Universe
Galaxies
Planets
Solar System
Stars
100
The creation of the universe
What is The Big Bang Theory
100
A cluster of stars.
What is a galaxy?
100
These planets are made of rock.
What are the inner planets?
100
This is the center of the Solar System.
What is the Sun?
100
A burning ball of gas.
What is a star?
200
Our galaxy.
What is the Milky Way Galaxy?
200
These planets are made of gases.
What are the outer planets?
200
The 8 objects that revolve around the Sun.
What are the planets?
200
The closest star to Earth
What is the Sun?
300
How long ago our universe was created.
What is 3.7 bya?
300
The Milky Way is an example of this type of galaxy.
What is a spiral galaxy?
300
Mercury, Venus, Earth, and Mars make up the...
What is the inner planets
300
This object is made up of the same material that made the planets.
What is an asteroid?
300
Hydrogen and Helium
What are the elements that make up our Sun?
400
A small, infinitely dense point. What the universe started as.
What is a singularity?
400
A galaxy that has no definite shape because it may have collided with another galaxy.
What is an irregular galaxy?
400
Jupiter, Saturn, Uranus, Neptune make up the...
What are the outer planets?
400
This object is made of smaller pieces of broken up comets.
What is a meteoroid?
400
The process by which the Sun produces energy
What is nuclear fusion?
500
Large amounts of this in our universe is evidence that the Big Bang happened.
What is radiation? What is hydrogen and helium?
500
A galaxy with older stars that is disk shaped.
What is an elliptical galaxy?
500
Revolve around the Sun, have a spherical shape, and clear its path around the Sun.
What is a planet?
500
A meteoroid that strikes the Earth's surface.
What is a meteorite?
500
The idea that the Sun is the center of the Solar System.
What is the heliocentric theory?
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