Physical Properties. Mrs. Johnson's Class. What is the BIG idea. Matter has properties that can be changed by Physical and chemical processes. Physical Properties. Characteristics you can observe without changing the identity of the substance. Color. Size. Shape.
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Mrs. Johnson's Class
Ice is water in a solid state.
Which ball takes up more space? Which ball has the most mass? Which of these ball do you think is the most densest?
To the top.
To the bottom.
The purple circles represent how much space that is available (volume) the black stars represent the amount of matter in that space.
D * V
Piece of Gold
What Changed? The shape of the substance
What didn’t Change? The fact that it is still gold
An apple changes the shape of
The apple but NOT the identify of
The apple .
New section in your table of contents and your notes
Wood or a piece of iron?
The ability of 2 or more substances combined and form one or more substances
After you bake the batter you come up with something totally different.
It is hard to observe unless it is actually happening.
Example: You can see if wood is flammable by burning it.
Determines whether a chemical change will happen
Chemical Change alters the substance.
Wood burned turns to ashes ( something totally different)
Very difficult to reverse a chemical change. You can’t unbake a cake back to the original ingredients.
1.Why is burning wood a chemical change?
2.Is popping popcorn a physical or chemical change explain your reasoning.