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2. Unit 2
Chemistry
Lesson 1:
Describing Matter
Essential Question:
What properties describe matter?

3. What properties describe matter?
Anything that has mass and Matter
takes up space
What are some examples of matter in the classroom?

4. A characteristic of a Physical property
substance that can be
observed without changing it
into another substance

5. What happens to a substance in a physical change?
Physical changes alter the form
or appearance of matter but does not
turn it into a different substance
A butter artist has changed a block of butter into artwork.

6. Examples of physical change
States of matter- liquid, solid or gas
1.) Changes of state
solid liquid (melting)
liquid solid (freezing)
liquid gas (evaporation)

7. A liquid puddle of water can change into water vapor (a gas) and mix with the air.
Snow can change into water (a liquid) by melting.

8. 2.) Changes in shape or form Dissolving Bending Crushing Breaking
Chopping
If you pour a sugar solution into a pan (sugar and water) and let the water dry out the sugar will remain as a crust. The crust is still sugar even though it looks different.

9. A characteristic of a Chemical property
substance that describes
its ability to change
into different
substances
Ability to burn
Ability to rust
Ability to tarnish

10. What happens to a substance in a chemical change?
Chemical changes produce one or more new substances

11. 1.) A single substance breaks down into two or more substances
Hydrogen peroxide breaks down into water and oxygen when it’s poured on a cut.

12. 2.) Two or more substances combine to form different substances
Several compounds combine with energy from the sun to produce new substances in photosynthesis.

13. Examples of chemical change
Burning
Rusting
Tarnishing