1. What types of changes can matter undergo?
A substance has characteristic properties such as density, a boiling point, melting point & solubility.

2. Matter can change phases permanently or temporarily.
Temporary changes are called PHYSICAL changes.
Permanent changes are called CHEMICAL changes.
Matter can undergo physical changes which affect only physical properties. Physical changes can involve changes in energy.
Investigate the physical properties of pure substances in terms of unique temperatures at which each substance undergoes state changes.
Investigate the melting and freezing points of a pure substance

3. Physical Changes

4. Structure of water Structure of ice Structure of steam
Matter can undergo physical changes which affect only physical properties. Physical changes can involve changes in energy.
Investigate the physical properties of pure substances in terms of unique temperatures at which each substance undergoes state changes.

5. Physical Changes PHYSICAL CHANGE
When a physical property (like the phase of water) is altered we called it a
PHYSICAL CHANGE
In other words: A physical change involves a change in physical properties (shape, size, density, etc.)
It takes a physical change to change water to steam, or ice to liquid.
Matter can undergo physical changes which affect only physical properties. Physical changes can involve changes in energy.
Investigate the physical properties of pure substances in terms of unique temperatures at which each substance undergoes state changes.

6. Physical Changes
Physical Changes: only the phase changes, the substance does not.
Physical changes usually change the size or shape of the substance.
Matter can undergo physical changes which affect only physical properties. Physical changes can involve changes in energy.
Investigate the physical properties of pure substances in terms of unique temperatures at which each substance undergoes state changes.

7. Physical Changes Examples of physical changes include: Melting Point
Matter can undergo physical changes which affect only physical properties. Physical changes can involve changes in energy.
Investigate the physical properties of pure substances in terms of unique temperatures at which each substance undergoes state changes.
The ice cream is melted but it is still ice cream. It still tastes like ice cream.

8. Physical Changes Examples of physical changes include: Shape
Matter can undergo physical changes which affect only physical properties. Physical changes can involve changes in energy.
Investigate the physical properties of pure substances in terms of unique temperatures at which each substance undergoes state changes.
The shape of the wood changes when it is made into a desk, but it is still wood.

9. Physical Changes Examples of physical changes include: Freezing Point
Matter can undergo physical changes which affect only physical properties. Physical changes can involve changes in energy.
Investigate the physical properties of pure substances in terms of unique temperatures at which each substance undergoes state changes.
The glass of water is frozen, but it is still water (H20)

10. Physical Changes Physical Changes can be caused by changes in energy.
Matter can undergo physical changes which affect only physical properties. Physical changes can involve changes in energy.
Investigate the physical properties of pure substances in terms of unique temperatures at which each substance undergoes state changes.

11. Physical Changes Physical Changes can be caused by changes in energy.
Matter can undergo physical changes which affect only physical properties. Physical changes can involve changes in energy.
Investigate the physical properties of pure substances in terms of unique temperatures at which each substance undergoes state changes.

12. chemical Changes
Matter can undergo physical changes which affect only physical properties. Physical changes can involve changes in energy.
Investigate the physical properties of pure substances in terms of unique temperatures at which each substance undergoes state changes.
Investigate the melting and freezing points of a pure substance

13. Chemical Changes
Chemical Change: a change that creates a NEW material.
(A change in chemical properties)
The original materials are changed into something different.
Typically irreversible
Matter can undergo physical changes which affect only physical properties. Physical changes can involve changes in energy.
Investigate the physical properties of pure substances in terms of unique temperatures at which each substance undergoes state changes.

14. Chemical Changes
Common examples of chemical changes that you may be somewhat familiar with are; digestion, respiration, photosynthesis, burning, and decomposition.
Matter can undergo physical changes which affect only physical properties. Physical changes can involve changes in energy.
Investigate the physical properties of pure substances in terms of unique temperatures at which each substance undergoes state changes.

15. Chemical Changes Examples of chemical changes include: burning
Matter can undergo physical changes which affect only physical properties. Physical changes can involve changes in energy.
Investigate the physical properties of pure substances in terms of unique temperatures at which each substance undergoes state changes.
Once the wood is burned, it is changed forever.

16. Chemical Changes Examples of chemical changes include: rusting
Matter can undergo physical changes which affect only physical properties. Physical changes can involve changes in energy.
Investigate the physical properties of pure substances in terms of unique temperatures at which each substance undergoes state changes.
The rusty spoon cannot be changed back.

17. Chemical Changes Examples of chemical changes include: cooking
Matter can undergo physical changes which affect only physical properties. Physical changes can involve changes in energy.
Investigate the physical properties of pure substances in terms of unique temperatures at which each substance undergoes state changes.
Once the egg is fried, it can not be changed back to the raw egg.

18. Physical vs. Chemical Changes
Matter can undergo physical changes which affect only physical properties. Physical changes can involve changes in energy.
Investigate the physical properties of pure substances in terms of unique temperatures at which each substance undergoes state changes.

19. Let’s Summarize
All matter has physical properties and chemical properties.
Physical properties can change, but the structure of the matter does NOT change
Chemical properties lead the way to chemical changes.
Chemical changes make new substances.
Matter can undergo physical changes which affect only physical properties. Physical changes can involve changes in energy.
Investigate the physical properties of pure substances in terms of unique temperatures at which each substance undergoes state changes.