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What only happens during a chemical reaction? a. A solution is made. b. New substances are formed. c. Bubbles form. d. Colors change.
answered
Jan 28, 2016
Biology
high-school
3
votes
99.4k
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Select all of the answers that apply. Which of the following are ways the atmosphere supports life? contains trace gases blocks harmful UV rays transports and distributes heat cycles essential elements:
answered
Sep 10, 2015
Chemistry
high-school
6
votes
213k
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