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Formation of a New Substance
Picture Vocabulary
Matter and Energy
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Element
A pure substance composed of the
same type of atom throughout.
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Chemical Change
A change that alters the identity of a substance resulting in a new substance or substances
with different properties.
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Physical Change
A change to a substance that occurs without forming a new substance, such as a change in size or state of matter.
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Chemical Property
A characteristic that can only be observed or measured when atoms of matter
rearrange during a chemical change.
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Physical Property
Characteristic that can be observed or measured without changing the substance; for example,
color, melting point, or conductivity.
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Compound
Pure substance made of two or more kinds of
atoms bound together.
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Properties
Physical and chemical characteristics of matter
used to describe or identify a substance.
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States of Matter
Distinct forms of matter known in everyday experience: solid, liquid, and gas;
also referred to as phases.
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Production of Heat or Light
Evidence of release of energy during a chemical change.
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Production of a Precipitate
Evidence of a new substance formed from a chemical change, resulting in solid
particles that form or separate out of a liquid.
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Production of Gas
Evidence of a new substance formed from a chemical change.
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Substance
Any form of matter that is uniform throughout
and has consistent properties.
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Color Change
Visible change in substance coloration is evidence of a new substance formed from a chemical change.
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Temperature Change
Increase or decrease of heat energy in a substance may be evidence of a new
substance formed during a chemical change.
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Matter
Matter is anything that has volume and mass.
Matter occurs as elements, compounds,
and mixtures.