Q: Where are the oceans most polluted? Choices: - in warmer waters - on the ocean floor - along reefs - along coasts A:
along coasts

Q: What element makes up the majority of coal? Choices: - iron - lead - silicon - carbon A:
carbon

Q: What do you call the hard case that surrounds the soft parts of some animals? Choices: - muscles - shell - membrane - exoskeleton A:
exoskeleton