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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
transferred
B
changed
C
rearranged
D
destroyed
2) In a balanced equation, the numbers of _____ on each of side of the equation are equal.
A
elements
B
molecules
C
atoms
D
coefficients
3) In order to demonstrate the Law of Conservation of Mass, a system must be ____
A
balanced
B
closed
C
open
D
rearranged
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 must be 15 grams of products
D
There might 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
cannot answer with the information provided
C
10 grams
D
6 grams
6) Which statement is true?
A
The Law of Conservation of Mass pertains to only physical changes
B
The Law of Conservation of Matter pertains to both physical and chemical changes
C
The Law of Conservation of Mass does not pertain to physical or 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
Newton
B
liter
C
pound
D
gram
8) What is the difference between an open and closed system?
A
An open system does not allow for the exchange of matter
B
A closed system does not allow for the exchange of matter
C
A closed system is much more difficult to monitor
D
An open system is much more difficult to set up
9) When balancing a chemical equation, what are you allowed to change?
A
the identity of the substances
B
the elements present
C
the numbers of entire molecules
D
the numbers of atoms within molecules
10) It can be difficult to demonstrate the Law of Conservation in an open system because ____
A
a product could be a solid
B
a product could be liquid
C
a product could change color
D
a product could be a gas
*select an answer for all questions
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