Science 8 Final Review

How have the sizes of the human population and the amount of carbon dioxide (CO2) in the atmosphere changed from 1960 to 1990?

• 1.  population has increased while the amount of CO2 has decreased.

•  population has decreased while the amount of CO2 has increased.

• Both the human population and the amount of CO2 have increased.

• Both the human population and the amount of CO2 have decreased.

Answer explanation

Both amounts are increasing based on the numbers in the chart.

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NGSS.MS-ESS3-4

Which human activity might explain the change in carbon dioxide levels shown in the table?

• 1. storing nuclear waste

• 1. collecting solar energy

• 1. using wind energy

• 1. burning fossil fuels

Answer explanation

Burning fuel is a chemical reaction that creates CO2 gas.

Tags

NGSS.MS-ESS3-4

Which energy source is renewable?

• 1. oil

• solar

• coal

• 1. natural gas

Answer explanation

The other 3 are limited resources called fossil fuels.

Earthquakes that occur on the ocean floor may produce tsunamis, which are large ocean waves that can flood coastal locations. Which location is most likely in the greatest danger from the tsunami.

• A

• B

• C

• D

Answer explanation

The darkest coastline is at C

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NGSS.MS-ESS3-2

The darkly shaded areas of the map represent regions with a high potential for earthquakes to occur. The major cause of most earthquakes is the movement of___

• 1. glacial ice due to unequal heating of Earth’s surface

• 1. shorelines due to faulting of rock layers on Earth’s crust

• 1. lithospheric plates due to convection cells in Earth’s mantle

• 1. continents due to increased greenhouse gases entering Earth’s atmosphere

Answer explanation

Lithospheric plates are always moving.

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NGSS.MS-ESS2-2

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Earth’s weather is primarily caused by the

• 1. uneven heating of Earth’s surface

• 1. drifting of Earth’s crustal plates

• 1. gravitational attraction of the moon

• 1. changing distance between Earth and the Sun

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NGSS.MS-ESS2-5

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The diagram below shows two symbols commonly found on a weather map.The symbols on this map represent ____

• 1. winds

• fronts

• latitude and longitude

• climate changes

Answer explanation

Warm and cold fronts

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NGSS.MS-ESS2-5

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Which weather event is shown on the map?

• 1. tornado

• 1. blizzard

• hurricane

• thunderstorm

Answer explanation

Hurricanes form over bodies of water.

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NGSS.MS-ESS2-5

Which material is being cycled?

• 1. carbon dioxide

• 1. nitrogen

• 1. oxygen 

• water

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NGSS.MS-ESS2-4

 On which date does North America usually experience the longest period of daylight?

• 1. March 21

• 1. September 21

• 1. June 21

• 1. December 21

Answer explanation

Summer starts June 21

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