Astronomers
Planets
Atom or Ion
Matter
100

This astronomer is known as the "father of modern astronomy".

Who is Nicolaus Copernicus?

100

The only planet that can support life in our solar system

What is Earth?

100

This element has 74 proton and 74 electron

What is Atom?

100

This state a matter a rock would fall under 

What is solid?

200

This astronomer discovered the law of gravity which was crucial in proving the planets orbited around the sun 

Who is Isaac Newton?

200

The smallest planet in our solar system 

What is Mercury? 

200

This element's atomic number is 6 and has 6 electrons 

What is an atom

200

This state of matter is what air would fall under 

What is gas?

300

This astronomer discovered the three laws of planetary motion 

Who is Johannes Kepler

300

This planet is known as the red planet 

What is Mars?

300

This element is number 7 and has 10 electrons

What is an ion

300

This state of matter is what honey would fall under

What is liquid 

400

This astronomer counted 1,025 stars and compiled a star catalog with said stars. 

Who is Ptolemy?

400

This planet is about the same size as Earth

What is Venus?

400

This Helium particle has 3 electrons 

What is an ion

400

This state of matter is what the Sun would fall under

What is plasma

500

This astronomer had the best theory of the supernova

Who is Tycho Brache?

500

The planet furthest from the Sun

What is Neptune?

500

This element with the symbol of H has 1 electron

What is an atom

500

This is the definition of matter 

Anything that has mass and volume