1. Under the document camera
September Day 1
1. Please have these
Items on your desk.
Science Starters
Sheet
Notebook
Agenda
Science Starter:
Under the document camera

2. Table of Contents Update . . . . .
Page / Physical/Chemical
Changes & Properties

3. Physical versus Chemical Properties

4. Reviewing MATTER Matter: anything that has mass and takes up space
Mass – the amount of matter in something
Volume – the amount of space something occupies
Which of the following is matter?
A car?
A box?
You?

5. What is a property?
Property: a characteristic of a substance that can be observed

6. Matter can be changed two ways
Physically
Physical reaction
Physical change
Chemically
Chemical reaction
Chemical change

7. Physical Property
Physical property: a property that can be observed without changing the identity of the substance.
Examples:
luster
malleability: the ability to be hammered into a thin sheet
ductility: the ability to be stretched into a wire
melting point
boiling point
density
solubility
specific heat

8. Special Physical Properties
Melting point: the temperature at which a substance changes from a solid to a liquid at a given pressure
Boiling point: the temperature at which a substance changes from a liquid to a gas at a given pressure
water = 100oC

9. Physical Changes Do NOT CHANGE THE TYPE OF MATTER
Nothing new or different is formed
Could be a change in:
A. Size
B. Change in state
C. Color
D. Shape

10. Examples of Physical Changes
A. Boiling
B. Freezing
C. Dissolving
D. Breaking
E. Making a mixture 2 or more types of matter (substances) mixed together
Not in specific amounts
Can be separated physically

11. Chemical Properties
Chemical property: a property that can only be observed by changing the identity of the substance
Examples:
flammability
ability to rust
reactivity with vinegar

12. Picture from www.chem4kids.com
Chemical Changes
The composition of the substance changes.
The substances present at the beginning of the change are not present at the end; new substances are formed. The change cannot be “undone.”
Picture from

13. Evidence of Chemical Reactions
Chemical Reaction: The process by which the atoms of one or more substances are rearranged to form different substances.
Temperature change
Color change
Gas or solid appears