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Worksheetschemical and physical changes vol.3
Total questions: 17
Worksheet time: 36mins
Name
Class
Date
1.
Which of the following tells you that a chemical change may have occurred?
a)
Change Shape
b)
Melting
c)
Vaporizing
d)
Change in color
2.
What happens in ALL chemical changes?
a)
Change in state of matter
b)
A new substance is formed
c)
Bubbles are produced
d)
An explosion
3.
Is wood burning a physical or chemical change?
a)
Physical
b)
Chemical
4.
Is milk going sour a physical or chemical change?
a)
Physical
b)
Chemical
5.
Is Gatorade powder dissolving in water physical or chemical change?
a)
Physical
b)
Chemical
6.
Is mold growing on cheese a physical or chemical change?
a)
Physical
b)
Chemical
7.
Is making orange juice a physical or chemical change?
a)
Physical
b)
Chemical
8.
Is sharpening a pencil a physical or chemical change?
a)
Physical
b)
Chemical
9.
Is copper tarnishing a physical or chemical change?
a)
Physical
b)
Chemical
10.
Is the formation of the grand canyon a physical or chemical change?
a)
Physical
b)
Chemical
11.
Which of the following is a reactant
a)
CH4
b)
H2O
c)
CO2
d)
2H2O
12.
In an exothermic reaction, energy is _________.
a)
Released
b)
Absorbed
c)
Stored
d)
Doubled
13.
During Photosynthesis energy is absorbed. What kind of reaction is it?
a)
Physical
b)
Exothermic
c)
Endothermic
d)
Photothermic
14.
The Law of Conservation of Mass tells us matter can't ______________.
a)
change color
b)
change state of matter
c)
be created or destroyed
d)
change temperature
15.
Which of the following is not a clue that a chemical reaction has taken place?
a)
Changing size
b)
Changing color
c)
A gas being formed
d)
Formation of a precipitate
16.
Which of the following IS a clue that a chemical change has occurred?
a)
State of matter change
b)
Size Change
c)
Change in temperature
d)
Shape change
17.
In a chemical reaction, how do the reactants compare to the products?
a)
They are the same
b)
They are different
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