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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 ChoiceJet airplane taking off 160 decibels. (Damage to hearing)
Chain saw 110 decibels
Hair dryer 90 decibels (Annoying to hearing) Ringing telephone 80 decibels (Annoying to hearing) Normal conversation 60 (Acceptable to hearing)
Which of the following might damage hearing?hair dryerconversationsringing telephonechain saw - 10. Multiple ChoiceJet airplane taking off 160 decibels. (Damage to hearing)
Chain saw 110 decibels
Hair dryer 90 decibels (Annoying to hearing) Ringing telephone 80 decibels (Annoying to hearing) Normal conversation 60 (Acceptable to hearing)
Which of the following would be annoying but not damaging to hearing?whisper at 30 decibelsvacuum cleaner at 75 decibelspower lawn mower at 90 decibelsradio on high at 112 decibels - 11. Multiple ChoiceWhat would you do to lower the pitch on a violin?Pluck the string very lightly.Shorten the string.Loosen the string.Use a thinner string.
- 12. Multiple ChoiceWhat would you do to increase the intensity of the sound that a drum makes?Tap the drum harder.Loosen the drum head.Tighten the drum head.Make the drum head out of a thicker material.
- 13. 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.
- 14. 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.
- 15. 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.
- 16. 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.
- 17. Multiple ChoiceWhich of the following is an example of a light reflector?fluorescent lightfirefliesconcave mirrorcampfire
- 18. Multiple ChoiceWhich of the following would be most likely to cause hearing loss?burglar alarma dog shistlea jet taking offa symphony concert
- 19. 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.
- 20. Multiple ChoiceWhat would happen if you increased the frequency of a sound?The sound would get louder.The sound would get softer.The sound would be higher in pitch.The sound could be lower in pitch.
- 21. Multiple ChoiceWhat would happen if you increased the intensity of a sound?The sound would get louder.The sound would get softer.The sound would be higher.The sound would be lower.
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