7.1 Chemical Reactions and Matter

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What is dissolving?

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Dissolving is the process where a substance breaks down into particles inside a liquid, forming a solution.

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What is a mixture?

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A mixture is a combination of two or more substances where each substance retains its own properties.

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What is evidence in scientific terms?

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Evidence is data collected from experiments that supports a claim or hypothesis.

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How do new substances form from old substances?

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New substances can form when particles of old substances break apart and rejoin in different ways, creating substances with new identities.

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NGSS.MS-PS1-5

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What is a chemical change?

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A chemical change is a process where substances transform into new substances with different properties.

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NGSS.MS-PS1-5

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What are signs of a chemical change?

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Signs of a chemical change include fizzing, bubbling, color change, temperature change, and the formation of a precipitate.

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NGSS.MS-PS1-2

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What is the difference between a physical change and a chemical change?

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A physical change alters the form of a substance but not its chemical composition, while a chemical change results in the formation of new substances.

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NGSS.MS-PS1-2

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What is a solute?

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A solute is the substance that is dissolved in a solution.

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What is a solvent?

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A solvent is the substance that dissolves the solute, typically a liquid.

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What is a chemical reaction?

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A chemical reaction is a process that leads to the transformation of one set of chemical substances to another.

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NGSS.MS-PS1-2

NGSS.MS-PS1-5