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Chemisrty (Matter (Liquid (a substance that flows freely but is of…
Chemisrty
Matter
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gas
a substance or matter in a state in which it will expand freely to fill the whole of a container, having no fixed shape and no fixed volume
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Standards
PS1-2
Analyze and interpret data on the properties of substances before and after the substances interact to determine if a chemical reaction has occurred.
PS1-4
Develop a model that describes and predicts changes in particle motion, relative spatial arrangement, temperature, and state of a pure substance when thermal energy is added or removed.
PS1-1
Develop a model to describe that (a) atoms combine in a multitude of ways to produce pure substances which make up all of the living and nonliving things that we encounter, (b) atoms form molecules and compounds that range in size from two to thousands of atoms, and (c) mixtures are composed of different proportions of pure substances.
PS1-5
Use a model to explain that atoms are rearranged during a chemical reaction to form new substances with new properties. Explain that the atoms present in the reactants are all present in the products and thus the total number of atoms is conserved.
phase changes
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Phase changes are physical changes of a substance from one state (solid or liquid or gas) to another without a change in its chemical formula / composition.
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mixture
Matter that consists of two or more pure substances that are physically but not chemically combined.
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