Atmosphere

Earth's current atmosphere is

• 78% nitrogen, 21% oxygen, 0.9% argon and 0.037% carbon dioxide

• 78% oxygen, 21%nitrogen, 0.9% argon, 0.037% carbon dioxide

• 78% nitrogen, 21% argon, 1% oxygen

• 78% oxygen, 21% nitrogen, 1% carbon dioxide

The layers of the atmosphere in order from bottom to top are

• troposphere, stratosphere, mesosphere, thermosphere, exosphere

• troposphere, mesosphere, atmosphere, thermosphere

• mesosphere, thermosphere, troposphere, stratosphere, exosphere

• thermosphere, stratosphere, mesosphere, troposphere, exosphere

The layer of the atmosphere containing the ozone layer is

• troposphere

• stratosphere

• thermosphere

• mesosphere

The layer of the atmosphere containing our weather is

• thermosphere

• stratosphere

• troposphere

• mesosphere

The layer of the atmosphere where meteors burn up

• mesosphere

• thermosphere

• troposphere

• stratosphere

Where we live.

• stratosphere

• thermosphere

• troposphere

• mesosphere

What is the layer of the atmosphere in which meteors will burn up?

• Thermosphere

• Stratosphere

• Mesosphere

• Troposphere

When warm air rises and cools high in the atmosphere and then sinks to the earth creates _________ currents

• convection

• surface

• deep

• precipitaiton

A layer of air that surrounds Earth to keep us warm is called ...

• atmosphere

• Sun's rays

• ozone layer

• air pressure

The mixture of gases and particles that surrounds a planet, held by gravity is called what?

• greenhouse effect

• hydrosphere

• atmosphere