Earth’s Motions
This motion of Earth causes day and night.
What is rotation?
The Moon shines because it does this with sunlight.
What is reflect sunlight?
A shadow forms when an object does this to light.
What is block it?
This force keeps planets in orbit around the Sun.
What is gravity?
Earth’s natural satellite.
What is the moon?
Earth takes about this long to complete one rotation.
What is 24 hours?
Moon phases occur because the Moon does this around Earth.
What is revolve/orbit?
Shadows always point this direction relative to the Sun.
What is away from the Sun?
Gravity pulls objects in this direction.
What is toward each other or toward the center of an object with mass?
The Moon is about this fraction of Earth’s diameter.
What is about 1/4?
Seasons happen because Earth revolves around the Sun AND has this.
What is a tilted axis?
When we see half of the Moon’s lit side, the phase is called this.
What is a quarter moon? (first quarter or third quarter)
Shadows are longest when the Sun is this in the sky.
What is low?
Planets stay in orbit because gravity pulls inward while they keep doing this.
What is moving forward?
The Sun looks about the same size as the Moon mainly because of this.
What is distance (the Sun is much farther away)?
When your hemisphere tilts toward the Sun, you usually experience this season.
What is summer?
Moon phases are NOT caused by this.
What is Earth's shadow?
At noon, shadows are usually this.
What is shortest?
The path an object takes around another object is called this.
What is an orbit?
Put these in order from smallest to largest: Earth, Sun, Moon
What is Moon → Earth → Sun?
If it’s daytime where you live, the opposite side of Earth is experiencing this.
What is nighttime?
The Moon takes about this long to complete one cycle of phases.
What is about one month (about 29 days)?
If your shadow points east, the Sun is probably here.
What is the west?
Without gravity, planets would most likely do this.
What is fly off in a straight line?
The Moon is about this many Earth diameters away.
What is about 30?