Question: Answer the following question given this paragraph: A chemical reaction is a process that changes some chemical substances into other chemical substances. The substances that start a chemical reaction are called reactants . The substances that form as a result of a chemical reaction are called products . During the reaction, the reactants are used up to create the products. For example, when methane burns in oxygen, it releases carbon dioxide and water. In this reaction, the reactants are methane (CH 4 ) and oxygen (O 2 ), and the products are carbon dioxide (CO 2 ) and water (H 2 O). Q: What is a process that changes some chemical substances into other chemical substances? Choices: - a bio reaction - spontaneous mutation - cellular respiration - a chemical reaction A:
Answer: a chemical reaction

Question: Answer the following question given this paragraph: The theory of plate tectonics brings together continental drift and seafloor spreading. Q: What theory brings together continental drift and seafloor spreading? Choices: - theory of order tectonics - theory of water tectonics - theory of front tectonics - theory of plate tectonics A:
Answer: theory of plate tectonics

Question: Answer the following question given this paragraph: Solstice refers to the position of the Sun when it is closest to one of the poles. At equinox, the Sun is directly over the Equator. Q: When is the sun directly over the equator? Choices: - Winter - Midsummer - Fall - equinox A:
Answer:
equinox