8.MS-PS1-5 Question Preview (ID: 59638)
8.MS-PS1-5.
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Which statement is true?
a) The Law of Conservation of Matter pertains to both physical and chemical changes
b) The Law of Conservation of Mass pertains to only physical changes
c) The Law of Conservation of Mass pertains to only chemical changes
d) The Law of Conservation of Mass does not pertain to physical or chemical changes
16 grams of a substance is heated, resulting in two new substances. One measures 10 grams. The other must measure ____
a) 16 grams
b) 10 grams
c) cannot answer with the information provided
d) 6 grams
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
In order to demonstrate the Law of Conservation of Mass, a system must be ____
a) open
b) balanced
c) closed
d) rearranged
In a balanced equation, the numbers of _____ on each of side of the equation are equal.
a) elements
b) atoms
c) molecules
d) coefficients
According to the Law of Conservation of Mass, matter cannot be created or _____
a) destroyed
b) rearranged
c) transferred
d) changed
Which is a common unit of measurement for mass?
a) pound
b) gram
c) liter
d) Newton
What is the difference between an open and closed system?
a) An open system does not allow for the exchange of matter
b) An open system is much more difficult to set up
c) A closed system does not allow for the exchange of matter
d) A closed system is much more difficult to monitor
When balancing a chemical equation, what are you allowed to change?
a) the numbers of atoms within molecules
b) the elements present
c) the identity of the substances
d) the numbers of entire molecules
It can be difficult to demonstrate the Law of Conservation in an open system because ____
a) a product could be a gas
b) a product could be liquid
c) a product could be a solid
d) a product could change color
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