What is the number of planets in our solar system?
100
Without this, the Earth would not experience seasons.
What is the tilt of Earth's axis?
100
Each shape that the moon seems to go through.
What is a phase?
100
This force keeps the planets and moons in their orbits.
What is gravity?
200
How long does it take the Earth to make one complete rotation on its axis?
What is one day or 24 hours?
200
Mercury, Venus, Earth and Mars
What are the inner planets?
200
When part of the Earth is tilted closer to the sun, that part of the world experiences this season.
What is summer?
200
29.5 days
What is a lunar month?
200
The imaginary line that passes through Earth's poles.
What is the Earth's axis?
300
The effect of the Earth rotating on its axis.
What causes day and night?
300
Jupiter, Saturn, Uranus, and Neptune
What are the outer planets?
300
When part of the Earth is tilted away from the sun, that part of the world experiences this season.
What is winter?
300
The first moon of a lunar month.
What is a new moon?
300
This type of orbit describes the Moons orbit around Earth as well as Earth's orbit around the sun.
What is an elliptical orbit?
400
What is the scientific word for Earth's orbit around the sun?
What is "revolution"?
400
A planet that is smaller than a regular planet.
What is a dwarf planet?
400
During winter, that part of the Earth receives this type of sunlight.
What is indirect rays of sunlight?
400
When a calendar month has two full moons. The second full moon has special name.
What is a blue moon?
400
The main difference between the composition of the inner planets and the outer planets.
What is the inner planets are solid and the outer planets are gas?
500
The number of orbits Juan has experienced in his lifetime if he is 11 years old.
What is 11?
500
Only the outer planets have this unique feature.
What is rings?
500
If the northern hemisphere is experiencing winter, the southern hemisphere is experiencing this season.
What is summer?
500
When one body in space blocks light from reaching another body.
What is an eclipse?
500
The name of the large telescope that NASA launched into space in 1990. It travels around Earth facing space, taking pictures of planets, stars and galaxies.