This printable crossword puzzle has 20 clues. Answers range from 4 to 16 letters long. This crossword is also available to download as a Microsoft Word document or a PDF.
What was earth originally made out of?
What was the name of the young planet that hit earth?
What liquid was in asteroids that hit the Earth that was a key ingredient to life?
What's the first living colony called?
What's the name of the supercontinent?
What’s the powerful force that breaks the supercontinent apart?
When the carbon dioxide from the volcano mixes with water what does it make?
What broke snowball Earth?
What was created when the suns ultraviolet rays reacted with water molecules?
What was the second continent after the supercontinent?
When oxygen meets with the suns radiation what gas is made?
What was the first fish that could walk on land named?
What did the plants that died 300 million years ago turn into?
What gas was frozen in the oceans?
What is the supercontinent that is left after all life was wiped?
After 95% of the old species were wiped, what species came next?
What was the name of the first dinosaur mentioned in the video?
What died at the bottom of the ocean floor that became oil?
What ocean was created between the supercontinent separation?
What animal resembles dolphins that adapted in the water?