Changes in Matter

Front

Physical Change Noun

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[fiz-i-kuhl cheynj]

Back

Physical Change

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A change that alters the form or appearance of matter but does not create a new substance.

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Example: Ice melting into water shows a physical change as the form changes but no new substance is created.

Front

Chemical Change Noun

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[kem-i-kuhl cheynj]

Back

Chemical Change

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A change in matter that produces one or more new substances, also known as a chemical reaction.

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Example: Hydrogen and oxygen react to form water, showing a chemical change.

Front

State of Matter Noun

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[steyt uhv mat-er]

Back

State of Matter

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The distinct physical form in which a substance can exist, such as a solid, liquid, or gas.

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Example: The image shows solid, liquid, and gas states with particle arrangements, explaining how matter exists in different forms.

Front

Dissolving Noun

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[dih-zolv-ing]

Back

Dissolving

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A physical process where a substance mixes completely with a liquid to form a uniform solution.

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Example: Solute particles evenly mix with the solvent to form a uniform solution.

Front

Filtration Noun

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[fil-trey-shuhn]

Back

Filtration

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A physical method used to separate solid particles from a fluid by passing it through a filter.

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Example: The image shows how a mixture is poured through a funnel with filter paper, trapping solid particles and allowing clear liquid to pass through.

Front

Distillation Noun

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[dis-tuh-ley-shuhn]

Back

Distillation

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A physical process of separating components of a liquid mixture by using selective boiling and condensation.

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Example: The image shows how distillation separates liquids by boiling and condensing them.

Front

Combustion Noun

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[kuhm-buhs-chuhn]

Back

Combustion

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A rapid chemical reaction between a substance and an oxidant, usually oxygen, to produce heat and light.

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Example: Combustion is shown as a reaction where hydrocarbons and oxygen produce carbon dioxide, water, and energy.

Front

Tarnishing Noun

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[tahr-nish-ing]

Back

Tarnishing

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A slow chemical change where a metal's surface darkens due to a reaction with a nonmetal substance.

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Example: The image shows rings with tarnished surfaces, demonstrating how metals darken over time due to chemical reactions.

Front

Law of Conservation of Mass Noun

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[law uhv kon-ser-vey-shuhn uhv mas]

Back

Law of Conservation of Mass

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The scientific principle stating that matter is not created or destroyed in any chemical or physical change.

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Example: The image shows a chemical reaction in a closed system where the mass before and after remains the same, demonstrating the Law of Conservation of Mass.

Front

Compound Noun

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[kom-pound]

Back

Compound

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A substance formed when two or more different chemical elements are chemically bonded together in a fixed ratio.

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Example: The image shows a CO2 molecule, illustrating how two oxygen atoms are bonded to one carbon atom, forming a compound.