Unit Test Answers

nitrogen✔ oxygencarbon dioxide

oxygen✔ watercarbon dioxide

✔ Sunground moon

thermosphere ✔ stratosphere troposphere

✔ thermosphere stratosphere troposphere

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.

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

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?

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

thermosphere stratosphere ✔ mesosphere

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

✔ nitrogen oxygen carbon dioxide

mesosphere ✔ stratosphere ionosphere

argon ✔ oxygen nitrogen

thermosphere and troposphere stratosphere and mesosphere ✔ mesosphere and troposphere

✔ argon oxygen nitrogen

argon ✔ carbon dioxide nitrogen

✔ small particles ice crystals gas molecules