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Dragons9-13.2
pp 427-434
| Question | Answer | |
|---|---|---|
| Describe the 3 ways of how heat energy can be transferred from hot objects. | Conduction, convection and electromagnetic waves | |
| This type of energy transfer takes place when 2 objects are in contact with uneven temperatures. | conduction | |
| This type of energy transfer involves the movement of the heated substances itself. | convection | |
| During convection, the fluid is either | a liquid or a gas | |
| Energy that is transferred as electromagnetic waves is called | radiation | |
| List 3 things that electromagnetic waves include. | infrared radiation, visible light and ultraviolet light | |
| Radiation doesn't involve the movement of | matter | |
| Because their particles are far apart and energy transfer is less, gases are _____ conductors. | poor | |
| Particles in liquids are ____ conductors. | poor | |
| Rubber and wood are ____ conductors. | poor | |
| A plastic spoon is a ____ conductor of heat. | poor | |
| A metal spoon is a ____ conductor of heat. | good | |
| This is a ratio and can be used to predict effects of larger temperature changes for masses other than 1 kg. | specific heat | |
| This is the transfer of energy as heat through a material | thermal conduction | |
| This is the movement of matter due to differences in density that are caused by temperature variations | convection | |
| This is the vertical movement of air currents due to temperature variations | convection current | |
| This is the energy that is transferred as electromagnetic waves, such as visible light and infrared waves | radiation | |
| What type of energy transfer is described when there is transfer of energy by electromagnetic waves? | radiation | |
| What type of energy transfer is described when there is transfer of energy between colliding particles? | conduction | |
| What type of energy transfer is described when there is transfer of energy by the movement of fluids? | convection | |
| Predict whether the hottest part of a room will be near the ceiling, in the center, or near the floor? | near the ceiling because hot air rises | |
| Explain why there are temperature differences on the moon's surface, even though there is no atmosphere present. | 2 factors: varying composition of the moon's surface and location of the spot (sun or shadow). | |
| Explain why cookies baked near the turned up edges of a cookie sheet receive more energy than those baked near the center. | Cookies near the edge also receive energy from air convection currents and radiation from the side. | |
| In general, liquids are ____ thermal conductors. | poor | |
| Molten or liquid metals are very ___ conductors. | good | |
| This is the quantity of heat required to raise a unit mass of homogeneous material 1K or 1 degree C in a specified way given constant pressure and volume | specific heat |
Created by:
JAnderson,PCHS
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