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

7. A prism breaks white light down into?

Shades of pink and gold
Yellow and red
The colors of the rainbow
Dark blue

8. What happens to light when it passes through a translucent material such as waxed paper? Most of the light

passes through
is reflected in a straight line
is absorbed and very little is reflected
is not allowed to pass through

9. Why do you see your image in a mirror?

light is reflected
light is refracted
light is absorbed
light is diffused

10. Brian is wearing a red t-shirt. Why does it appear red?

All colors of the spectrum combine to form red
Blue and green waves are bounced off the shirt
The red waves of the visible spectrum are absorbed
The red in the visible spectrum is reflected

11. What happens to the light particles when light hits an uneven surface?

They are reflected off in a straight line
They are scattered in many directions
They are absorbed by the surface
They pass through the surface

12. Why is the moon classified as a light reflector instead of a light producer?

The moon makes its own light from energy within it
The moon is visible because light from the sun bounces off of it
The moon is not visible from earth during the new moon phase
The moon glows from radiant energy below its surface

13. The longer a guitar string is, the _______ the pitch (vibration speed) it produces.

higher
louder
softer
lower

14. Sound travels _______ through denser material.

slower
independently
roughly
faster

15. The faster the sound wave the higher the?

volume
pitch
elevation
decibels

16. How does an object like a tuning fork transmit sound energy?

By the vibration of air molecules
By the metal molecules changing form
By the development of metal molecules
By the vibration of electricity

17. What is one way light and sound differ?

Light can travel in outer space, but sound cannot.
Sound waves are regular, but light waves are not.
Light produces energy only when reflected; sound only when generated.
Sound does not exist unless someone hears it; light exists everywhere.

18. What is one thing scientists have learned by studying the behavior of dolphins and their echo-location ability.

How underwater sound navigation is possible
How dolphins affect other kinds of animals
How dolphins depend on light to survive
How underwater sea life depends on oxygen