Solar System

Why do we have day and night?

• Because the earth revolves around the sun.
• Because the sun revolves around the earth
• Because the earth rotates on an axis
• Because sun rotates on an axis

When the part of earth you are on is tilted tward the sun, what season is it?

• winter
• spring
• summer
• fall

What force "holds" the planets in orbit?

• inertia
• gravity
• air pressure
• magnetism

About how long does it take for the moon to rotate around the earth?

• a day
• a week
• a month
• a year

Different time zones area  result of...

• earth's rotation
• moon's rotation
• earth's revolution
• moon's revolution

How long is a tide cycle?

• six hours
• twelve hours
• twenty four hours
• twenty eight hours

The moon is visible from earth because

• it transmits light from the sun
• it produces its own light
• it reflects the sunlight
• it absorbs light from the atmosphere

When the moon appears to be getting bigger, we call this...

• waxing
• waning
• full
• new

The time it takes the earth to revolve around the sun is

• an hour
• a day
  a
• a month
  a year
• a year

Tides are caused by

• the earth's rotation on an axis
• strong winds blowing water onto the coasts
• the difference in gravitational pull of the sun
• the differences in the gravitational pull of the moon