Earth's 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 containing the ionosphere and auroras is _?_.

• troposphere
• mesosphere
• stratosphere
• thermosphere

The layer of the atmosphere where meteors burn up _?_.

• mesosphere
• thermosphere
• troposphere
• stratosphere

The layers of the atmosphere that get colder as altitude increases are _?_.

• thermosphere and troposphere
• mesosphere and troposphere
• stratosphere and thermosphere
• thermosphere and mesosphere

The layers of the atmosphere that get hotter with increased altitude are the _?_.

• thermosphere and mesosphere
• troposphere and mesosphere
• thermosphere and stratosphere
• stratosphere and mesosphere

The hottest layer from the provided choices is the _?_.

• thermosphere

• stratosphere

• mesosphere

• troposphere

The troposphere gets colder as you go up.  What is the reason for this?

• The troposphere is heated by the sun. reacting with oxygen (ozone)
• The troposphere is heated by Earth's surface.
• The troposphere is heated by carbon dioxide heat release.
• It is getting closer to outer-space.