Structure and Composition of the Atmosphere

Question 1

Fill in the blanks to complete the sentences about why Earth’s atmosphere is important to living things.

Revolt · Accepted Answer

✔ oxygen; Earth’s atmosphere provides that animals need to breathe.: oxygen; The atmosphere keeps Earth warm, allowing to exist as a liquid.: water; Earth’s atmosphere filters out harmful radiation from the .: Sun

Question 2

oxygen✔ watercarbon dioxide

Revolt · Accepted Answer

✔ water

Question 3

✔ Sunground moon

Revolt · Accepted Answer

✔ Sun

Question 4

Which statements correctly describe the properties of air? Select three options.Air has mass but no weight.Air pressure is created by the weight of the atmosphere pushing on Earth’s surface.Pressure is a measure of how tightly molecules are packed.Denser air is heavier than less dense air.Air is less dense at higher altitudes.

Revolt · Accepted Answer

Air pressure is created by the weight of the atmosphere pushing on Earth’s surface.; Denser air is heavier than less dense air.; Air is less dense at higher altitudes.

Question 5

Which image shows the place where the pressure and density of the atmosphere would be lowest?

Revolt · Accepted Answer

[Image: Mountains covered with snow....]

Question 6

On a warm summer day, a severe storm happens, and a tornado forms.Which layer of the atmosphere is experiencing this storm?

Revolt · Accepted Answer

troposphere

Question 7

During an evening hike, you see a shooting star just like the one pictured here.In which layer of the atmosphere does this shooting star occur?

Revolt · Accepted Answer

mesosphere

Question 8

One evening, you see the northern lights, which are shown in the image.In which layer of the atmosphere do the northern lights occur?

Revolt · Accepted Answer

thermosphere

Question 9

Use the drop-down menus to complete each sentence about the layers of the atmosphere.

Revolt · Accepted Answer

✔ mesosphere; If the did not exist, Earth might be destroyed by chunks of rock from space.: mesosphere; The is located 12 to 50 kilometers from Earth’s surface.: stratosphere; Both the get colder as altitude increases.: mesosphere and troposphere; The ozone in the protects people from ultraviolet (UV) radiation.: stratosphere; The has the highest temperature of any layer in Earth’s atmosphere.: thermosphere

Question 10

mesosphere ✔ stratosphere ionosphere

Revolt · Accepted Answer

✔ stratosphere

Structure and Composition of the Atmosphere Answers

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