64 Matchbox Riddles Chemical vs. Physical Change 65 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 Review

Physical and Chemical Properties When I say “Show Me”, hold up the correct card.

Physical Property OR Chemical Property

Observation

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 shape 2. Mixing or stirring 3. Dissolving 4. Melting, freezing or evaporating

Activity

With 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

Activity

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

Think – Pair - Share

How are physical and chemical change different? (Name 3 things) • Think about how physical and chemical change is different.

• Share your thoughts with a neighbor

66 Matchbox Riddles Create a matchbox for each term below: Outside: riddle/joke Inside: answer Under 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 Chemical vs. Physical Change 67 Make a 2 door foldable. Label the outside tabs: chemical change and physical change Glue on this page, when we are done taking notes

Exit Ticket

Use 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.