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Chemistry Unit Review

Total questions: 117

Worksheet time: 39mins

Name
Class
Date
1.
A measure of how much mass is contained in a given unit of volume.
a)
mass
b)
density
c)
volume
d)
matter
2.
The amount of space something takes up
a)
density
b)
volume
c)
mass
d)
matter
3.
Which of the following is a physical change?
a)
Rotting banana
b)
Cutting paper
c)
Digesting food
d)
A rusting car
4.
Which of the following is a chemical change?
a)
Baking a cake
b)
Folding paper
c)
Ice cream melting
d)
Blowing up a balloon
5.

A(n) ______________________________ mixture is formed when two or more substances are so evenly mixed that you can't see the different parts.

a)

homogeneous

b)

heterogeneous

6.
Chopping wood is an example of a:
a)
Physical change
b)
Chemical change
7.
Water freezing to ice is an example of a:
a)
Physical change
b)
Chemical change
8.
Burning wood to ash is an example of a:
a)
Physical change
b)
Chemical change
9.
Burning wood to ash is an example of a:
a)
Physical change
b)
Chemical change
10.

A single kind of matter that always has a specific composition

a)

substance

b)

mixture

c)

combination

d)

association

11.

Characteristics of substances that can be observed without changing it into another substance.

a)

physical properties

b)

chemical properties

c)

molecular properties

d)

elemental properties

12.

A group of two or more atoms held together by chemical bonds.

a)

molecule

b)

substance

c)

element

d)

nucleus

13.

Weight is the measure of the force of _______ on an object.

a)

gravity

b)

mass

c)

air

d)

molecules

14.

Length x width x height =

a)

volume of a solid

b)

density of a solid

c)

volume of a liquid

d)

density of a solid

15.

The measure of how hot or cold an object is.

a)

temperature

b)

electrolysis

c)

tarnishment

d)

molecular density

16.

Anything that has mass and takes up space is called

a)

mass

b)

matter

c)

volume

d)

weight

17.

The amount of matter in an object is called

a)

mass

b)

matter

c)

volume

d)

weight

18.

__________ is a measure of the gravitational force on an object.

a)

weight

b)

mass

c)

matter

d)

volume

19.

____________ is a measure of the amount of mass in a given volume.

a)

Density

b)

Weight

c)

Volume

d)

Displacement

20.

The formula for density is _______________________.

a)

m x v (mass times volume)

b)

mass / volume (mass divided by volume)

c)

volume / mass (volume divided by mass)

d)

l x w x h (length times width times height)

21.

The study of properties of matter and how matter changes is called

a)

chemistry

b)

physiology

c)

biology

d)

botany

22.

What is the simplest, pure substance that cannot be broken down into another substance?

a)

element

b)

atom

c)

mixture

d)

compound

23.

What are the smallest particles of matter that make up elements?

a)

molecules

b)

compounds

c)

mixtures

d)

atoms

24.

When atoms combine, these types of bonds form.

a)

physical

b)

chemical

25.

When two atoms of the same element combine, they form these

a)

molecules

b)

compounds

c)

mixtures

d)

substances

26.

What is a substance that is made of two or more elements in a set ratio?

a)

Atoms

b)

Compounds

c)

Mixtures

d)

Molecules

27.

What is the law of conservation of mass?

a)

Matter can be made but not destroyed.

b)

Matter can be destroyed but not made.

c)

We can be created and destroyed.

d)

Matter cannot be created or destroyed.

28.

What are the 4 ways to separate mixtures? Check all of the answers you think are correct.

a)

Distillation

b)

Heat

c)

Evaporation

d)

Filtration

e)

Magnetic Attraction

29.

The ratio of hydrogen atoms to sulfur atoms in sulfuric acid is...(use the picture)

a)

2 Hydrogen to 4 Sulfur

b)

1 Hydrogen to 2 Sulfur

c)

2 Hydrogen to 1 Sulfur

d)

1 Hydrogen to 4 Sulfur

30.

A balloon filled with air does not rise as high as a balloon filled with helium. What does this tell you about the density of helium?

a)

Helium is more dense than air.

b)

Helium is less dense than air.

c)

The two gases have the same density.

d)

When heated, helium becomes more dense.

31.

Which of the following statements about the mass of an object is correct?

a)

Mass changes with location.

b)

Mass remains constant.

c)

Mass changes with altitude.

d)

Mass changes with gravity.

32.

The four measurable properties of matter are mass, weight, volume, and...

a)

pressure

b)

gravity

c)

density

d)

kilogram

33.

A(n)___________ change releases energy.

a)

exothermic

b)

endothermic

c)

physical

d)

temporal

34.

A(n) ______________ change absorbs energy.

a)

exothermic

b)

endothermic

c)

physical

d)

temporal

35.
Something that takes up space and has mass.
a)
volume
b)
matter
c)
mass
d)
density
36.
What happens when the motion of particles slows?
a)
The particles split.
b)
The particles move further apart.
c)
The particles move closer together
d)
The particles no longer move randomly.
37.
A gas has a no definite shape and ________.
a)
a definite shape
b)
a definite volume
c)
no definite shape
d)
no definite volume
38.
A liquid has no definite shape and ________.
a)
a definite shape
b)
a definite volume
c)
no definite shape
d)
no definite volume
39.
A solid has ________ and a definite volume.
a)
a definite shape
b)
a definite volume
c)
no definite shape
d)
no definite volume
40.

Measure of the average kinetic energy of the particles in an object

a)

thermal energy

b)

temperature

c)

kinetic energy

41.

Changing from a liquid to a gas

a)

condensation

b)

vaporization

c)

sublimation

d)

melting

42.

Changing from a gas to a liquid

a)

condensation

b)

vaporization

c)

sublimation

d)

melting

43.

Changing directly from a solid to a gas

a)

condensation

b)

vaporization

c)

sublimation

d)

melting

44.

Evaporation and boiling are two kinds of _______

a)

condensation

b)

vaporization

c)

sublimation

d)

melting

45.

Vaporization that occurs within a liquid is _________

a)

boiling.

b)

evaporation.

c)

sublimation.

d)

condensation.

46.

Solid particles are able to...

a)

Move around

b)

Move in random directions

c)

Vibrate in a fixed position

d)

Be compressed

47.

What is the name given to a substance changing state from a liquid to a solid?

a)

Boiling

b)

Condensation

c)

Melting

d)

Freezing

48.

The reason that liquids can take the shape of the container that they are in is because...

a)

The particles have a random structure

b)

The particles have space between them

c)

The particles can move around each other

d)

The particles are closer together so take up less space

49.
What state of matter consists of tightly packed atoms?
a)
Solid
b)
liquid
c)
gas
d)
plasma
50.
When pressure increases, which of the following also increases?
a)
mass
b)
volume
c)
temperature
d)
length
51.
Adding thermal energy to matter casues its particles to _________________.
a)
move slower
b)
move faster
c)
melt
d)
feeze
52.

A solid

a)

has particles that are far apart

b)

has a size and shape of its own

c)

takes the shape of its container

53.

An inverse relationship is when:

a)

both go up or both go down

b)

one goes up and the other goes down

c)

sometimes they both go up and sometimes one goes up and the other goes down

d)

they both only go down

54.

A substance's ________________ is when it changes from a liquid to a gas

a)

boiling point

b)

melting point

c)

freezing point

d)

triangle point

55.

Boyle's law tells us that when volume increases at a constant temperature.........

a)

temperature decreases

b)

pressure increases

c)

pressure decreases

d)

temperature increases

56.

Charles' Law tells us that when temperature increases at a constant pressure.......

a)

volume decreases

b)

volume increases

c)

pressure decreases

d)

pressure increases

57.

What is the resistance of a liquid to flowing?

a)

surface tension

b)

viscosity

c)

sublimation

d)

condensation

58.

What is an inward pull, or force, among the molecules in a liquid that brings the molecules on the surface closer together?

a)

viscosity

b)

surface tension

c)

sublimation

d)

condensation

59.

What type of solid does not have a distinct particle pattern and does not have a distinct melting point?

a)

amorphous solid

b)

crystalline solid

c)

amazing solid

d)

sublime solid

60.

What type of solid has a distinct particle pattern and a distinct melting point?

a)

amorphous solid

b)

crystalline solid

c)

amazing solid

d)

sublime solid

61.

A directly proportional relationship is when:

a)

both go up or both go down

b)

one goes up and the other goes down

c)

sometimes they both go up but sometimes one goes up and the other goes down

62.

If you have a sealed container filled with gas in a sunny room, what happens to the gas in the container as the room gets hotter?

a)

The gas slows down.

b)

The gas starts to form bonds.

c)

The gas moves faster.

d)

The gas changes state.

63.
Protons are located in the nucleus of the atom. A proton has
a)
No charge
b)
A negative charge
c)
A positive and negative charge
d)
A positive charge
64.
The electrons on the outermost energy level of an atom are called valence electrons.
a)
True
b)
False
65.
Neutrons are in the nucleus of the atom. A neutron has
a)
A positive charge
b)
No charge
c)
A negative charge
d)
twice as much positive charge as a proton
66.
In the process of ionic bonding, ions come together because
a)
Opposite charges repel
b)
Positive and negative ions attract
c)
Salt is magnetic
d)
Like charges attract each other
67.

If an atom gains an electron, then the atom will become _____________________.

a)

a positive ion.

b)

a negative ion.

c)

a neutral atom.

d)

an isotope.

68.

If an atom is neutral, it has an equal number of ________________________ and ______________________________.

a)

electrons and neutrons.

b)

protons and neutrons.

c)

protons and electrons.

d)

protons, neutrons, and electrons.

69.

In the following process, Na --> Na+ what has taken place?

a)

loss of a proton

b)

gain of a proton

c)

loss of an electron

d)

gain of an electron

70.

How many atoms are in the chemical formula FeC5O5?

a)

5

b)

11

c)

15

d)

26

71.

The number of ________________ in the atom of an element determines its chemical properties.

a)

Protons

b)

Neutrons

c)

Valence Electrons

d)

Atomic Number

72.

How can you find the number of protons an atom of an element has?

a)

Looking at its atomic mass.

b)

Looking at its charge.

c)

Looking at its atomic number.

d)

Looking at the number of neutrons.

73.

Ions that are made of more than one atom are called_____________.

a)

ionic compounds

b)

crystals

c)

polyatomic atoms

d)

ionic bonds

74.

Which of the following is the correct name for MgCl2 (the 2 is subscripted)

a)

magnesium chloride

b)

magnesium chlorine

c)

magnesium dichlorine

d)

magnesium dichloride

75.

In order to have a stable arrangement of 8 valence electrons, metal atoms are likely to _____________ electrons.

a)

gain

b)

take

c)

bond

d)

lose

76.

Because the force of attraction between the positive and negative ions is so strong, ionic compounds have ______________ melting points.

a)

low

b)

neutral

c)

high

d)

odd

77.

In an electron do diagram, two pairs of shared electrons represents a __________________.

a)

single bond

b)

double bond

c)

triple bond

d)

quadruple bond

78.

Compared to ionic compounds, molecular compounds generally have...

a)

good conductivity

b)

greater densities

c)

more chemical bonds

d)

a low boiling point

79.

Compared to ionic compounds, molecular compounds generally have...

a)

stronger chemical bonds

b)

poor conductivity

c)

a high melting point

d)

lower densities

80.

Covalent bonds usually form when a nonmetal combines with a(n) _________________.

a)

halogen

b)

metal

c)

nonmetal

d)

alkali

81.

A(n) ____________ is a neutral group of atoms joined by covalent bonds.

a)

ion

b)

compound

c)

ionic compound

d)

molecule

82.

How is a periodic table organized?

a)

Increasing by atomic number.

b)

By the number or energy levels in an atom.

c)

By the number of valence electrons in an atom.

d)

All of these choices.

83.

Group 18 on the periodic table has 8 valence electrons making them stable. What is this group called?

a)

Alkali Metals

b)

Metalloids

c)

Halogens

d)

Noble Gases

84.

Where would you find this element on the periodic table?

a)

Group 1 Period 4

b)

Group 4 Period 3

c)

Group 14 Period 3

d)

Group 3 Period 14

85.

When an atom loses a valence electron, it becomes a(n) _____________________ ion.

a)

negative

b)

positive

c)

neutral

d)

overcharged

86.

A nitrogen molecule has one triple bond. How many electrons do the nitrogen atoms share?

a)

2

b)

8

c)

4

d)

6

87.

If a molecule contains polar bonds, the molecule ______________ be polar overall.

a)

is going to be

b)

may or may not be

c)

is not going to be

88.

According to the Law of Conservation of Mass,

a)

matter is always created in a chemical reaction

b)

matter is always destroyed in a chemical reaction

c)

matter is created and then destroyed in a chemical reaction

d)

matter is not created or destroyed in a chemical reaction

89.

Examine the following chemical reaction: H20 + CO2 → C6H12O6 + O2 What are the reactants?

a)

H20 + CO2

b)

→

c)

C6H12O6 + O2

d)

H20 + CO2 → C6H12O6 + O2

90.

Examine the following chemical reaction: H20 + CO2 → C6H12O6 + O2 What are the products?

a)

H20 + CO2

b)

→

c)

C6H12O6 + O2

d)

H20 + CO2 → C6H12O6 + O2

91.

Examine the following chemical reaction: H2O2 → H2O + O2 What are the products?

a)

H2O2

b)

→

c)

H2O + O2

d)

H2O2 → H2O + O2

92.

Examine the following chemical reaction: H2O2 → H2O + O2 What are the reactants?

a)

H2O2

b)

→

c)

H2O + O2

d)

H2O2 → H2O + O2

93.

Substances that start a chemical reaction are known as the

a)

reactants

b)

products

c)

chemicals

d)

substances

94.

Substances created, or made, during a chemical reaction are known as the

a)

reactants

b)

products

c)

chemicals

d)

substances

95.

In which of the following examples has a chemical reaction occurred?

a)

After putting liquid batter into a hot pan, the batter solidifies and begins to turn brown.

b)

After turning on a blender filled with fruits, the fruit is chopped up and mixed together.

c)

After taking a tray filled with ice cubes out of the freezer, the cubes begin to melt.

d)

After adding a spoonful of sugar to a mug of hot coffee, the sugar dissolves completely.

96.

An gel ice pack getting cold after you put it in the freezer for an hour.

a)

Chemical Change

b)

Physical Change

97.
Which of the following IS a physical change?
a)
Getting a haircut
b)
Rusty metal
c)
sour milk
d)
A compound
98.

How is a chemical change different from a physical change?

a)

there is no difference

b)

a physical change creates a new substance

c)

a chemical change creates a new substance

99.
Which of the following is a chemical change?
a)
the rusting of iron
b)
dissolving salt in water
c)
melting an ice cube
d)
bending a copper wire
100.
In an endothermic reaction, heat is ...
a)
taken in or absorbed
b)
given out or released 
101.

_____ reactions usually feel hot!

a)

endothermic

b)

exothermic

102.

How does a catalyst work in speeding up a reaction?

a)

By lowering the activation energy or reaction

b)

by giving them more energy

c)

by making them more available

103.

The minimum amount of energy needed for colliding particles to react is called the

a)

Chemical Energy

b)

Kinetic Energy

c)

Activation Energy

d)

Potential Energy

104.

What is the name given to a catalyst in the human body?

a)

Biology

b)

Catalyst

c)

Chemical

d)

Enzyme

105.

2Al+Fe2O3→ 2Fe+Al2O32Al+Fe_2O_3→\ 2Fe+Al_2O_3  is an example of what type of reaction?

a)

replacement

b)

decomposition

c)

synthesis

d)

double replacement

106.

A number written in front of a chemical formula is a(n) ____________________.

a)

subscript

b)

superscript

c)

product

d)

coefficient

107.

Substances formed as a result of a chemical reaction are called...

a)

catalysts

b)

precipitates

c)

products

d)

reactants

108.

The ability to react with oxygen is an example of a ____________________.

a)

physical property

b)

physics

c)

chemical property

d)

state of matter

109.

In an exothermic reaction, products have ____________ energy than the reactants.

a)

more

b)

the same

c)

greater

d)

less

110.

Which of the following are ways to tell if a chemical reaction has occurred?

a)

Gas Production

b)

All choices are correct

c)

Precipitate is formed

d)

Color has changed

111.

Increasing the surface area of the reactants will _____________ the rate of the reaction.

a)

decrease

b)

increase

c)

not affect

d)

destroy

112.

The amount of a substance in a given volume is the _________________ of the substance.

a)

concentration

b)

surface area

c)

catalyst

d)

inhibitor

113.

A(n) ____________ decreases the rate of a reaction.

a)

inhibitor

b)

enzyme

c)

catalyst

d)

block chain

114.

Increasing the temperature of a reaction will ____________ the rate of the reaction.

a)

increase

b)

decrease

c)

not change

d)

adversely affect

115.

What is necessary for a chemical reaction to get started?

a)

products form

b)

a catalyst is present

c)

minimum amount of activation energy is reached

d)

gases combine with solids

116.

How does the law of conservation of mass explain why chemical equations must be balanced?

a)

The compounds involved have to be present on both sides.

b)

The molecules have to be the same because they cannot break apart

c)

The compounds are rearranged to make it look equal

d)

The atoms of each element involved cannot be created nor destroyed.

117.

The production of carbon dioxide during the burning of a fuel is an example of a(n) __________________ reaction.

a)

physical

b)

synthesis

c)

replacement

d)

decomposition

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