Earth
This causes the Earth's seasons.
Earth's revolution around the sun.
The word "solar" refers to this object.
The sun
It takes this long for the moon to revolve completely around the Earth.
29.5 days (about a month)
This keeps the Earth and moon in their orbits.
Gravity
This word describes the Earth spinning continuously.
Rotating
The Earth takes this long to revolve around the sun.
365 days (1 year)
The sun is a big fiery ball of gas called this.
A star
Solar refers to the sun. This term refers to the moon.
Lunar
It takes this long for the Earth to complete on full rotation.
24 hours (1 day)
The term used when only a small sliver of the moon is visible.
Crescent
When it is winter in North America, it is this in Australia.
This occurs when the moon moves between the sun and the Earth, blocking some the the sun's light.
A solar eclipse
During this phase of the moon, we can see no light from the moon.
New Moon
This object is used to study far away objects in the sky.
Telescope
This term is used to describe the phase of the moon when we see all of the lit side.
The imaginary line that runs from the North Pole to the South Pole.
Earth's axis
This is how the sun's rays strike the Earth in the summer.
Directly
During this process, the moon moves through the Earth's shadow, and cannot be seen for a short time.
A lunar eclipse
This term is used to describe a "growing" moon.
As we see less and less of the lit part of the moon, we say that it is doing this.
Waning