Question: Q: By 180 million years ago, pangaea began to do what? Choices: - combine - freeze - grow - break up A:
Answer: break up

Question: Q: In a fullerene, what atoms are bonded to three other atoms in a soccer ball pattern? Choices: - hydrogen - oxygen - positive - carbon A:
Answer: carbon

Question: Q: What do you call a substance that cannot be separated into smaller pieces, which is also defined by the number of protons it has? Choices: - electrol - molecule - atom - element A:
Answer:
element