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8.MS-PS1-5
Test Description: 8.MS-PS1-5
Instructions: Answer all questions to get your test result.
1) According to the Law of Conservation of Mass, matter cannot be created or _____
A
rearranged
B
transferred
C
changed
D
destroyed
2) In a balanced equation, the numbers of _____ on each of side of the equation are equal.
A
coefficients
B
molecules
C
atoms
D
elements
3) In order to demonstrate the Law of Conservation of Mass, a system must be ____
A
closed
B
balanced
C
rearranged
D
open
4) A reaction begins with 15 grams of reactants. What must be true?
A
There must be less than 15 grams of products
B
There must be more than 15 grams of products
C
There might be 15 grams of products
D
There must be 15 grams of products
5) 16 grams of a substance is heated, resulting in two new substances. One measures 10 grams. The other must measure ____
A
16 grams
B
6 grams
C
cannot answer with the information provided
D
10 grams
6) Which statement is true?
A
The Law of Conservation of Mass does not pertain to physical or chemical changes
B
The Law of Conservation of Mass pertains to only physical changes
C
The Law of Conservation of Matter pertains to both physical and chemical changes
D
The Law of Conservation of Mass pertains to only chemical changes
7) Which is a common unit of measurement for mass?
A
liter
B
gram
C
pound
D
Newton
8) What is the difference between an open and closed system?
A
A closed system does not allow for the exchange of matter
B
An open system is much more difficult to set up
C
An open system does not allow for the exchange of matter
D
A closed system is much more difficult to monitor
9) When balancing a chemical equation, what are you allowed to change?
A
the numbers of atoms within molecules
B
the identity of the substances
C
the numbers of entire molecules
D
the elements present
10) It can be difficult to demonstrate the Law of Conservation in an open system because ____
A
a product could be liquid
B
a product could be a solid
C
a product could change color
D
a product could be a gas
*select an answer for all questions
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