Intro to Earth Systems

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Question 1: Does the atmosphere protect the Earth from meteoroids?

• No

• Yes

Answer explanation

Yes. Many meteoroids are burned as meteors when they enter the atmosphere.

Are both plants and animals part of the biosphere?

• No

• Yes

Answer explanation

Yes. All living and recently died life forms are included.

Is frozen ice on a mountain top in the geosphere?

• No

• Yes

Answer explanation

No. All water, wherever it is located, is in the hydrosphere.

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Is the ocean floor part of the geosphere?

• No

• Yes

Answer explanation

Yes. All rocks, and land masses including floors of bodies of water.

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Are fish included in the hydrosphere?

• No

• Yes

Answer explanation

No. Only water (ice, liquid or vapor) is included. No living forms.

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Is more than 95% of the Earth’s water in oceans?

• No

• Yes

Answer explanation

Yes. 97% is in oceans.

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Is most of the Earth’s freshwater in lakes?

• No

• Yes

Answer explanation

No. Only 3% of the Earth’s water is freshwater, of which 2% is in glaciers. So ⅔ of freshwater is in glaciers.

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Does the magnetosphere protect the Earth?

• No

• Yes

Answer explanation

Yes. It helps deflect particles in the Sun’s solar wind.