Space

How does tides form?

• by the earth going around the sun
• the earth going around the moon
• the sun going around the mars
• the moon going around the earth

The imaginary line running through the center of Earth.

• axis
• moon
• constellation
• orbit

What are the reasons for the seasons?

• Earth's tilt and rotation.
• Earth's rotation and revolution.
• Earth's tilt and revolution.
• Earth's tilt and resolution

Day and night is caused by the _____________ of Earth on its axis.

• revolution
• orbit
• rotation

The pull of Earth's gravity is strongest on objects at 

• sea level
• mountain level
• the center of gravity
• Earth's orbit

The sun is over ______________ times larger than the Earth

• one thousand
• one million
• one billion
• two light years