Earth's atmosphere

What is the most abundant element in the Earth's atmosphere?

• Argon.

• Carbon dioxide.

• Nitrogen.

• Oxygen.

What is the correct order of Earth's atmospheric layers from bottom to top?

• Stratosphere, Mesosphere, Troposphere, Thermosphere, Exosphere.

• Troposphere, Mesosphere, Stratosphere, Thermosphere, Exosphere.

• Troposphere, Stratosphere, Mesosphere, Thermosphere, Exosphere.

• Stratosphere, Troposphere, Mesosphere, Thermosphere, Exosphere.

Which layer of the atmosphere has the highest density of gas molecules?

• Exosphere.

• Mesosphere.

• Thermosphere.

• Troposphere.

Which layer of the atmosphere contains the ozone layer?

• Stratosphere.

• Thermosphere.

• Mesosphere.

• Exosphere.

In which layer do virtually all weather phenomena take place?

• Troposphere.

• Stratosphere.

• Thermosphere.

• Mesosphere.

In which layer do auroras (e.g. northern lights) occur?

• Troposphere.

• Stratosphere.

• Thermosphere.

• Mesosphere.

Which two atmospheric layers have temperature profiles that promote convection ^{(movement in a gas or liquid in which the warmer parts move up and the cooler parts move down)}

• Mesosphere and Thermosphere.

• Mesosphere and Troposphere.

• Stratosphere and Thermosphere.

• Stratosphere and Troposphere.

What frequencies of electromagnetic radiation are absorbed by the earth's ozone layer?

• Microwaves.

• Infrared light.

• Radio waves.

• Ultraviolet light

What frequencies of electromagnetic radiation are most abundantly emitted by the sun?

• Infrared light.

• Visible light.

• Ultraviolet light.

• Radio waves.

What frequencies of electromagnetic radiation are most abundantly emitted by the earth?

• Infrared light.

• Ultraviolet light.

• Radio waves.

• Microwaves.