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Quarterly 1Review -Grade 8-2015-16
Test Description: Review
Instructions: Answer all questions to get your test result.
1) What is the relationship between molecular motion and temperature?
A
As temperature increases, motion increases.
B
As temperature decreases, motion increases and decreases.
C
As temperature decreases, motion does not change.
D
As temperature increases, motion decreases.
2) As thermal energy is added to a substance the space between molecules,
A
expands
B
contracts
C
does not change
D
contracts then expands.
3) The gases hydrogen and oxygen chemically combine to form a liquid. Describe their properties.
A
A compound has different properties than the elements that made it.
B
The compound water has only t he properties of oxygen.
C
A compound has identical properties to the properties that made it.
D
The compound water has only the properties of hydrogen.
4) Which is an example of a chemical change?
A
cutting paper
B
crushing ice
C
mikxing sugar and water
D
burning paper
5) Which is a sign that a chemical reaction occurrred?
A
Heat is produced
B
The substance dissolved in water.
C
The substance has broken into smaller pieces
D
The substance's physical properties do not change.
6) When baking soda and vinegar are mixed together in a sealed container, why doesn't the mass change?
A
Temperature increased
B
Number of molecules did not change.
C
Distance between molecules stayed the same.
D
Volume increased.
7) What should a student do to remain objective in an experiment?
A
Use only data that matches their hypothesis.
B
Analyze all results before arriving at their conclusion.
C
Repeat an experiment until their results match their hypothesis
D
Change their hypothesis to match their data
8) Which does not describe a chemical property?
A
goes from a solid to a gas
B
Does not react with anything.
C
Reacts with bases
D
pH of 12
9) How do elements form compounds?
A
food coloring changes white frosting to red.
B
Water freezes into a solid
C
Iron oxide-rust forms when iron is exposed to oxygen a long time
D
Salt dissolves in water
10) What is a sign of a chemical reaction occurred?
A
formation of bubbles
B
a reduction in total mass
C
disappearance of atoms
D
an increase in the number of atoms
11) What happens to the properties of elements when they become a compound?
A
Elements reacted chemically to form a compound with different properties.
B
Elements reacted chemically to form a compound with the same properties.
C
Elements reacted chemically to form an element with different properties.
D
Elements reacted chemically to form an element with the same properties.
12) As heat energy is added to H2O what happens?
A
Water molecules movement decreases
B
Water molecules stop moving.
C
Water molecules movement increases
D
Water molecules changed every minute.
*select an answer for all questions
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