Chemical Reactions

Property

A characteristic of a substance that doesn’t change.

Substance

Made of one type of material throughout.

Soluble

Describes a material that can dissolve in a particular substance.

State of Matter

One of the distinct forms in which matter can exist.

Dissolve

When a solid dissolves in a liquid, the solid breaks apart into particles too small too see and it mixes completely in the liquid.

Mixture

A blend of two or more substances.

Insoluble

Describes a material that does not dissolve in something else.

Viscosity

A measure of a fluid’s resistance to flow.

Solubility

When something has the ability to dissolve.

Density

How much matter there is in a certain space.

Flammability

How a substance interacts with fire.

Atom

Really small particles that can’t be divided or destroyed in chemical reactions or through phase changes.

Molecule

Made of more than one atom connected together.

Chemical Reaction

When new substances are produced from one or more molecules of the old substances.

Phase Change

1. When matter changes to form one state (solid, liquid, gas, plasma) to another.

2. New types of particles are created and no new substances are produced.

Products

The new substances that are produced from a chemical reaction.

Reactant

The original substances you start with before the chemical reaction occurs.

Element

A substance that can’t be broken down.

Compound

A thing that is composed of two or more separate elements that have been chemically combined.

Chemical Bonds

Holds molecules together.

Odor

1. A property of substance.

2. Determined by the number, type, and arrangement of atoms that make up that substance.

Pollutants

1. Harmful materials.

2. Part of acid rain.

Acid Rain

Any form of precipitation that is unusually acidic.