Unit 2 Review 2021

Front

An exothermic reaction is a reaction where energy is

Back

released to the surroundings as heat, and temperature increases.

Front

Which of the following is NOT an example of chemical change? sour milk, burning wood, rust

Back

breaking a pencil

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

Is melting butter for popcorn a chemical or physical change?

Back

physical

Front

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

Back

physical change

Front

Is burning wood a chemical or physical change?

Back

chemical

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