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