Ques: Q: What is the name of the protective layer of gases that surrounds the earth and blocks harmful rays from the sun? Read this paragraph and choose the correct option from the provided answers: The atmosphere protects living things from the Sun's most harmful rays. Gases reflect or absorb the strongest rays of sunlight. Figure below models this role of the atmosphere. Choices: - the corona - the protector - the coma - the atmosphere A:
Ans: the atmosphere

Ques: Q: Which mineral do native americans use to decorate items? Read this paragraph and choose the correct option from the provided answers: Some minerals are valuable simply because they are beautiful. Jade has been used for thousands of years in China. Native Americans have been decorating items with turquoise since ancient times. Minerals like jade, turquoise, diamonds, and emeralds are gemstones. A gemstone is a material that is cut and polished to use in jewelry. Many gemstones, such as those shown in Figure below , are minerals. 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? Read this paragraph and choose the correct option from the provided answers: Habitats 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 their decay. 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? Read this paragraph and choose the correct option from the provided answers: In 1905, the physicist Albert Einstein developed a new theory about electromagnetic radiation. The theory is often called the wave-particle theory . It explains how electromagnetic radiation can behave as both a wave and a particle. Einstein argued that when an electron returns to a lower energy level and gives off electromagnetic energy, the energy is released as a discrete "packet" of energy. We now call such a packet of energy a photon . According to Einstein, a photon resembles a particle but moves like a wave. You can see this in the Figure below . The theory posits that waves of photons traveling through space or matter make up electromagnetic radiation. Choices: - energy - bacteria - sound - particle A:
Ans:
particle