Matter

Science

chemical change

a change that produces a new substance

chemical change Simple Definition

chemical property

a property that is not visible until a substance undergoes a chemical reaction, like solubility

chemical property Simple Definition

compound

the substance made when atoms from two or more elements combine chemically

compound Simple Definition

density

an object’s mass per unit volume

density Simple Definition

element

a substance made of one type of atom that cannot be broken down chemically

element Simple Definition

heterogeneous mixture

a mixture in which substances are not evenly mixed

heterogeneous mixture Simple Definition

homogeneous mixture

a mixture in which substances are evenly mixed (also called a solution)

homogeneous mixture Simple Definition

mass

the amount of matter in an object

mass Simple Definition

matter

anything that has volume and mass

matter Simple Definition

mixture

a combination of substances that keep their individual properties

mixture Simple Definition

molecule

a group of atoms held together by bonds

molecule Simple Definition

physical change

a change in size, shape, or state but not in identity

physical change Simple Definition

physical property

a property of a substance we can observe without changing its identity, like color or hardness

physical property Simple Definition

solution

a mixture of evenly distributed substances

solution Simple Definition

substance

an element or compound with the same composition and properties throughout

substance Simple Definition

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