Unit 7 Quiz Review

The planets in the solar system revolve around the Sun because the Sun is

• made of hydrogen and helium
• older than other objects in the solar system.
• the source of most heat and light energy.
• the strongest source of gravity in the solar system.

Which of these actions is an example of gravity influencing other systems

• surface water evaporating into the atmosphere
• planets moving around the Sun in an elliptical pattern
• glaciers melting because of increasing temperatures
• groundwater moving to the surface in an artesian wel

What seasons is it in the Northern hemisphere when it is tilted away from the sun?

• spring
• summer
• autumn
• winter

What season is the Southern Hemisphere experiencing when it is tilted toward the sun?

• Spring
• Summer
• Winter
• Autumn

When it is summer in Greensboro, North Carolina, it is ____________ in Australia.

• Spring
• Summer
• Winter
• Autumn

What would happen if the Earth revolved at a faster rate?

• It would rain more often
• Daylight hours would decrease
• Seasons would be shorter
• Day and night would be shorter

Which of these is influenced the most by the gravitational force of the Sun?

• The tilt of the Earth
• The planet's masses
• The planet's orbits
• The number of moons per planet

How long does it take the Earth to take a full revolution around the sun?

• 24 hours
• 29 1/2 days
• 365 1/4 days 
• one month

Which reason is most responsible for the changing seasons on Earth?

• The tilt of Earth's axis 
• Earth's rotation
• The moon's revolution around Earth
• The change in distance between the Earth and sun

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

• 365 1/4 days
• 29 1/2 days
• 60 minutes
• 24 hours