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Ch 2
Test Description: Physical Science
Instructions: Answer all questions to get your test result.
1) Which of the following is not a pure substance
A
element
B
molecule
C
compound
D
mixture
2) Which of the following is an element
A
salt
B
nylon
C
iron
D
sand
3) A group of atoms that acts as a unit is called a(n)
A
element
B
molecule
C
mixture
D
compound
4) Diamond is know for its
A
hardness
B
reactivity
C
all fo the answers are correct
D
flammability
5) What is the density of a sample liquid that has a volume of 125 mL and a mass of 200 g?
A
0.625 g/mL
B
75 g/mL
C
1.6 g/mL
D
16 g/mL
6) Helium is used in balloons because it is
A
a colored gas
B
flammable
C
reactive with rubber
D
lighter than air
7) An object's volume can be found by dividing its mass by its
A
weight
B
pressure
C
density
D
temperature
8) Which of the following is not a physical property of iron
A
ability to rust
B
melting point
C
conductivity
D
color
9) Which property of a substance is not affected by physical changes?
A
shape
B
position
C
reactivity
D
size
10) The difference substances in a mixture
A
form new molecules
B
keep their properties
C
cannot be separated
D
combine chemically
*select an answer for all questions
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