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