6/16/14
1) a. Copper has a reddish
brown color. Physical property
b. Propane burns readily. Chemical property
c. Carbon dioxide gas extinguishes a candle
flame. Chemical property
d. Honey pours more slowly than does water.
Physical property
2) a. Metal wire can be bent.
Physical property
b. Ice floats in water. Physical property
c. Paper is flammable. Chemical property
d. Sugar is soluble in water. Physical property
3) a. A candle burns. Chemical change
b. An opened carbonated beverage fizzes. Physical change
c. Hair curls as a result of a “perm.” Physical change
d. As shoes wear out, holes appear in the
soles. Physical change
4) a. A cut apple left out in
the air turns brown. Chemical change
b. Flashlight batteries lose their “charge”
after extended use. Physical change
c. Dry cleaning removes oils from clothing.
Chemical change
d. Italian salad dressing separates into
layers over time. Physical change
5) a. As the apple is
released into the air, oxygen reacts with it turning it brown.
b. The power in the battery decreases and
the chemicals remain the same.
c. A substance needs to be used to dissolve
the oil involving another chemical.
d. The chemicals remain the same.
Make Predictions p.25
Investigation
number
|
Predictions
|
1
|
The paper remains the same
|
2
|
The paper turns into ash
|
3
|
The chemical changes when the ammonia
solution mixes with the universal indicator
|
4
|
The chemical changes when mixed with vinegar
|
5
|
The crystal will physically change and become
powder
|
6
|
The blue powder will become liquid
|
7
|
The tea light will melt and become liquid
|
8
|
The tea light remains the same and the wax melt
a little
|
9
|
The chemicals will change since the baking
soda and vinegar combine
|
10
|
The chemicals will change since the baking
soda and vinegar combine
|
11
|
The chemicals will change since the baking
soda and nitrate solution combine
|
12
|
The different metal object would measure
different volumes
|
13
|
The nail may turn blue due to chemical change
|
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