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 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 most abundant gas in Earth's atmosphere is what?

• Oxygen

• Nitrogen

• Troposphere

• Helium

What gas makes up 21% of Earth's Atmosphere?

• Nitrogen

• Oxygen

• Ozone

• None of the Above

What do the wind speeds need to reach for a storm to be classified as a hurricane

• 39 mph

• 74 mph

• 105 mph

• 200 mph

What fuels a hurricane's strength?

• Wind

• Warm Water

• Sunlight

• Cold Water