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Unit Test 1- Matter And Chemistry Part 4
Test Description: Matter and Chemistry Unit Test part 4
Instructions: Answer all questions to get your test result.
1) Identify the statement that explains the difference between mixtures and compounds
A
a mixture is a chemically combined substance but a compound is not
B
a compound is a chemically combined substance, but a mixture is not
C
the substances in a mixture do not keep their original properties
D
A mixture is always the same throughout
2) How is a homogenous mixture different from a heterogenous mixture?
A
the substances in a homogenous mixture do not keep their original properties
B
A homogenous mixture is the same throughout
C
You can see all the different parts of a homogenous mixture
D
a homogenous mixture is formed of chemical bonds
3) Which statement best explains why silver nitrate is a compound?
A
silver nitrate forms a colorless liquid when mixed with water
B
silver nitrate does not chemically react with water
C
silver nitrate forms when three elements chemically combine
D
silver nitrate is a colorless powder
4) Which property of metals allows for us to stick pictures to the refrigerator that will not fall off?
A
reactivity
B
magnetism
C
malleability
D
ductility
5) What is a synthetic element?
A
an element that only occurs in nature
B
an element that can only be produced in a laboratory
C
an element that is almost fully used up
D
an element that is believed to exist but has not yet been discovered
6) A diatomic molecule has how many atoms of the same element?
A
3
B
4
C
5
D
2
7) The boiling point describes the temperature at which:
A
a liquid changes to a gas
B
a liquid changes to a solid
C
a solid changes to a liqiuid
D
a solid changes directly to a gas
8) When marshmallows are burned, they turn black. This is an example of:
A
a homogenous mixture
B
a chemical change
C
a heterogenous mixture
D
a physical change
9) How is a physical change different from a chemical change?
A
A physical change can easily be reversed
B
a physical change results in a new substance being formed
C
A physical change always results in change of color
D
A physical change can not be reversed
10) Which factor best explains why some people will develop cancer while others will not when exposed the same high levels of a harmful chemical?
A
concentration of the chemical
B
potency of the chemical
C
individual exposure
D
individual suscepitibility
*select an answer for all questions
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