Sun, Moon and Earth System

One complete revolution of Earth around the sun takes about

• one rotation.
• one season.
• one year.
• one eclipse.

Earth has seasons because

• it rotates on its axis.
• the distance between Earth and the sun changes.
• its axis is tilted as it moves around the sun.
• the temperature of the sun changes.

In the Southern Hemisphere, the summer solstice occurs when the sun is

• at the equator.
• farthest south.
• farthest north.
• closest to Earth.

Earth’s rotation takes about

• 365 days.
• 6 months.
• 24 hours.
• 1 month.

If the rotation period of Moon were to decrease, then __________.

• the length of day on Earth would decrease
• the frequency of lunar eclipses would decrease
• both sides of Moon would be visible from Earth
• the phases of the Moon would take less time to change

As the Earth revolves around the sun, the tilt of its axis changes the angle that the sun's rays strike the surface, therefore causing a change of_____________ .

• phases
• eclipses
• seasons
• density

The Earth's seasons are the result of the tilt of the Earth's ___________ as the Earth orbits the sun.

• axis
• moon
• continents
• tectonic plates

Which number in the diagram shows the relationship between the sun and Earth when it is Summer in North America? 

• Number 1
• Number 2
• Number 3
• Number 4

What season is it in Utah when the southern hemisphere of the Earth is tilted toward the Sun?

• spring
• fall
• winter
• summer

Which factor listed below has no affect on Earth's seasons?

• the tilt of the Earth's axis
• the revolution of the Earth around the sun
• the revolution of the Moon around the Earth
• the energy that the Earth receives from the Sun