Chemical changes do NOT result in a new substance being formed.

Which is a sign that a chemical reaction is taking place?

How do you know for sure that a chemical reaction is taking place?

What happens in a chemical reaction?

The substances to the left of the arrow in a chemical equation are called the

The total mass before a chemical reaction is the same after a chemical reaction. This is the law of

Whose research contributed to the law of conservation of mass?

A number placed in front of an element symbol or chemical formula is called a

A reaction in which two or more substances combine and form one compound is called a

A reaction in which a single reactant breaks down into two or more products is called a

Negative ions in 2 compounds switch places in which kind of reaction?

What happens to energy when a chemical bond is broken?

In an exothermic reaction, energy is...

The minimum amount of energy needed to start a chemical reaction is called

We can make a chemical reaction occur faster if we

When a catalyst is added to a reaction, it is considered a reactant.

A catalyst that speeds up chemical reactions in living cells is called a(n)

A preservative is an example of a(n)

A description of a reaction using element symbols and chemical formulas is called a

A reaction that absorbs energy is called

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