Quick Review: Physical & Chemical Changes

Front

An exothermic reaction is a reaction where energy is

Back

released to the surroundings as heat, and temperature increases.

Front

A change in which NEW substances are formed.

Back

Chemical change

Front

Which of the following IS a physical change? Getting a haircut, Rusty metal, sour milk, burning paper

Back

Getting a haircut

Front

A change in the size, shape, or state of matter.

Back

physical change

Front

Water boiling is a _______ change.

Back

Physical Change

Front

If there are 4 atoms of nitrogen in the reactants, how many atoms of nitrogen will there be in the products?

Back

4

Front

Fill in the blank:
The law of conservation of mass states that matter cannot be created nor __________________.

Back

destroyed

Front

In a chemical reaction, the mass of the reactants was 15g. According to the Law of Conservation of Mass what is the mass of the products?

Back

15g

Front

How does the mass of the reactants in the equation compare to the mass of the products?

Back

It's the same.

Front

A chemical reaction that absorbs energy is called an

Back

endothermic reaction