Question

concept review: thermal energy
match the following words with the correct definition

1. conduction

a. heat is circulated through a fluid, like air or water

1. convection

b. transfer of heat between objects that are not touching

1. radiation

c. heat moving through an object (touching)
answer the following questions

1. you have a pot of soup on the stove heating up. is that conduction, convection, or radiation?
2. you feel the heat of the iron on your hand as you hover your hand above the iron. is that conduction, convection, or radiation?
3. the liquid of the soup is circulating the heat inside the pot. is that conduction, convection, or radiation?
4. you accidently touch the stove and feel the heat. is that conduction, convection, or radiation?
5. the heat is circulating in the water vapor above the soup pot. is that conduction, convection, or radiation?
6. you feel the warmth of the sun on your skin. is that conduction, convection, or radiation?
7. what is kinetic energy?
8. what is temperature?
9. what has a higher temperature a water bottle in the fridge, or a water bottle on the kitchen table?

Explanation:

• Conduction: Heat transfer through direct contact.
• Convection: Heat transfer through fluid (liquid or gas) circulation.
• Radiation: Heat transfer through electromagnetic waves (no medium needed).
• Kinetic energy: Energy of motion.
• Temperature: Measure of average kinetic energy of particles.

Answer:

1. C
2. A
3. B
4. Conduction (stove to pot)
5. Radiation (heat from iron via waves)
6. Convection (soup liquid circulation)
7. Conduction (skin - stove contact)
8. Convection (water vapor circulation)
9. Radiation (sun's heat via space)
10. Energy of motion
11. Measure of average kinetic energy of particles
12. Water bottle on kitchen table (fridge cools, table is warmer environment)