Unit 1 Chem A Review

Front

What is an example of a chemical change?

Back

Burning wood.

Front

What is the definition of a chemical change?

Back

A change in substance that changes its identity.

Front

What is the difference between an element and a compound?

Back

An element is made up of one type of atom, while a compound is made up of two or more different types of atoms.

Front

What is the law of conservation of matter?

Back

Matter is never created or destroyed, only changed.

Front

What is the definition of a heterogeneous mixture?

Back

A mixture with a non-uniform composition.

Front

What is a physical change?

Back

A change that does not alter the chemical composition of a substance.

Front

Can a chemical change be reversed?

Back

Most chemical changes are not reversible, but some can be reversed through specific reactions.

Front

What is an example of a physical change?

Back

Melting ice.

Front

What is the definition of a homogeneous mixture?

Back

A mixture with a uniform composition throughout.

Front

What is the difference between a pure substance and a mixture?

Back

A pure substance has a constant composition, while a mixture contains two or more substances that can vary in composition.