Chemical Reactions Quiz

Different substances can have different properties. Mark only one oval. True or False.

• True

• False

When you mix substances, you sometimes end up with a mixture that has _____ properties.

• the same
• new

In a ______________, substances are mixed and at least one new substance with different properties is formed.

• mixture

• chemical reaction
• chemical experiment

______________ changes such as changing color, producing light, or producing gas can be evidence of a chemical reaction.

• Physical

• Chemical

We cannot always tell that a chemical reaction has happened based on physical evidence.

• True

• False

In a chemical reaction, the _________ in molecules that make up the substances and recombine to make new molecules.

• substances

• atoms
• properties

__________ is the stuff that things are made of.

• matter

• molecules

• particles

In a chemical reaction, matter is created or destroyed.

• True

• False

By choosing which ___________ to combine, engineers can control the results of a chemical reaction.

• molecules
• atoms

• substances

Wastewater treatment plants use ____________ to help them clean wastewater.

• potions

• soap

• chemical reactions