read pages 106110. answer the following questions as your
TRANSCRIPT
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6.1: Absorbing and Losing Heat (pg 106 110)Read pages 106110.
Answer the following questions as your notes for this topic:
1) What is Heat Absorbtion?
2) What does specific heat capacity measure?
Heat absorption is how different materials absorb heat at different rates
Specific heat capacity measures a substance's ability to lose or absorb heat.
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3) How is specific heat capacity written? (what unit of measurement does it use?)
4) The specific heat capacity of water is 4.19. What does this mean in terms of raising the temperature of water?
Specific heat capacity is measured in Joules per gram degrees Celsius. Or J/g oC
This means it takes 4.19 J of energy to raise the temperature of 1 g of water by 1oC.
5) Between sand and water, which substance takes more energy to increase the temperature?
6) What are the specific heat capacities of water and sand?
7) In general, the lower the specific heat capacity, the FASTER the substance can change temperature. ( Faster or Slower)
8) Name a metal with a specific heat capacity of less than 0.5
Water requires more energy because it has a higher specific heat capacity.
Water: 4.19 Sand: 0.66
Iron : 0.45 Copper: 0.38
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9) Which would take more energy to increase its temperature by 10oC? Explain why.
a) a beaker with 500mL of sand
b) a beaker with 500mL of water
10) To make french fries, it is best to use oil that is very hot. Should you use an oil with a higher or lower specific heat capacity? Explain.
The beaker with water would require more energy because it has a greater specific heat capacity.
A higher specific heat capacity oil would be better as it would heat up faster.
6.2: Keeping heat at home (pg111119)
Read pages 111119 and answer the following questions: 1) What is insulation? What is it used for?
2) What is an Rvalue?
Insulation is a material that slows the transfer of heat.
RValue is a measure of how well something insulates. A higher RValue means a substance is a better insulator.
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3) Which is a better insulator, an insulation with an Rvalue of 10, or an insulation with an Rvalue of 16?
4) What are two "weak points" when trying to keep heat in a house?
5) What gas is inside "double pane windows" to increase it's insulation value?
An RValue of 16 will insulate better.
Heat often tries to escape through doors and windows.
6) Name 3 ways a "vacuum bottle" or thermos works to keep the heat inside.
7) What are better insulators, metals or nonmetals? Which are better conductors?
Metals are poor insulators, but good conductors
NonMetals are good insulators, but poor conductors.
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6.3: Keeping Warm (or cool) pg 120125Insulation: The best insulation is..... _____
Materials that keep things warm are usually _______. This is to keep the _____ in place.
Sweat:Remember, a ______ body is a warm body.
In ch. 5 we learned about cooling by evaporation. This means that if our skin is wet, it will evaporate and _____________.
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Traditional Warm ClothesCaribou fur: Caribou hair is ________. This means it can trap _____________, providing awesome insulation.
Fur Hood: This ________ air in front of the wearers face. The air is warmed before you breathe it.
Condensation: In very cold temperatures, water vapour when you exhale can __________. This can freeze onto your clothes, face, or beard. Ice __________ to Wolverine, wolf, and other dog fur.
Seal skin is awesome for ________ because it is ____________.
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Keeping cool: Why do people living in very hot places wear think clothes???!
Intense Heat & Cold:FRC: _________________
These clothes ______ but do not burn.
This ________ material provides a layer of ________ to protect them from heat.
Fire fighters wear an __________ inner layer, which keeps moisture away, and keeps the wearer cool.