AnswersPBCSD_Grade_Forgiveness_2003310_Physical Science_S1_2022Changes of State

Physical Properties Answers

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Wax melts when it is heated. Which most likely describes what is true of the result of this reaction?

A
The bonding of the atoms is not the same before and after the change.
B
The wax has the same density before and after the change.
C
The same amount of wax exists before and after the change.
D
The wax cannot be changed back into a solid.
2
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Eugene describes the physical property of a material as “sweet and floral.” What physical property of the material is Eugene most likely observing?

A
boiling point
B
shape
C
hardness
D
odor
3

Serena is mixing a material into a beaker filled with a liquid. She notices that the material seems to disappear into the liquid. What physical property of the material is Serena most likely observing?

A
solubility
B
conductivity
C
magnetism
D
density
4

Which is the property of matter in which a substance can transfer heat or electricity?

A
magnetism
B
conductivity
C
density
D
solubility
5

Which scenario is an example of a physical change?

A
Wood is burned in a campfire and is turned into ash and smoke.
B
A piece of metal is left in the rain and forms rust.
C
Lead is melted into a liquid to form pellets.
D
Yeast turns sugar into energy, water, and carbon dioxide gas.
6

What is an example of a physical change?

A
having less ash than the paper that was burned to form it
B
ice forming and then melting back into water
C
rust having a different identity than the iron it forms on
D
the irreversible reaction of vinegar and baking soda
7

Liquid plastic is frozen in a physical change that increases its volume. What can be known about the plastic after the change?

A
Its mass will increase.
B
Its density will increase.
C
Its mass will remain the same.
D
Its density will remain the same.
8

Which statement about the physical change of liquid water boiling into steam is true?

A
The heat added represents an energy change.
B
The action cannot be reversed.
C
The steam cannot conserve mass.
D
The weight lost represents a mass change.
9

When liquid gold becomes a solid, its particles get closer together. Which best describes what happened to the gold?

A
the conservation of magnetism
B
the change in solubility in a physical change
C
the change in melting point in a physical change
D
the rearrangement of particles in a physical change
10

A soft, silvery-white metal combines with a yellow gas to form a white crystal-like solid. What can be said about this change?

A
The change is a physical change because the yellow gas changed into a solid.
B
The change is a physical change because a new substance was not formed.
C
The change is not a physical change because the color of the metal changed.
D
The change is not a physical change because a new substance was formed.

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