model - a pretend version of something that scientists use when the real thing is too big, small, or complicated to work with, matter flow - the movement of material through an ecosystem, such as through food chains and food webs, consumer - a living thing that eats other living things, producer - a living thing that makes its own food, stomata - the tiny openings on plant leaves that take in carbon dioxide and release oxygen, carbon dioxide - a type of gas that plants sometimes take in and that animals release when they breathe, oxygen - a type of gas that animals use to breathe and that plants release, decompose - the process of breaking down dead living things, fungus - a living thing that is a decomposer and has spores, such as a mold or mushroom, variable - something that you can change in an experiment in order to test an idea, control - something in an experiment that you do not change,

5th Grade Mystery Science Unit 1: Lessons 1-3 Vocabulary

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