Vocabulary
This term means to spin on an axis.
What is rotation?
How long does it take Earth to complete one full rotation?
What is 24 hours?
The number of degrees Earth is tilted.
What is 23.5°?
How long it takes Earth to revolve around the Sun once.
What is 365 days (1 year)?
Name one way we know Earth rotates.
What is the movement of the Sun, Moon, or stars?
This term means to travel around or orbit something else.
What is revolution?
Earth rotates in this direction.
What is counter-clockwise (left to right)?
Earth's axis is always pointed toward this star.
What is the North Star (Polaris)?
Earth revolves around this object.
What is the Sun?
Name one object we observe to understand Earth's motion.
What are other planets?
A round, three-dimensional shape like a beach ball.
Day and night happen because the Earth does this.
What is rotates on its axis?
Earth's tilt helps explain changes in this.
What are the seasons?
The force that keeps Earth in orbit around the Sun.
What is gravity?
Rotation causes this daily cycle.
What is day and night?
The imaginary line Earth spins around from the North Pole to the South Pole.
What is the axis?
When the Eastern Hemisphere faces the Sun, this is happening there.
What is daytime?
The tilt may have been caused by this early event in Earth's history.
What is a collision with a large planetary body?
Earth's revolution also happens in this direction.
What is counter-clockwise?
Revolution causes this yearly cycle.
What are the seasons?
The theory that places the Sun at the center of the solar system.
What is Copernicus's heliocentric theory?
When one side of Earth faces away from the Sun, it experiences this.
What is nighttime?
This object likely formed as a result of that collision.
What is the Moon?
Each birthday means you've completed one of these.
What is a revolution around the Sun?
If Earth stopped rotating, this would no longer happen.
What is day and night?