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8.MS-PS1-2
Test Description: 8.MS-PS1-2
Instructions: Answer all questions to get your test result.
1) What is different between bubbles due to boiling and bubbles due to a chemical change?
A
The bubbles during boiling are the result of an exothermic reaction
B
The bubbles during boiling are not a new substance
C
The bubbles during boiling represent a chemical change
D
The bubbles during boiling are a new substance
2) Freezing liquid water into ice is a _____ change
A
physical
B
chemical
C
characteristic
D
catalyst
3) Dissolving salt in water is a ____ change
A
chemical
B
characteristic
C
catalyst
D
physical
4) Which of the following is NOT a characteristic property?
A
melting point
B
mass
C
density
D
malleability
5) Which of the following is an example of a physical change?
A
A powder is combined with water and it begins to fizz
B
Sugar is combined with water and it dissolves in the water
C
Two liquids are combined and begin to give off heat
D
A red liquid is combined with a yellow mixture and turns purple
6) What is in the bubbles created during a chemical reaction?
A
heat
B
one of the reactants, just in a different state of matter
C
a new gas
D
the surrounding air
7) The density a gold bar is calculated to be 19.32 g/cm3. If the bar is cut in half, what will be the density of each half?
A
38.64 g/cm3
B
Cannot be answered with the information provided
C
19.32 g/cm2
D
9.66 g/cm3
8) How does the boiling point of a substance change as you increase the volume??
A
it doesn't change
B
it increases
C
it depends on the substance
D
it decreases
9) Which of the following is NOT a physical property?
A
mass
B
density
C
freezing point
D
flammability
10) When saliva starts breaking down food particles, that is a chemical change. Which is the best explanation for why?
A
the food gets mashed down into small pieces
B
the food looks different afterwards
C
the enzyme in saliva breaks bonds within the macromolecules
D
the macromolecules remain intact
*select an answer for all questions
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