Quiz about Chemical and Physical Changes

Question 1

Ice melting

Accepted Answer

Physical Change

Answer

Chemical Change

Question 2

Wood burned in a fireplace

Accepted Answer

Chemical Change

Answer

Physical Change

Question 3

Cake batter baked in an oven

Accepted Answer

Chemical Change

Answer

Physical Change

Question 4

Baking soda and vinegar combine to make carbon dioxide

Accepted Answer

Chemical Change

Answer

Physical Change

Question 5

Glass bottle that is shattered

Accepted Answer

Physical Change

Answer

Chemical Change

Question 6

Copper roof changing color

Accepted Answer

Chemical Change

Answer

Physical Change

Question 7

Rust on an iron fence

Accepted Answer

Chemical Change

Answer

Physical Change

Question 8

Shredding a piece of paper

Accepted Answer

Physical Change

Answer

Chemical Change

Question 9

Boiling water

Accepted Answer

Physical Change

Answer

Chemical Change

Question 10

What happens in ALL chemical changes?

Accepted Answer

A new substance is formed

Answer

Change in state of matter

Answer

Bubbles are produced

Answer

An explosion

Question 11

A change where one or more new substances are created.

Accepted Answer

Chemical Change

Answer

Physical Change

Question 12

What happens in a chemical change?

Accepted Answer

The atoms in the reactants rearrange themselves and bond together differently to form one or more new products with different characteristics than the reactants. When a new substance is formed.

Answer

When objects or substances undergo a change that does not change into a different substance.

Question 13

What happens in a physical change?

Accepted Answer

When objects or substances undergo a change that does not change into a different substance.

Answer

The atoms in the reactants rearrange themselves and bond together differently to form one or more new products with different characteristics than the reactants. When a new substance is formed.

Question 14

Which type of change can be undone?

Accepted Answer

Physical

Answer

Chemical

Question 15

What happens to the weight of matter when it undergoes chemical changes?

Accepted Answer

It stays the same

Answer

It increases

Answer

It decreases

Question 16

What happens to the weight of matter when it undergoes a physcial change?

Accepted Answer

It stays the same

Answer

It increases

Answer

It decreases

Question 17

What happens to wood after being burned?

Accepted Answer

All of the above.

Answer

It may seem as though burning destroys matter, but the same amount, or mass, of matter still exists after burning wood as before.

Answer

The Law of Conservation of Mass states that matter cannot be created or destroyed, so the weight of the matter is the same. Also suppose you had been able to measure the oxygen used by the fire and the gases produced by the fire. What would you find? The total mass of matter after the fire would be the same as the total mass of matter before the fire.

Answer

When wood burns, it combines with oxygen and changes not only to ashes but also to carbon dioxide and watervapor. The gases float off into the air, leaving behind just the ashes.

Question 18

You tear home your homework into little pieces. How much does the homework weigh after you tear it up?

Accepted Answer

The same

Answer

A little less

Answer

A little more

Answer

None of the above

Question 19

If you mix 1 gram of salt with 50 grams of water, how many grams of matter will you have after the salt is completely dissolved?

Accepted Answer

51 grams

Answer

49 grams

Answer

50 grams

Answer

None of the above

Question 20

Which are clues that a chemical change has taken place?

Accepted Answer

Change in temperature

Accepted Answer

The color changes

Accepted Answer

The odor or smell changes

Accepted Answer

Formation of a precipatate

Accepted Answer

You see bubbles form

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