Quiz about Chemical Changes

Question 1

Which of the following is a sign that a chemical reaction has occurred?

Accepted Answer

formation of a gas

Answer

change in shape

Answer

melting

Answer

dissolving

Question 2

Is melting butter for popcorn a chemical or physical change?

Accepted Answer

physical

Answer

chemical

Question 3

Which of the following is NOT an example of a physical change?

Accepted Answer

rust

Answer

crumpled paper

Answer

pencil sharpening

Answer

shrunken clothing

Question 4

A change where one or more new substances are created.

Accepted Answer

Chemical Change

Answer

Physical Change

Question 5

Fizzing, foaming, and burning are all examples of

Accepted Answer

Chemical change

Answer

Physical change

Question 6

When you break a cracker into pieces it is a...

Accepted Answer

Physical change

Answer

Chemical change

Question 7

Which of these is a result of a chemical change?

Accepted Answer

A new substance

Answer

A mixture

Answer

A solution

Answer

Melting or freezing

Question 8

Ice melting

Accepted Answer

Physical Change

Answer

Chemical Change

Question 9

Water freezing

Accepted Answer

Physical Change

Answer

Chemical Change

Question 10

Wood burned in a fireplace

Accepted Answer

Chemical Change

Answer

Physical Change

Question 11

Shredding a piece of paper

Accepted Answer

Physical Change

Answer

Chemical Change

Question 12

Boiling water

Accepted Answer

Physical Change

Answer

Chemical Change

Question 13

What form of energy is being CREATED here? There is more than one answer!

Accepted Answer

Radiant (Light)

Accepted Answer

Thermal

Answer

Electrical

Answer

Mechanical

Question 14

When your food energy is made into energy that you use to run, energy is changing from...

Accepted Answer

Chemical to mechanical

Answer

Thermal to chemical

Answer

Chemical to electrical

Answer

Mechanical to electrical

Question 15

When you shiver because you are cold, you are transforming...

Accepted Answer

Mechanical energy into thermal energy

Answer

Chemical energy into radiant (light) energy

Answer

Electrical energy into chemical energy

Answer

Thermal energy into chemical energy

Question 16

When you eat a meal and your temperature increases, you are transforming...

Accepted Answer

Chemical energy into thermal energy

Answer

Thermal energy into mechanical energy

Answer

Radiant (light) energy into mechanical energy

Answer

Chemical energy into mechanical energy

Question 17

Which of the following is a sign that a physical change has occurred?

Accepted Answer

The object being broken into smaller pieces

Answer

Bubbles forming

Answer

Heat being produced

Answer

Light being produced

Question 18

What kind of energy is food?

Accepted Answer

Chemical energy

Answer

Thermal energy

Answer

Mechanical energy

Answer

Solar energy

Question 19

When you eat lunch and then talk to your friend, that is a conversion of...

Accepted Answer

Chemical energy to sound energy

Answer

Mechanical energy to wind energy

Answer

Chemical energy into mechanical energy

Answer

Sound energy into thermal energy

Question 20

Which of the following is observed here?

Accepted Answer

A chemical change because you are forming a new substance

Answer

A physical change because you have the same types of atoms

Answer

A physical change because you are just breaking the atoms up

Answer

A chemical change because atoms are involved

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