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8th Grade Ch 1
Test Description: Matter
Instructions: Answer all questions to get your test result.
1) The fact that matter is not created or destroyed in any physical or chemical change is called the
A
law of keeping your matter
B
Newton's law
C
law of conservation of energy
D
law of conservation of mass
2) A measure of how hot or cold something is
A
heat
B
temperature
C
mass
D
thermal energy
3) A change in which energy is absorbed is called a(n)
A
exothermic change
B
physical change
C
chemical change
D
endothermic change
4) The study of matter and how matter changes
A
chemistry
B
physics
C
taxonomy
D
biology
5) A single kind of matter that is pure, or always has a specific makeup
A
compound
B
chemicals
C
substance
D
element
6) A substance that cannot be broken down into any other substances by chemical or physical means
A
element
B
substance
C
compound
D
molecule
7) A force of attraction between two atoms
A
chemical bond
B
magnetic bond
C
physical bond
D
electrical bond
8) How many oxygen atoms are in CO2?
A
1
B
3
C
0
D
2
9) A combination of two or more substances that are together in the same place, but their atoms are not chemically bonded
A
molecule
B
element
C
mixture
D
compound
10) Salt water is an example of a
A
heterogeneous mixture
B
exothermic mixture
C
endothermic mixture
D
homogenous mixture
11) If you went to the Moon, what would change?
A
your mass
B
your density
C
your weight
D
both your weight and your mass
12) The system that scientists use to measure the properties of matter
A
whatever their countries use
B
Google
C
the International Measuring System
D
the International System of Units
13) How much space matter occupies
A
weight
B
density
C
mass
D
volume
14) An object's mass is 12 g and its volume is 6 cm3. What is its density?
A
84 g/cm3
B
2 g/cm3
C
18 g/cm3
D
6 g/cm3
15) A melting popsicle is an example of a
A
all of the above
B
chemical change
C
physical change
D
exothermic change
16) Origami is an example of paper going through a
A
chemical change
B
physical change
17) Combustion is an example of a(n)
A
exothermic change
B
endothermic change
18) A group of two or more atoms held together by chemical bonds
A
element
B
compound
C
molecule
D
atom
19) When elements chemically combine, they form compounds with properties different from those of the elements.
A
true
B
false
20) A homogenous mixture is all of these except
A
difficult to separate
B
can be liquid, gas, or solid
C
so evenly mixed you can't see the parts
D
you can usually see the different parts
*select an answer for all questions
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