What is the first layer of the atmosphere? (the one we live in)

• Troposphere
• Stratosphere
• Thermosphere

How is the surface of the Earth heated?

• Conduction
• Convection
• None of the above

Which layer of the atmosphere contains the ozone layer?

• Troposphere
• Thermosphere
• Mesosphere
• Stratosphere

What causes the Earth's seasons?

• Tilt of the Earth
• Tilt of Earth and location of Earth in relation to the sun
• How close the Earth is to the sun

When is it winter in the Northern Hemisphere?

• June 21
• September 22
• December 21

When is it winter in the southern hemisphere?

• June 21
• September 22
• December 21

How long does it take Earth to go around the sun?

• 24 hours
• 365 years
• 365 days

How long does it take the Earth to rotate once on its axis?

• 24 hours
• 365 years
• 365 days

What season is it in the Northern Hemisphere?

• Summer
• Winter
• Fall
• Spring

What season is it in the southern hemisphere?

• Summer
• Winter
• Spring
• Fall