Thermal Energy

A barefoot student steps on a hot concrete surface. Most of the heat transferred to the student’s skin by this contact is by the process of:

• convection

• conduction

• radiation

• thermal energy tranfer

What is convection?

• Thermal energy transfer through direct contact

• Thermal energy transfer through the movement of fluids

• Thermal energy transfer through waves

• Thermal energy transfer through sunbathing outside

What is conduction?

• Thermal energy transfer through direct touch

• Thermal energy transfer through the movement of fluids

• Thermal energy transfer through waves

• Thermal energy transfer through drinking hot coffee

What is radiation?

• Thermal energy transfer through direct touch

• Thermal energy transfer through the movement of fluids

• Thermal energy transfer through waves

• touching the cookies out of the oven

How does heat travel?

• it doesn't travel

• from a hot object to a cold object

• from a cold object to a hot object

• all of the above

How do molecules at warm temperatures differ from molecules at cool temperatures?

• At warm temperatures, molecules move around more

• At warm temperatures, molecules move less

• At cool temperatures, molecules move around more

• At cool temperatures, molecules grow in size

What is the difference between heat and temperature?

• Temperature is an indicator of thermal energy and heat is the transfer of it

• Temperature is measured by a thermometer, and heat is measured by a barometer

• Heat is the average thermal energy of an object and the temperature is the transfer of it

• Heat is caused by the sun and temperature is caused by conditions in the atmosphere

Why is there more thermal energy in an iceberg than in a pot of boiling water?

• a. The pot lets the heated molecules escape more easily

• b. Most icebergs are fairly warm to the touch

• c. Icebergs contain many more molecules than pots of water

• d. Water does not hold heat very well

All particles of matter are in constant:

• motion

• contact

• phases

• happiness

Moving particles have ___________ energy.

• thermal

• light

• potential

• heat