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Foreman/Stapp - 5

Formation of a New Substance - 6.5C

TermDefinition
Chemical Change A change that alters the identity of a substance resulting in a new substance or substances with different properties.
Element A pure substance composed of the same type of atom throughout.
Compound A substance made of two or more elements that are chemically combined in fixed amounts.
Substance Any form of matter that is uniform throughout and has consistent properties.
Temperature Change Increase or decrease of heat energy in a substance may be evidence of a new substance formed during chemical change.
Color Change A change in the way something reflects light, can indicate a chemical change.
Production of Gas Evidence of a new substance formed from a chemical change.
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.
Production of Light Evidence of release of energy during a chemical change.
Matter Anything that has mass and takes up space.
Properties Physical and chemical characteristics of matter used to describe or identify a substance.
States of Matter Distinct forms of matter known in everyday experience: solid, liquid, and gas; also referred to as phases.
Mass A measure of how much matter is present in a substance.
Physical Property Characteristic that can be observed or measured without changing the substance; for example, color, melting point, or conductivity.
Chemical Property A characteristic that can only be observed or measured when atoms of matter rearrange during a chemical change.
Chemical Formula A shorthand notation that uses chemical symbols and numbers as subscripts to represent the type and number of atoms that are present in the smallest unit of the substance
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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