Ques: Q: What is the name of the protective layer of gases that surrounds the earth and blocks harmful rays from the sun? Choices: - the corona - the protector - the coma - the atmosphere A:
Ans: the atmosphere

Ques: Q: Which mineral do native americans use to decorate items? Choices: - Tanzanite - Topaz - Amethyst - turquoise A:
Ans: turquoise

Ques: Q: Nearly all protists exist in some type of aquatic environment, including freshwater and marine environments, damp soil, and even snow. several protist species are parasites that infect animals or plants. a few protist species live on dead organisms or their wastes, and contribute to what? Choices: - greenhouse gas - habitat loss - spontaneous mutation - their decay A:
Ans: their decay

Ques: Q: Einstein developed a theory about how electromagnetic radiation can behave as both a wave and what else? Choices: - energy - bacteria - sound - particle A:
Ans:
particle