Science Quiz

When stratospheric ozone levels are reduced, the amount of ultraviolet radiation hitting Earth increases. Ozone depletion is most often caused

• by the reversal of the magnetic field of Earth.

• when fluorocarbons are released into the atmosphere.

• when electromagnetic waves from the Sun increase.

• by abrupt changes in weather and climate patterns.

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How do levees help prevent a river from flooding towns?

• Levees make the river wider.

• Levees make the river narrower.

• Levees make the riverbanks taller.

• Levees make the riverbanks shorter.

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NGSS.MS-ETS1-1

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During a heavy rain, water collects behind a flood control dam. What happens to the collected water?

• The water is all used for drinking.

• The water is hauled away by trucks.

• The water is held until it all evaporates.

• The water is slowly released to the watershed.

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In 1903 Mary Anderson invented the first windshield wiper. How did this invention most likely help people?

• It helped people use less gas.

• It kept people from driving too fast.

• It made cars easier for people to buy.

• It made cars safer to drive in bad weather.

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NGSS.MS-ESS2-5

Scientists discovered that shining light rays of a certain wavelength on water can destroy the bacteria growing in it. How will this discovery most likely benefit people?

• People will drink more water because it will taste better.

• People will stay healthier because the drinking water will be safer.

• People will stay healthier because the water will have more nutrition.

• People will be stronger because the light will add energy to the water.

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