64 65Matchbox Riddles

Chemical vs. Physical Change

Make a 2 door foldable. Label the outside tabs: chemical change and

physical change

Glue on this page, when we are done taking notes

Let’s ReviewPhysical and Chemical Properties

When I say “Show Me”, hold up the correct card.

Physical Property OR Chemical PropertyObservation

1. Copper turns green when exposed to the environment.

2. Oxygen is odorless and colorless.

3. The piece of metal is magnetic.

4. The density of water is 1.0 g/ml.

5. Diamonds are a very hard substance.

6. The tree is 8 meters high.

7. Sodium reacts very easily with other elements.

8. Water is a liquid.

9. Baking soda reacts with vinegar.

10. Alka-Seltzer tablets react with water to produce gas.

Physical and Chemical Change

Matter changes…• All around you matter is changing (2 kinds)

a. Chemical Change b. Physical Change

Physical Change

Recap Video – Physical Change

• The appearance may change but the material is still the same

• Easily Reversible

• Physical Change includes:1. Change in state, size or shape2. Mixing or stirring3. Dissolving4. Melting, freezing or evaporating

ActivityWith a partner, which of the following are physical changes?

Chemical Change

Recap Video – Chemical Change

• A chemical reaction causes a new substance to be made

• Hard to reverse

• Signals:– Gas produced– Light created– Color change– Temperature change

ActivityWith a partner, which of the following are chemical changes?

Think – Pair - Share

• Think about how physical and chemical change is different.

• Share your thoughts with a neighbor

How are physical and chemical change different? (Name 3 things)

66 67Matchbox Riddles

Chemical vs. Physical Change

Make a 2 door foldable. Label the outside tabs: chemical change and

physical change

Glue on this page, when we are done taking notes

Create a matchbox for each term below:

Outside: riddle/jokeInside: answerUnder flap: picture

Use at least 4 colors. Glue each one on this page, when you are done

Terms:Physical change, chemical change, physical property, chemical property

Exit TicketUse a post-it to answer the following 2 questions.

1. Which process is an example of a physical change?

a. Wood burning

b. Iron rusting

c. Ice melting

d. Milk souring

2. Which event is a chemical change?

a. The baseball strikes the roof.

b. The roof of the car dents.

c. The paint cracks and chips.

d. The exposed metal rusts.