1. Changes in matter Physical and Chemical Properties
Physical and Chemical Changes
Observable Features of Chemical Reactions

2. Physical properties used to identify substances
used to classify substances
used to determine effective building materials

3. Examples of physical properties
Elasticity
Hardness
Durability
Texture
Shape
Boiling point
Freezing point
Melting point

4. Chemical Properties used to identify substances
used to classify substances
used to determine
effective building materials
used to determine materials suitable in different environments

5. Examples of chemical properties
Flammable
Non-flammable
Reacts with water
Doesn’t react with water
Corrosiveness
Toxicity
Combustibility

6. Physical change Physical changes……….
are concerned with states of matter
are concerned with energy
form no new substances
include changes in states of matter
Same beginning & ending materials

7. Examples of physical changes
Crushing a can
Melting an ice cube
Breaking a bottle
Boiling water into steam
Forming clay into a sculpture
Physical

8. Chemical change Chemical changes………. happen on a molecular level
make new substances
have indicators that change has taken place
Different beginning & ending materials

9. Examples of chemical changes
Burning logs in a fire
Cooking an egg
Rusting an iron pan
Mixing soda with
vinegar
Exploding fireworks
Chemical

10. Evidence of chemical changes
Change in color
Change in odor
Energy given off
(light, heat, sound)
Gas given off
Precipitate forms

11. Reaction types involving heat
Exothermic reactions (heat is given off) Endothermic reactions (heat is taken in)
Boom!
Fizz!

12. Chemical change rates Heating Cooling Stirring Crushing Concentration
Rates are affected by………….
Heating
Cooling
Stirring
Crushing
Concentration

13. Conservation of matter
Matter – can’t be created or destroyed
(Atoms remain the same but rearrange)
Mass – can’t be created or destroyed
(The amount of matter stays the same)

14. Cellular respiration
This is the opposite equation of Photosynthesis

15. Changes in matter Matter has physical and chemical properties.
Matter can change physically & chemically.
Energy is involved in the changes.
Chemical reactions have observable features.
Matter is conserved in a chemical reaction.