Science Unit 4 study guide

Choose the THREE gases in the atmosphere.

• Nitrogen

• Ammonia

• Argon

• Oxygen

What is Nitrogen's percentage in the atmosphere?

• .9%

• 16%

• 78%

• 21%

What is Oxygen's percentage in the atmosphere?

• 21%

• 16%

• 78%

• .9%

What is Argon's percentage in the atmoshphere?

• 21%

• 78%

• 16%

• .9%

List the layers of the atmosphere in order from CLOSEST to FARTHEST.

• Troposphere,

  Mesosphere,

  Stratosphere, Thermosphere, Exosphere

• Troposphere,

  Mesosphere,

  Thermosphere,

  Stratosphere, Exosphere

• Troposphere, Stratosphere, Mesosphere, Thermosphere, Exosphere

• Mesosphere,

  Thermosphere,

  Stratosphere,

  Exosphere,

  Troposphere

In which layer of the atmosphere would you find meteors being burned up?

• exosphere

• stratosphere

• troposhere

• mesosphere

In which layer of the atmoshphere would you find weather?

• troposphere

• mesosphere

• stratosphere

• exosphere

In which layer of the atmoshphere would you find the ozone layer?

• troposphere

• mesosphere

• stratosphere

• expsphere

In which layer of the atmoshphere would you find a high amount of helium and hydrogen?

• mesosphere

• exosphere

• troposphere

• stratosphere

Name 3 major events that scientists believe led to the formation of our current atmosphere.

• condensation of water vapor into oceans

• dissolving of carbon dioxide into oceans

• low pressure in the atmosphere

• algae and plants photosynthesizing to form ozygen