Concept 1.5 Test: Chemical Reactions

Front

What does the Law of Conservation of Mass state?

Back

Atoms cannot be gained or lost in a chemical reaction.

Front

What are the substances on the left part of a chemical equation called?

Back

Reactants

Front

The starting materials in a chemical reaction are called ___________ .

Back

reactants

Front

How do chemical reactions turn substances into new substances?

Back

The bonds break, the atoms rearrange, forming new bonds and new molecules.

Front

If you combine two substances in a beaker at room temperature and the beaker feels cold to the touch, it means that the substances:

Back

have undergone an endothermic reaction.

Front

What are the substances formed as a result of a chemical reaction called?

Back

Products

Front

What is a chemical equation?

Back

A representation of a chemical reaction using symbols and formulas.

Front

What is an endothermic reaction?

Back

A reaction that absorbs heat from its surroundings.

Front

What is an exothermic reaction?

Back

A reaction that releases heat to its surroundings.

Front

What happens to the bonds in a chemical reaction?

Back

The bonds break and new bonds form.