AnswersTX-Integrated Physics and Chemistry A-CRUnit Test

Unit Test — Unit test Answers

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1
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Four students are analyzing four different substances and recording their findings in this table.Which most describes this table?

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A
Leonna has a solid, Xiao and Blake have liquids, and Amir has a gas.
B
Leonna and Amir have gasses, Xiao has a liquid, and Blake has a solid.
C
Leonna has a solid, Xiao has a liquid, Blake has a gas, and Amir made a mistake.
D
Leonna has a solid, Xiao has a liquid, Blake made a mistake, and Amir has a gas.
2
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Which property of physical changes explains why matter is conserved in a physical change?

A
The arrangements of particles do not change, and the bonds between atoms do not break.
B
Mass, not energy, changes in a physical change.
C
Energy and mass change in a physical change.
D
The bonds between atoms do not break; it is only the arrangement that changes.
3

When hydrogen peroxide bubbles, it is undergoing a chemical change. Which statement best describes what is happening?

A
The atoms in hydrogen peroxide are breaking apart and forming new types of molecules.
B
The atoms in hydrogen peroxide are breaking apart and recombining into the original molecules.
C
The molecules of hydrogen peroxide remain intact as new types of molecules form and move out of the liquid.
D
The molecules of hydrogen peroxide remain intact but move more quickly to allow evaporation.
4

Which ranks these materials by the attraction between their atoms from the weakest to the strongest?

A
oxygen gas, liquid water, liquid honey, solid iron ore
B
liquid water, liquid honey, oxygen gas, solid iron ore
C
solid iron ore, liquid honey, liquid water, oxygen gas
D
oxygen gas, liquid honey, liquid water, solid iron ore
5

During which changes of state do atoms that cannot move past one another become free to move?

A
vaporization and sublimation
B
boiling and deposition
C
sublimation and melting
D
condensation and melting
6

Ella makes this table to organize her notes on whether atoms gain or lose energy during the changes of state.

Question illustration
A
freezing, boiling, and melting
B
melting, vaporization, and sublimation
C
sublimation, deposition, and condensation
D
freezing, deposition, and condensation
7

Which example illustrates a chemical change?

A
shredding paper
B
smashing a soda can
C
burning wood
D
chopping wood
8

Which statement gives two characteristics of all liquids?

A
They spread out to fill space and have atoms that vibrate in place.
B
They have atoms that vibrate in place and have a definite shape.
C
They will change shape to fit a container and have definite volume.
D
They have definite volume and have atoms that move freely in all directions.
9

Marco wants to investigate the chemical properties of sodium bicarbonate, or baking soda. He plans to carry out the tests below.Test 1: Mix a teaspoon of sodium bicarbonate into a cup of warm water to see if it dissolves.Test 2: Mix a teaspoon of sodium bicarbonate into a cup of vinegar to see if it fizzes.Test 3: Heat a teaspoon of sodium bicarbonate in the oven to see if its melting point is less than 400 degrees Fahrenheit.

A
Only Test 3 will indicate a chemical property of sodium bicarbonate. Tests 1 and 2 will show a physical property of the substance.
B
Only tests 1 and 2 will indicate chemical properties of sodium bicarbonate. Test 3 will show a physical property of the substance.
C
Only Test 2 will indicate a chemical property of sodium bicarbonate. Tests 1 and 3 will show a physical property of the substance.
D
Only tests 1 and 3 will indicate chemical properties of sodium bicarbonate. Test 2 will show a physical property of the substance.
10

Which state(s) of matter have no definite shape or volume?

A
liquids and solids
B
liquids and gasses
C
gasses
D
solids
11

A cylinder at left with balls in a layer on the bottom of the cylinder has an arrow leading to a cylinder at right with balls stacked near the bottom of the cylinder.

Question illustration
A
Atoms gain energy as a solid changes to a gas.
B
Atoms gain energy as a liquid changes to a gas.
C
Atoms lose energy as a solid changes to a gas.
D
Atoms lose energy as a liquid changes to a gas.
12

The atoms in a sample are close together but can slide past one another. As the atoms lose energy, they move slower. The atoms become locked in place because of attractive forces between them.

A
gas to solid
B
gas to liquid
C
liquid to solid
D
solid to liquid
13

What happens to the total mass of a substance undergoing a physical change?

A
It stays the same.
B
It doubles.
C
It triples.
D
It is reduced.
14

What is conserved in physical changes?

A
shape
B
energy
C
mass
D
density
15

An amount of nitrogen undergoes a physical change and increases its volume. What can be known about this physical change?

A
The boiling point of the nitrogen increased.
B
The mass of nitrogen increased.
C
The color changed.
D
The density changed.

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