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- 1. Multiple ChoiceWhich of the following in 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.
- 2. Multiple ChoiceWhich is the best activity to help keep a home cool in the summer?Open the refrigerator often.Turn off the television, radios, and computers.Open the windows during the day.Open the shades where the sun is shining.
- 3. Multiple ChoiceIn a room in the wintertime, where would you find the warmest air?near the ceilingnear the floorin the cornersby a window
- 4. Multiple ChoiceWhat 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.
- 5. Multiple ChoiceWhy do you see your image in a mirror?Light is reflected.Light is refracted.Light is absorbed.Light is diffused.
- 6. Multiple ChoiceWhich of the following is an example of a light reflector?the planet Marslightningexploding fireworksstars
- 7. Multiple ChoiceWhy 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.
- 8. Multiple ChoiceWhat happens to a sound as the vibrations of an object increase in strength?The sound becomes louder.The sound becomes softer.The sound waves get further apart.The pitch of the sound is higher.
- 9. Multiple ChoiceBy what process does heat energy travel from the sun to Earth?Heat is radiated through space.Heat is conducted through air molecules.Convection of heat through air currents.Heat travels through the wind.
- 10. Multiple ChoiceWhat makes a hot air balloon rise? The particles of air in the balloondecrease 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.
- 11. Multiple ChoiceWhat happens to light when it passes through a translucent material such as waxed paper? Most of the lightpasses through.is reflected in a straight line.is absorbed and very little is reflected.is not allowed to pass through.
- 12. Multiple ChoiceWhy are curved mirrors used in car headlights?They make things look smaller.They make things look bigger.They focus light straight ahead.They spread light in many different directions.
- 13. Multiple ChoiceWhich of the following is an example of a light reflector?fluorescent lightfirefliesconcave mirrorcampfire
- 14. Multiple ChoiceWhat causes an echo?Sound waves are absorbed by an object.Sound waves are transmitted through an object.Sound waves are reflected off an object.Sound waves completely disappear.
- 15. Multiple Choice
What would happen if you increased the frequency of a sound wave?
The sound would get louder.
The sound would get softer.
The sound would be higher in pitch.
The sound could be lower in pitch.
- 16. Multiple Choice
What would happen if you increased the amplitude of a sound wave?
The sound would get louder.
The sound would get softer.
The sound would be higher.
The sound would be lower.
- 17. Multiple Choice
Allows only some light to pass through
translucent
transparent
medium
opaque
- 18. Multiple Choice
The bending of light waves as they pass from one material to another
reflection
opaque
refraction
echo
- 19. Multiple Choice
What is the angle of reflection?
50
45
55
40
- 20. Multiple Choice
Calculate the angle of Incidence
54
34
44
64
- 21. Multiple Choice
Why does the pencil appear bent?
Light rays travelling from parts of the pencil above the water bend away from the normal and appear closer to the horizontal surface, thus making the pencil appear broken.
Light rays travelling from parts of the pencil above the water bend towards from the normal and appear closer to the horizontal surface, thus making the pencil appear broken.
Light rays travelling from parts of the pencil under the water bend away from the normal and appear closer to the horizontal surface, thus making the pencil appear broken.
Light rays travelling from parts of the pencil under the water bend towards from the normal and appear closer to the horizontal surface, thus making the pencil appear broken.
- 22. Multiple ChoiceSound is an example of which type of wave?TransverseLongitudinalBothNeither
- 23. Multiple ChoiceLight is an example of which type of wave?TransverseLongitudinalBothNeither
- 24. Multiple ChoiceWhich wave is pictured?TransverseLongitudinalBothNeither
- 25. Multiple ChoiceHow many waves are in this picture?123.54
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