Question

fill in the blanks with the correct words

1. heat always moves from ________ to ________ objects.
2. __________ is heat transfer through space.
3. putting ice water in a styrofoam cup keeps it cold because styrofoam is a thermal __________.
4. metal is a thermal __________ because it transfers energy quickly.
5. the hotter the object, the __________ the particles move.
6. eating ice cream cools your mouth through __________.
7. __________ is a measure of the amount of thermal energy.
8. a hot air balloon rises because hot air fills up the balloon. this heat transfer is __________.
9. putting a cold spoon in hot soup would transfer energy from the ________ to the ________.
10. __________ is the energy of motion.
11. a mitten keeps your hand warm because it is a good __________.
12. if an ice cube was placed in a mitten and another one on the counter, the one in/on the __________ would melt first.
13. you touch a hot stove. ouch! heat is transferred by __________.
14. you put your hand above the hot stove, the air is warm due to __________.
15. the upstairs in a house is usually warmer than downstairs. this is due to this type of heat transfer __________.
16. putting a cold spoon in hot soup transfers heat by __________.
17. on a hot day, the sand at the beach gets very hot. this is due to this type of heat transfer__________.
18. it is a warm 80 degree day. when you get into the 80 degree swimming pool it feels cold even though it is the same temperature as the air. this is because water is a __________ when compared to air.
19. __________ heat and cool quickly because they allow heat to pass easily through them.

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Explanation:

1. Heat transfer occurs from high - temperature (hot) to low - temperature (cold) objects based on the second law of thermodynamics.
2. Radiation is the heat transfer method that can occur through a vacuum or space.
3. Styrofoam is a thermal insulator which reduces heat transfer.
4. Metals are good thermal conductors as they transfer heat quickly.
5. Temperature is related to the average kinetic energy of particles; hotter objects have faster - moving particles.
6. Eating ice - cream cools the mouth through conduction as the cold ice - cream is in contact with the mouth.
7. Heat is a measure of the amount of thermal energy.
8. A hot air balloon rises due to convection as hot air is less dense than cold air.
9. When a cold spoon is in hot soup, energy is transferred from the hot soup to the cold spoon by conduction.
10. Kinetic energy is the energy of motion.
11. A mitten is a good thermal insulator, preventing heat transfer.
12. The ice cube on the counter would melt first as the counter is a better conductor of heat than the mitten.
13. Touching a hot stove transfers heat by conduction.
14. Putting a hand above a hot stove warms the air due to radiation.
15. Upstairs in a house is usually warmer due to convection as hot air rises.
16. Putting a cold spoon in hot soup transfers heat by conduction.
17. Sand at the beach gets hot due to radiation from the sun.
18. Water feels cold at the same temperature as air because water is a better conductor of heat.
19. Materials that allow heat to pass easily are called thermal conductors.

Answer:

1. hot; cold
2. Radiation
3. insulator
4. conductor
5. faster
6. conduction
7. Heat
8. convection
9. hot soup; cold spoon
10. Kinetic energy
11. thermal insulator
12. counter
13. conduction
14. radiation
15. convection
16. conduction
17. radiation
18. better conductor
19. Thermal conductors