Ques: Q: What substance can be eroded by wind or water? Choices: - metal - wood - sand - soil A:
Ans: soil

Ques: Q: Minerals that are not compounds consist of a single what? Choices: - electron - gas - proton - element A:
Ans: element

Ques: Q: The pressurized gas of earth's atmosphere is contained by what force? Choices: - variation - light - plasma - gravity A:
Ans: gravity

Ques: Q: Tissues of marine bony fishes gain what from their surroundings? Choices: - toxins - absorb salts - mercury - excess salts A:
Ans:
excess salts