Unit 2 Signature Experience

Hydrogen is a

Oxygen is a

Water (H2O) is an

Which side of the chemical equation represents the reactants?

Which side of the chemical equation represents the products?

What does the arrow mean?

Is the chemical equation for water (H2 + O → H2O) balanced or unbalanced?

When water is formed from hydrogen and oxygen, is this a physical or chemical change?

When water is changed from a liquid to a solid by freezing, is this a physical or chemical change?

The ocean an example of a

When we mix salt (NaCl) with water (H2O) is this a physical or chemical change?