Front

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

Back

Nitrogen, Oxygen

Front

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

Back

Troposphere

Front

In the troposphere, the temperature _____ as altitude increases.

Back

Decreases

Front

Why is the ozone layer vital to life on Earth?

Back

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

Front

This layer is the hottest layer of the atmosphere?

Back

Thermosphere

Front

What is the order of the layers of the atmosphere, starting with the layer closest to Earth's surface? Options: Troposphere, Stratosphere, Mesosphere, Thermosphere, Exosphere; Troposphere, Stratosphere, Mesosphere, Thermosphere, Exosphere; Troposphere, Stratosphere, Mesosphere, Exosphere, Thermosphere; Troposphere, Stratosphere, Thermosphere, Exosphere, Mesosphere

Back

Troposphere, Stratosphere, Mesosphere, Thermosphere, Exosphere

Front

What happens to temperature as we move from the crust down into the inner core?

Back

Increases

Front

Which layer is the coldest? Options: Troposphere, Stratosphere, Mesosphere, Thermosphere

Back

Mesosphere

Front

This process is caused through gravity, wind, glaciers, or rain.

Back

erosion

Front

The ozone layer is an actual hole. True or false?

Back

False