1. What would be the best material to separate heat from cold?

Steel
Aluminum
Wood
Glass

2. Which of the following is an example of heat conduction?

An air vent from a furnace sending hot air into the house
A metal cup heating up when hot water is poured into it
The sun melting the ice formed on a frosty lawn
Cool air sinking to the ground on a cold night

3. By what process does heat energy travel from the sun to the earth?

Heat is radiated through space
Heat is conducted through air molecules
Convection of heat through air currents
Protozoa have flagella and algae do not

4. In a room in the wintertime, where would you find the warmest air?

in the corners
by a window
near the ceiling
near the floor

5. What makes a hot air balloon rise? The particles of air in the balloon

decrease in size and make the balloon lighter than air
increase in size and make the balloon lighter than air
are farther apart and make the balloon lighter than air
are closer together and make the balloon lighter than air

6. Which is the best activity to keep a home cool in the summer?

Open the refrigerator often
Turn off the television, radios, and computers
Open the windows during the day
Close the shades when the sun is shining