AnswersPhysical ScienceProperties and Changes of Matter

Practice Test Answers

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1
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Which statement provides the best assessment of his tests?

A
Only Test 2 will indicate a chemical property of sodium bicarbonate. Tests 1 and 3 will show a physical property of the substance.
B
Only Test 3 will indicate a chemical property of sodium bicarbonate. Tests 1 and 2 will show a physical property of the substance.
C
Only tests 1 and 3 will indicate chemical properties of sodium bicarbonate. Test 2 will show a physical property of the substance.
D
Only tests 1 and 2 will indicate chemical properties of sodium bicarbonate. Test 3 will show a physical property of the substance.
2
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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 recombining into the original molecules.
B
The molecules of hydrogen peroxide remain intact but move more quickly to allow evaporation.
C
The atoms in hydrogen peroxide are breaking apart and forming new types of molecules.
D
The molecules of hydrogen peroxide remain intact as new types of molecules form and move out of the liquid.
3

What is conserved in physical changes?

A
shape
B
energy
C
density
D
mass
4

Which statement best describes balancing equations and the law of conservation of mass?

A
There are fewer atoms in the reactants than in the products, and the total mass is less in the reactants than in the products.
B
The number of atoms is the same in the reactants and in the products, and the total mass is the same in the reactants and in the products.
C
There are more atoms in the reactants than in the products, and the total mass is higher in the reactants than in the products.
D
There are more atoms in the reactants than in the products, and the total mass is the same in the reactants and in the products.
6

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

A
It doubles.
B
It is reduced.
C
It stays the same.
D
It triples.
7

The equation for water is cap h sub 2 plus cap o sub 2 rightarrow cap h sub 2 cap o To balance the equation, which coefficient should be placed in front of cap h sub 2 and cap h sub 2 cap o ?

A
1
B
2
C
3
D
4
8

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

A
solids
B
liquids and gasses
C
liquids and solids
D
gasses
9

Why is matter so diverse in its properties and characteristics?

A
When atoms are split, new matter will be created.
B
Matter consists of various atoms that are chemically identical.
C
The size of atoms in matter depends on their temperature.
D
Different combinations of various atoms result in a wide range of matter.
10

Which best describes what is made of matter?

A
all living things
B
all living things and objects
C
all atoms
D
all solid objects and atoms
11

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

A
condensation and melting
B
vaporization and sublimation
C
sublimation and melting
D
boiling and deposition
12

Which statement gives two characteristics of all liquids?

A
They have atoms that vibrate in place and have a definite shape.
B
They spread out to fill space and have atoms that vibrate in place.
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.
13

What else is produced during the replacement reaction of magnesium and hydrochloric acid? Mg plus 2 HCl rightarrow cap h sub 2 plus ______

A
MgCl
B
MgCl sub 2
C
Mg sub 2 Cl sub 2
D
Mg sub 2 Cl
14

If a person has the values for an object’s density and volume, what value can be calculated?

A
the object’s mass
B
the object’s size
C
the amount of space the object takes up
D
the shape the object forms in a container
15

Which tools would Sara use to find an irregularly shaped object’s mass and volume?

A
a meter stick, a ruler, and water
B
a balance, water, and a ruler
C
a balance, water, and a beaker
D
a meter stick, a balance, and water
16

Which changes of state should she place in the column titled "Lose Energy"?

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

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