Grade 6 TEKS 6.5A, 6.5C Vocabulary

Chemical change

A change in matter that produces one or more new substances

Combustion (burning)

A chemical reaction between a fuel and oxidant, producing heat.

Mixture

A combination of two or more substances that are not chemically combined

Element

A pure substance made of only one kind of atom

Pure Substance

A sample of matter, either a single element or a single compound, that has definite chemical and physical properties

Solid

A state of matter that has a definite shape and a definite volume

Liquid

A state of matter that has a definite volume but no definite shape.

Gas

A state of matter with no definite shape or volume

Compound

A substance made up of atoms of two or more different elements joined by chemical bonds

Matter

Anything that has mass and takes up space

Unexpected temperature change

During chemical bonding, energy is released or absorbed making their surroundings hotter or cooler.

Bubbles

Gas is given off during a chemical reaction; may or may not have an odor. Sign of a chemical reaction.

Unexpected color change

New molecules created in a chemical reaction radiate light differently producing new colors.

Precipitates

Solid or liquid that form out of solution due to a chemical reaction

Chemical reaction

the process by which one or more substances change to produce one or more different substances