G7 MX8 Review 2

78% of the Earth's atmosphere is ___________ and 21% of the Earth's atmosphere is _____________.

• Oxygen, Nitrogen

• Nitrogen, Oxygen

• Nitrogen, Carbon Dioxide

• Oxygen, Carbon Dioxide

In what layer of the atmosphere do all weather events occur?

• Stratosphere

• Exosphere

• Mesosphere

• Troposphere

In the troposphere, the temperature _____ as altitude increases.

• Increases

• Decreases

• Stays the same

• Goes up and down

Why is the ozone layer vital to life on Earth?

• Planes fly in the ozone layer

• It is made up of oxygen (O₂)

• It shields the Earth from ultraviolet (UV) rays from the sun

• It causes clouds to be created

In which layer of the atmosphere do meteors burn up?

• Troposphere

• Mesosphere

• Thermosphere

• Exosphere

This layer is the hottest layer of the atmosphere?

• Troposphere

• Stratosphere

• Mesosphere

• Thermosphere

This layer is the outermost layer of the atmosphere. Satellites orbit the atmosphere in this layer.

• Exosphere

• Mesosphere

• Thermosphere

• Ozone Layer

What is the order of the layers of the atmosphere, starting with the layer closest to Earth's surface?

• Stratosphere, Troposphere, Exosphere, Mesosphere, Thermosphere

• Troposphere, Stratosphere, Mesosphere, Thermosphere, Exosphere

• Troposphere, Stratosphere, Mesosphere, Exosphere, Thermosphere

• Troposphere, Stratosphere, Thermosphere, Exosphere, Mesosphere

What absorbs ultraviolet rays in the atmosphere?

• troposphere
• stratosphere
• ozone layer
• greenhouse gases

What are the two most common gases in the atmosphere?

• Nitrogen and oxygen

• Oxygen and carbon dioxide

• Carbon Dioxide and methane

• Nitrogen and carbon dioxide