Which of the following is an exampleof conservation of mass? a. mass before = 3g mass after = 3g b. mass before = 4g mass after = 3g c. mass before = 6g mass after = 12g

Which of the following are false concerning microbes? a. microbes generate oxygen through photosynthesis.b. the primary role of microbes on the planet involves causing disease in animals and humans.c. microbes produce vitamins in the intestines.d. microbes play a role in breaking down waste and decomposing dead organisms.

For a comparative or experimental investigation, scientists often make a testable about a scientific question, and then they test it in the investigation. a.control b.hypothesis c.procedure d.system

Categorize each term as something that is typical of a scientific theory, a scientific hypothesis, or both. makes predictions