Thermal Energy

What is the original source of the most of the energy that people use?

• By radiation from the sun.

• By convection from the sun.

• By radiation from the Earth's core.

• Conduction from Earth's core.

Which best describes heat transfer by radiation?

• A slice of bacon frying in a pan.

• A pot on a stove boiling water.

• Cooking a hotdog in a microwave.

• A hot air balloon.

When particles are heated they begin to ____.

• move faster

• mover slower

• move up

• jump out of the pot

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
• vaporization
• radiation

A student opens the top window and the bottom window in a hot room. What statement best describes the heat transfer occurring in the room?

• conduction
• radiation
• convection
• evaporation

what is conduction?

• direct touch
• air or liquids
• heat waves/ light waves
• drinking hot coffee

what is convection

• direct touch
• air or liquids
• heat waves or light waves
• sunbathing outside

what is radiation?

• direct touch
• air or liquids
• heat waves/ light waves
• touching the cookies out of the oven

How does air travel?

• they don't travel
• hot to cold
• cold to hot
• All of the above

When do particles move faster?

• In hot water

• In cold water