is how molecules bond with one another and other molecules. We also learned how to find the specfic heat capicaty. Another thing that i thought was reall cool was finding how many dropletts can b held on a single penny!

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  54. I liked this weeks lab. I learned how to calculate specific heat capacity by putting the hot metal into cool water, and I thought it was interesting that i could calculate all that. I also liked the percent error and knowing how close i was to the accepted heat capacity of water.

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  55. I thought the water droplet video was very interesting and it was cool to find out why that happens, surface tension. I also liked the lab this week. I learned the specific heat capacity of water is 4.18. The percent error was interesting because i found out how close/ far away i was to the correct answer.

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  56. This week I learned about Specific Heat Capacity. At first I was confused about how it all worked. Now I understand it. We also talked about how the sand is hotter than the ocean. That was kind of confusing because the ocean is darker. But now i understand.

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  57. We started the week with a work sheet trying to figure out what the specific heat was and the heat joules (Q). When u were teaching us I no some people didn’t get it but I got everything u said so... good teaching this week Boyce

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  58. This week in lab was so confusing because I had done alot of the bottom of the lab, like finding the percent error was so confusing if you did the average experimental value wrong. But when I went back and fixed it, I found that I had a very small percent error, which was about 0.23%, compared to my other one which was 312%.

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  59. This week in class, i learned about surface tension and the reason why it lets certain things float and stay on top of water. this reminded of the video with the water dropplet because of how it was made of the same molecules but could still stay on the water.

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  60. This week we learned about polar and nonpolar molecules. We also discussed how to do our vocab words and moodle. I liked the experament that we did in lab this week. I think that the video we saw about the water drop was very cool.

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  61. This week was really helpful because I learned why water boiles so slow and I know that this connects to our last unit because energy cannot be created or destroyed. I also learned what water actually does when the droplets go into the water. The video was really cool.

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  62. This week i learned that surface tension is a "Sticky skin" and i dont really know hoe to explain that but it is like the penny experiment that we did in class where we put as many drops of water on a penny until the surface tension broke and the water went onto the desk. I didnt understand what the lab this week had to do with surface tension. The videos that we saw were really cool and the lizard running on water looked really weird but cool at the same time.

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  63. This week we learned about how to find the Specific Heat Capacity of an object, by using the formula. As well we learned about how water has a higher Specific Heat Capacity compared to metals, and that is why it heats up faster. At the time I'm not confused with any of the topics we covered so far.

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  64. In science last week, we learned about surface tension, polar and nonpolar molecules, specific heat capacity, and adhesive and cohesive bonding. I think that the lab was pretty easy to complete and I didn't have trouble doing the calculation, so it made it easier to understand how to figure out specific heat capacity. I thought it was really interesting when we watched the videos with the water dripping because it made it easier to understand when there is a visual like that.

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  66. This week, in science class, we learned a lot about specific heat capacity and built on topics learned last week, in class. We learned that specific heat capacity is the amount of energy needed from the sun to raise the temperature of a substance; more specifically, the amount of heat energy that a 1 gram substance needs to raise the temperature 1°C. It is why some substances are hotter than others even though they are both getting their energy from the sun. We also learned that water's specific heat capacity is higher than many substances. We practiced a lot with the equation Q(j)=cp(j/g°C)*m(g)*∆T(°C) and learned how to convert it to find the different parts of the equation in practice problems. In lab we did an experiment that involved finding the specific heat capacity of metals and transferring the heat of the metals to water and then finding its specific heat capacity.

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  67. last semester we already learned about the beach heating up quicker than the ocean due to equilibrium.

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  68. This week we talked about specific heat capacity and the effects it has on objects in our world. Some of the key words were specific heat capacity, heat, energy, mass, temperature, and calorimeter.

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  69. I have learned the power of surface tension and how a drop of water can bounce on top of the surface tension. some vocab i've learned is surface tension
    cohesive bonds.
    There are no topic that i am unsure of at this point.

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  70. On friday all we did was redoe our labs, and finish the vocab words that were given out to us. We also went over are labs

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  71. This week i learned about polarity and how polar things bond with polar things and non polar things bond with non polar things, I also learned what adhesive bonding occurs between molecules that are different and cohesive occurs between molecules that are the same. And personally i didn't know that Q=(Cp)(M)(DELTA(T))
    and That helps find heat difference and that Q/ (M)(delta)T)=Cp. I reallt liked how we used the heating of the water to discover the different temperature changes

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  72. During science this week our main concept that we learned was specific heat compacity. We learned how to solve for Cp and we learned other useful formulas that also come into play.

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  73. Last week we learned about specific heat capacity and how to calculate the SHC of an object. We used the equation Q = (Cp)(M)(Delta*T) to calculate the SHC of aluminum or brass.

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  74. This week we studied the causes and equations of specific heat capacity. We learned that to find the heat which is transfered into a substance, you have to multiply the specific heat of a substance by the mass of the heated substance by the change in temperature of the heated substance. More specifically, we were taught that the specific heat capacity of water is 4.18, much more than any other substance like a metal.

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  75. This week we learned about specific heat capacity. It is the amount of heat needed to raise a 1 gram object 1 degree Celsius. This means that an object with a lower specific heat capacity will heat up faster than an object with a higher specific heat capacity when both objects receive the same amount of heat.

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  76. This week we watched a video on water droplets, we did the penny experiment, learned a new equation, learned about SHC and how water is 4.18, we did some recycling, we had lab, we did some vocab. it all made sense.

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  77. the specific heat capacity kind of confused me at first, but now i understand it. i know what the formula means and how to solve it

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  78. This week in class I learned about specific heat. Specific heat is the energy need to raise 1 gram of something 1degree Celsius, specific heat is measured in joule/grams degrees Celsius. After the week I deffinetly understand how to do the specific heat calculations and what specific heat is.

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  79. This week in class we learned all about specific heat capacity and how to calculate it during lab and class time with the practice equations. I understand all of the vocab from this week and i grasped the concept of this week pretty well.

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  80. Over this week we learned about water molecules forming an outside layer that keeps things in and out. We also learned about heat capacity.

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  81. I liked the use of videos in class. The video of the water droplet bouncing was cool. You sould use things like that more often.

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  82. This week we learned about specific heat capacity witch is the amount of energy it takes to rais the temprature of one gram of an itam one degre celcus. We also learned about surface tension. The video was really cool

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  83. This week we learned how to solve the specific heat capacity problems. We also saw a video about surface tension of water that was really cool.

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  84. We learned that sand and metal both heat up faster than water. We also discussed different heat capacity's.

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  85. This week in lab we learned about different heat capacity's and saw what would heat up faster, a grain of salt or a metal. we also learned how to solve for Cp.

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  86. This week we learned about surface tension and how it allows water to bounce. We also learned more about heat capacity and in lab we tested how different objects can heat up faster giving them a lower specific heat capacity.

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  87. This week I learned about what specific heat capacity actually is. I found it interesting how various substances with different molecular structures heat at completely seperate paces under the same amount of sunlight.

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  88. In class this week we learned about specific heat capacity and how to solve the equations. We also learned about polarity and how polar oblects disolve other polar objects and non-polar disolve non-polar. Another thing was surface tension, which is what allows substances to float on water. I thought the video you showed was really cool.

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  89. This week in class we learned about specific heat capacity and how to determine all the variables. We also added another equation to our collection. Q=(Cp)(M)(deltaT). We also learnd aout polarity and how water spiders can float on water. We watched this really cool video too. It was about how water come together and how it bounces.

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  90. This week we learned about polar and non ploar molecules. We also learned an equation which is Q=(cp)(m)(deltaT) And we watched a really cool video that explains the surface tension of water

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  91. This week we learnedd how to calculate heat and then we learned what the equation was. WE also learned that sand can get hotter then water and why it heats up faster. The equation for finding the heat capacity is Q=(cp)(m)(deltaT) The reason why the sand heats up before water does is cause the sand can cunductthe heat, but whater has a salvent that alows it to take for time to heat up

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  92. This week we learned why water heats up slower than most substances. This is due to its cp or spacific heat capacity. Q=M*Cp*DELTAt.. Q= enrgy M= mass CP= specific heat capacity. DELTAt= change in heat.

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  93. We learned this week that the reason that the sand is always hotter than the beach even though they both receive the same amount of sunlight is that the specific heat capacity of water is less than water, meaning that water can hold more heat than sand.

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  94. This week in class we learned how water droplets can bounce of the surface of water because of surface tension. and we also learned how sand absorbes heat faster then water. so when you are at the beach and the saind is hotter then the water, its because the sand can absobe light and heat and keep it trapped in the sand

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  95. We learned about heat capacity, we learned why sand and gravel heat up fast. Water takes in the heat slowly and releases it slowly and sand and gravel take it in fast but release it fast.

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  96. This week in science i was absent all week except for lab. We simulated an aquifier which helped me more understand what it is and how it works. By adding water to the rocks we found the water table and found out that the large rocks have more porosity and therefore is a better aquifier.

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  97. it was cool in the video watching the water droplet bounce on the surface. we learned about surface tension, specific heat capacity and solving problems using this. ALso objects that heat up faster have a lower specific heat capacity.

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  98. Will Durant's quote "civilization exists by geological consent, subject to change without notice." describes that life for humans on the earth can be change or end without humans being able to do anything. Humans do not have control over the many natural disasters that happen globally. Haiti is an example of how humans do not have control over their life. The earthquake ended lives and drastically changed individual’s lives, destroying homes and cities.

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  99. This week we learned about surface tension. Surface tension is the cohesive bonding of water molecules that results from the polarity of the water molecles. Also in class this week we watched a video on how water bounces off the surface of the water and gets smaller and smaller.

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  100. This week we learned about specific heat capacity and surface tension. We learned that sand is hotter than the water due to specific heat. Water takes longer to heat up while sand takes a shorter amount of time.

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  101. this week i learned about specific heat capacity and how waters heatcapacity is 4.18 and specific heat capacity is how mutch heat something can take before its tempurature rises. i also learned about surface tention and water has a very strong surface tension cause we were able to get a tooth pick to float on the water.

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  102. This week we learned about specific heat capacity and how to find certian specific heat capacity of certian objects. We also learned about surface tension and how certian things can float on water beause of it.

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  103. This week I learned about specific heat capacity. I learned about polar objects. I learned about surface tension. And i learned why the sand heats up faster than water and that was pretty cool

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  104. Lexi Mercier per1
    This week we talked about specific heat capacity and the formula for it. Specific heat capacity is the amount of energy needed to raise the temperature of 1 gram of a substance by 1 degree. Metal dends to have a high specific heat capacity because it heats up really fast. The specific heat capacity for water is 4.18.

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  105. This week I learned aboutapecific heat capacity. I also learned how to couculate this, and find the heat capacity of basicly anything.Like water for instince, water's specific heat capacity is 4.18

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  106. specific heat capacity is the amount of energy it takes to heat something up. water has a very high heat capacity at 4.18. that means it takes longer and needs more energy to heat up.

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  107. This week we talked about specific heat capacity and the formula for it. Specific heat capacity is the amount of energy needed to raise the temperature of one gram of a substance by one degree. Metal dends to have a high specific heat capacity because it heats up really fast.

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  108. the main thing that we learnd this week was about specific heat. Spcific heat is when one mitaril can absorb more heat then another thing like water and sament water has a higher spcific heat then sament cause it can absorb more heat befor its temp will cahnge

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  109. i found it interesting that the sand heated up faster than the water because of there specific heat capacity

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