A full orbit of the Earth around the Sun is called this.
What is a revolution?
100
This is occurs one part of a planet to face toward the Sun for a while.
What is day?
100
A layer of this helps prevent Earth from overheating in the Sun’s rays both by reflecting some of the Sun’s energy into space and absorbing other energy.
What is air?
100
This is caused by the Earth's tilt during its orbit.
What is our seasons?
200
This takes about 28 days to make its full orbit around Earth.
What is the Moon?
200
This occurs when the same part of the planet turns away from the Sun.
What is night?
200
Some planets in the solar system have little or none of this.
What is an atmosphere?
200
The amount of this energy received by an area creates its climate and seasons.
What is light?
300
This keeps the Earth and the seven other planets in orbit around the sun.
What is gravity?
300
This is the imaginary line that the Earth spins on.
What is its axis?
300
This has has almost no atmosphere.
What is the Moon?
300
When this strikes near the poles, they are more spread out.
What are rays?
400
This is the shape of an orbit's path
What is an ellipse?
400
This is one whole spin of an object on its axis.
What is a rotation?
400
Earth rotated more at this speed, days would get hotter while nights would get colder.
What is slowly?
400
These places have much colder climates than the equator.
What are the polar regions?
500
This is made of the Sun and its eight planets along with many moons, asteroids, and comets.
What is our solar system?
500
It takes about this amount of time for the Earth to complete on rotation.
What is 24 hours?
500
This holds warm air near the planet’s surface, releasing thermal energy slowly into space.
What is our atmosphere?
500
This causes the number of daylight hours to change during the year.