grade 7 quiz 3

in this layer, weather usually occurs

• ionosphere

• stratosphere

• mesosphere

• trophosphere

The weather layer of the atmosphere is ________.

• mesosphere

• stratosphere

• thermosphere

• troposphere

Contains the Ozone Layer.

• Troposphere

• Stratosphere

• Mesosphere

• Thermosphere

• All of the above.

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

________ is a region of highly ionized, or electrically charged, gases.

• mesosphere

• thermosphere

• troposphere

• stratosphere

What absorbs ultraviolet rays in the atmosphere?

• troposphere
• stratosphere
• ozone layer
• greenhouse gases

What are the vital roles of Earth’s atmosphere?

I. Creates meteors in the sky

II. Provides the oxygen that we breathe

III. Protects us from harmful UV radiation

IV. Helps regulate the temperature on Earth

• A. II and III only

• B. III and IV only

• C. I, II and III only

• D. II, III and IV only

What are the most abundant gases in Earth’s atmosphere?

• A. Nitrogen and Oxygen

• B. Nitrogen and Hydrogen

• C. Carbon Dioxide and Oxygen

• D. Carbon Dioxide and Nitrogen

It is layer of the atmosphere where meteors burn up.

• thermosphere

• mesosphere

• troposphere

• stratosphere

It separates the stratosphere from the mesosphere.

• mesopause

• tropopause

• stratopause

• none of the above