AnswersPhysical ScienceStates and Properties of Matter

Practice Test Answers

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1
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What happens to the total mass of a substance undergoing a physical change?

A
It doubles.
B
It triples.
C
It is reduced.
D
It stays the same.
2
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Justin is an artist using a hammer to make a large, thick statue out of tin. Which property of tin allows Justin to make an interesting shape?

A
conductivity
B
malleability
C
shininess
D
ductility
3

Why do natural polymers not pose as much of an issue in landfills as synthetic polymers?

A
Natural polymers are biodegradable, and synthetic polymers are not biodegradable.
B
Natural polymers are expensive to recycle, and synthetic polymers are cheap to recycle.
C
Natural polymers are not biodegradable, and synthetic polymers are biodegradable.
D
Natural polymers are cheap to recycle, and synthetic polymers are expensive to recycle.
4

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 molecules of hydrogen peroxide remain intact as new types of molecules form and move out of the liquid.
C
The molecules of hydrogen peroxide remain intact but move more quickly to allow evaporation.
D
The atoms in hydrogen peroxide are breaking apart and recombining into the original molecules.
5

Which best describes the behavior of atoms in a solid substance that is melting into a liquid?

A
Atoms that once slid past one another now expand in all directions.
B
Atoms that were once in fixed positions now slide past one another.
C
Atoms that were once in fixed positions now spread freely in all directions.
D
Atoms that once slid past one another now only vibrate in place.
6

What does the chemical formula cap c sub 3 cap h sub 6 cap o sub 2 tell about a molecule of the compound it represents?

A
It is made up of 3 atoms of 11 different elements.
B
It is made up of 11 atoms joined in a straight line.
C
It is made up of 11 total atoms of 3 different elements.
D
It is made up of 1 atom composed of 3 different elements.
7

Which is the only element in group 1 on the periodic table that forms covalent bonds?

A
sodium
B
lithium
C
hydrogen
D
potassium
8

What is conserved in physical changes?

A
mass
B
energy
C
shape
D
density
9

Ricardo finds an online site about the gas laws. The site shows the equation for Charles’s law. cap v sub 1 cap t sub 1 is equal to cap v sub 2 cap t sub 2 What change would correct the error on the site?

A
The symbol for cap t sub 2 should be smaller than for cap t sub 1 because if volume increases, then temperature should decrease.
B
The volume should be divided by temperature on each side of the equation.
C
Each cap t should be replaced by a cap p in the equation because Charles’s law describes changes in volume and pressure.
D
“Charles’s law” should read “Gay-Lussac’s law,” which explains changes in volume and temperature.
10

How do the nuclei of covalently bonded atoms help keep the bond together?

A
Neutral particles in the nucleus can become positive or negative in order to balance the charges.
B
Neutral particles in the nucleus provide enough mass that the force of gravity holds the atoms together.
C
Positive particles in the nucleus change into negative particles that enter electron shells.
D
Positive particles in the nucleus are attracted to shared electrons, so the atoms stay close together.
11

Which example illustrates a chemical change?

A
smashing a soda can
B
shredding paper
C
chopping wood
D
burning wood
12

Which term best describes all atoms in ionic bonds?

A
positively charged
B
negatively charged
C
stable
D
unstable
13

What causes an ionic bond to form between sodium and chlorine?

A
Sodium atoms donate electrons.
B
Sodium and chlorine atoms switch electrons.
C
Sodium atoms gain electrons.
D
Sodium and chlorine atoms share electrons.
14

In which state of matter do atoms only vibrate in place and do not freely move around?

A
liquid
B
solid
C
gas
D
plasma
15

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

A
boiling and deposition
B
vaporization and sublimation
C
sublimation and melting
D
condensation and melting
16

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. Which change of state is taking place?

A
gas to solid
B
liquid to solid
C
gas to liquid
D
solid to liquid
17

How many atoms of each element are in the chemical formula NH sub 4 NO sub 3 ?

A
1 nitrogen, 1 hydrogen, and 3 oxygen
B
1 nitrogen, 4 hydrogen, and 3 oxygen
C
2 nitrogen, 4 hydrogen, and 3 oxygen
D
5 nitrogen, 1 hydrogen, and 1 oxygen
18

Which formula represents Charles’s law?

A
cap p sub 1 cap v sub 1 is equal to cap p sub 2 cap v sub 2
B
cap v sub 1 cap t sub 1 is equal to cap v sub 2 cap t sub 2
C
the fraction with numerator cap v sub 1 and denominator cap t sub 1 is equal to the fraction with numerator cap v sub 2 and denominator cap t sub 2
D
the fraction with numerator cap p sub 1 and denominator cap t sub 1 is equal to the fraction with numerator cap p sub 2 and denominator cap t sub 2
19

Which shows two structures that are made mostly of metal?

A
Image with description An image of a car. An image of a bridge made up of metal and cables.
B
Image with description An image of the Mount Rushmore. An image of a table bell.
C
Image with description An image of the Mount Rushmore. An Image of Eiffel tower.
D
Image with description An image of three sugar cubes. An image of a table bell.
20

Eugene works at a carpet factory. Which natural polymer does he most likely work with to make the carpets?

A
wool
B
nylon
C
silk
D
rubber

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