Exploring Matter: Changes and Properties

A process where substances combine or break apart to form new substances with different properties.

Production of heat and light, formation of a precipitate, color change, or gas production.

A chemical reaction that releases heat, making the surroundings warmer.

A chemical reaction that absorbs heat, making the surroundings cooler.

The properties change because new substances are formed.

A solid that forms and settles out of a liquid mixture during a chemical reaction.

A physical change alters the form of a substance without changing its identity, while a chemical change results in the formation of new substances.

A chemical change where iron reacts with oxygen and moisture to form iron oxide (rust).

A chemical change that occurs when a substance reacts rapidly with oxygen, producing heat and light.

In a chemical reaction, mass is neither created nor destroyed; it is conserved.