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8th Grade Midterm Review

Total questions: 161

Worksheet time: 2hrs 29mins

Name
Class
Date
1.
The number 6.02 x 1023 is called...
a)
Obama's number
b)
Bohr's number
c)
Trump's number
d)
Avogadro's number
2.
The amount of matter in an object is 
a)
pressure
b)
weight
c)
mass
d)
force
3.

Units used to measure Mass of an object

a)

Centimeters

b)

Milliliters

c)

Grams

4.

What is the name of this metric tool?

a)

Triple Beam Balance

b)

Graduated Cylinder

c)

Massometer

5.

Find the mass.

a)

550.4 g

b)

559.4 g

c)

550.6 g

6.

Find the mass.

a)

285.3 g

b)

275.5 g

c)

275.3 g

7.

What statement is true?

a)

Mass never changes. Weight does.

b)

Weight never changes. Mass does.

c)

Both mass and weight change because they are affected by gravity.

d)

Neither mass nor weight change. They are always the same.

8.

What do you use to measure the mass of an object?

a)
b)
c)
d)
9.

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

a)

Density

b)

Mass

c)

Matter

d)

Gravity

e)

Velocity

10.

What unit of measurement is used for mass in physics?

a)

Liters

b)

Kilograms

c)

Meters

d)

Kelvins

e)

Newtons

11.

6) Which measurement would be different if you were on the Moon versus on Earth?

a)

Mass

b)

Weight

12.

The law of _________ of mass states that the mass of a closed system must remain constant over time.

a)

Weight

b)

Density

c)

Consistency

d)

Elasticity

e)

Conservation

13.

The common tool used to measure length is the

a)

graduated cylinder.

b)

thermometer.

c)

stopwatch.

d)

meter stick.

14.

An accepted international system of measurement, also known as SI units, is the

a)

International System of Units

b)

System of International Measurements

c)

System of Intellectual Units

d)

Units of International Measurement

15.

The basic unit of volume in the metric system is

a)

gram.

b)

liter.

c)

second.

d)

meter.

16.

How many centimeters are in a meter

a)

1000

b)

10

c)

100

d)

1

17.
Which of the following pairs of physical quantity and SI unit is correct ?
a)

Mass - SI unit : kilogram

b)
Time - SI unit : Hour
c)
Electric current - SI unit : Volt
d)

Temperature - SI unit : Celcius

18.
Standard measurement system based on the number 10
a)
Metric System
b)
International System of Units (SI)
c)
Density
d)
Weight
19.

What is volume?

a)

the measure of the force of gravity

b)

a measure of the energy of motion of the particles in a substance

c)

the amount of space taken up by an object or substance

d)

the measure of how much mass is contained in a given space

20.

What is the SI unit for length?

a)

m

b)

N

c)

kg

d)

ml

21.

In our chemistry lab, what unit would you use to measure temperature?

a)

Kelvin (K)

b)

Celsius (C)

c)

Fahrenheit (F)

22.

In our chemistry lab, what unit would you use to measure length?

a)

meter (m)

b)

inch (in)

c)

centimeter (cm)

23.

What is the SI base unit for amount of substance?

a)

mole (mol)

b)

iguana (iga)

c)

shark (sk)

24.

What does SI stand for?

a)

So Ingenious

b)

Incredible Science

c)

International System of Units

25.

Which SI unit is used to measure time?

a)

K

b)

s

c)

mol

d)

N

26.

Which SI unit is used to measure mass?

a)

s

b)

m

c)

kg

d)

Pa

27.

Which SI unit is used to measure length?

a)

mol

b)

m

c)

kg

d)

m2

28.

What is the symbol for the prefix kilo-?

a)

L

b)

m

c)

k

d)

kg

29.
Which unit is the smallest?  
a)
km
b)
mm
c)
m
d)
cm 
30.
2 kilometer = ___ meters
a)
1 meters
b)
1,000 meters
c)
2,000 meters
d)
200 meters
31.
1000 grams = _____ kilograms
a)
0.0001
b)
1,000,000
c)
10
d)
1
32.
What did I measure if I record that something was 56 mL?
a)
Volume
b)
Mass
c)
Time
d)
Distance
33.

Which SI unit is used to measure area?

a)

m

b)

m2

c)

m3

d)

kg/m3

34.

The way something looks, feels, smells, and tastes are physical properties.

a)

True

b)

False

35.

Ability of substance to dissolve into another substance:

a)

magnetism

b)

malleability

c)

solubility

d)

appearance

36.

How a substance reacts to a magnet (attract or repel):

a)

solubility

b)

malleability

c)

state of matter

d)

magnetism

37.

The final product of any physical change is still composed of the same matter.

a)

True

b)

False

38.

Anything that has mass and takes up space.

(everything is made of this)

a)

mass

b)

matter

c)

volume

d)

reflectivity

39.

ability for energy, such as electricity and heat, to move through an object.

a)

conductivity

b)

solubility

c)

mass

d)

volume

40.

When matter reacts with fire?

a)

toxicity

b)

flammability

c)

oxidation

41.

color

a)

physical property

b)

chemical property

42.

flammable

a)

physical property

b)

chemical property

43.

hardness

a)

physical property

b)

chemical property

44.

odor/smell

a)

physical property

b)

chemical property

45.

tarnish/rust

a)

physical property

b)

chemical property

46.

taste

a)

physical property

b)

chemical property

47.

texture

a)

physical property

b)

chemical property

48.

reactivity

a)

physical property

b)

chemical property

49.

A property that can be observed WITHOUT changing the chemical composition of an object

a)

chemical property

b)

physical property

50.

Which of the following is NOT a physical property?

a)

flammability

b)

melting point

c)

density

d)

luster

51.

The temperature at which a liquid turns into a gas

a)

melting poing

b)

boiling point

52.

At what temperature does water freeze?

a)

0ᵒC or 32ᵒF

b)

0ᵒF or 32ᵒC

c)

100ᵒC or 212ᵒF

d)

100ᵒF or 212ᵒC

53.

Which of the following is NOT an example of a chemical reaction?

a)

flammability

b)

oxidation

c)

reactivity

d)

melting point

54.

What is the formula for density?

a)

volume/mass

b)

volume x mass

c)

mass/volume

55.

the ability of a material to bend or be hammered into other shapes without breaking.

a)

Ductility

b)

Malleability

c)

Toxicity

d)

Solubility

56.
Is frying an egg a physical or chemical change?
a)
chemical
b)
physical
57.

Which of the following is true?

a)

A physical property can only be seen.

b)

A physical property describes how matter can change when exposed to air.

c)

A physical property is something that can be observed about the substance by itself.

d)

A physical property can only be observed when two types of matter interact.

58.

Jack leaves solid butter near a warm surface. When Jack returns, the butter has turned into a liquid. Jack's friend Elijah insists this is a chemical change. Is Elijah right?

a)

no, because no new matter was formed

b)

yes, because the matter changed states

c)

no, because the butter didn’t have enough time to go through a chemical change

d)

yes, because melted butter is a new type of matter

59.
Is burning wood a chemical or physical change?
a)
chemical
b)
physical
60.
Is glass breaking a chemical or phyiscal change?
a)
chemical
b)
physical
61.
Is melting ice a chemical or physical change?
a)
chemical
b)
physical
62.
Is spoiling food a physical or chemical change?
a)
phyiscal
b)
chemical
63.

When you increase the energy by heating a liquid what happens to the motion of the molecules

a)

They slow down

b)

They speed up

c)

Heat doesnt change the motion of the molecules

64.

Is this an example of a physical or chemical change?

a)

physical

b)

chemical

65.

Is this an example of a physical or chemical change?

a)

physical

b)

chemical

66.

Which of these actions cause a PHYSICAL change?

a)

rusting of metal pipes

b)

burning a log

c)

cooking an egg

d)

crushing an aluminum can

67.

Rusting metal is an example of a ____ change.

a)

chemical

b)

phase

c)

state

d)

physical

68.

Salt water, a mixture, is made by dissolving salt in water. Mixtures like this can be separated by using the physical properties of the mixture. Which would be the best way to separate a mixture made of salt and water?

a)

evaporation

b)

chromotography

c)

magnetism

d)

filtering

69.

Which is an example of a chemical change?

a)

baking a cake

b)

ripping paper

c)

stretching a rubber band

d)

chopping wood

70.

Which of the following options provides evidence of a CHEMICAL change?

a)

Wood is burned releasing ash and smoke

b)

Rocks separate when soil is sifted

c)

Boiling water bubbles when heated

d)

Salt dissolves in water

71.

Use the basic properties of solids, liquids, and gases to identify the correct state of matter in the image.

a)

(A) gas, (B) liquid, (C) solid

b)

(A) solid, (B) liquid, (C) gas

c)

(A) liquid, (B) solid, (C) gas

d)

(A) solid, (B) gas, (C) liquid

72.
Is a a rusting bicycle a chemical or physical change?
a)
chemcial
b)
physical
73.

What is physical change?

a)

How two chemicals react with one another when combined

b)

A property that we can measure or observe with our 5 senses or other tools

c)

When two chemicals react with one another to form a new substance

d)

When a change occurs but it does not result in the formation of a new substance

74.
a)
element
b)
compound
c)
mixture of elements
d)
mixture of compounds
75.

The three types of mixtures are..

a)

solutions, solutes, solvents

b)

solutions, colloids, suspensions

c)

solutions, colloids, sediments

d)

concentrates, dilutes, dissolvers

76.

If a substance is soluble is means...

a)

that it can dissolve into another substance

b)

that it cannot dissolve into another substance

c)

it must be a concentrated substance

d)

it must be a diluted substance

77.

An example of an insoluble substance would be..

a)

cordial in water

b)

chocolate power in milk

c)

sugar in water

d)

oil in water

78.

A suspension is a mixture that has

a)

a solute and a solvent

b)

a sediment

c)

a cloudy appearance

d)

oil in it

79.

Which best describes the word sediment?

a)

a substance that something else can dissolve into

b)

small particles that easily dissolve

c)

medium sized particles that block light

d)

large particles that settle to the bottom of a mixture

80.

A feature of a colloid is that..

a)

they are cloudy

b)

they are transparent

c)

they are colourless

d)

they have a sediment

81.

Solutions has ______________ sized particles, colloids have _________________ sized particles, and suspensions have _________________________ sized particles.

a)

small, medium, large

b)

large, medium, small

c)

medium, small, large

d)

medium, large, small

82.

Fog

a)

Solution

b)

Colloid

c)

Suspension

83.

Soda

a)

Colloid

b)

Solution

c)

suspension

84.

Sand in water

a)

colloid

b)

solution

c)

suspension

85.

Sunscreen

a)

Colloid

b)

Solution

c)

Suspension

86.

Milk

a)

Colloid

b)

Solution

c)

Suspension

87.

Snow globe

a)

Colloid

b)

Solution

c)

Suspension

88.

Vinegar

a)

Colloid

b)

Solution

c)

Suspension

89.

Brass

a)

Homogenous

b)

Heterogeneous

90.

Mayonnaise

a)

Homogeneous

b)

Heterogeneous

91.

Italian dressing

a)

Homogeneous

b)

Heterogeneous

92.

What is it called when light passes through a colloid and scatters/spreads out?

a)

Tyndall Effect

b)

Fog Effect

c)

Timer Effect

d)

Substance Effect

93.

Transition from a liquid to a gas

a)

Condensation

b)

Freezing

c)

Evaporation

d)

Melting

94.

Gas condenses to a liquid

a)

Evaporation

b)

Melting

c)

Freezing

d)

Condensation

95.

What happens to molecules when their kinetic energy increases?

a)

The molecules move slower

b)

The molecules move faster

c)

The molecules get heavier

d)

It depends on the type of molecule

96.

Three containers with the same amount of the same material are shown below. Which container has the substance with the highest amount of energy?

a)

The container on the left

b)

The middle container

c)

The container on the right

d)

All have an equal amount of energy

97.

Three containers with the same amount of the same material are shown below. Which container has the substance with the lowest amount of energy?

a)

The container on the left

b)

The middle container

c)

The container on the right

d)

All have an equal amount of energy

98.

Amy was sitting outside on a hot, summer day, enjoying a glass of sweet iced tea. She notices some water droplets on the outside of her glass.  What is causing those water droplets?

a)

The outside air is heating up the ice, causing it to melt into a liquid.

b)

The cold liquid in the glass is cooling the air around it, making it condense into a liquid.

c)

The outside air is heating up the liquid in the glass, causing it to evaporate.

d)

The liquid in the glass is cooling the air around it, causing it to evaporate.

99.

When you boil water in a pot, some of the water escapes as steam. Which of the following choices explains what is happening with the water molecules in this scenario?

a)

The molecules slow down as the kinetic energy increases and move farther apart from one another.

b)

The molecules slow down as the kinetic energy decreases and move closer together.

c)

The molecules speed up as the kinetic energy increases and the molecules move farther apart from one another.

d)

The molecules speed up as the kinetic energy decreases and the molecules move closer together.

100.

Which statement best describes what happens when heat is added to a substance?

a)

Energy moves out of the substance causing the molecules to slow down.

b)

Energy moves out of the substance causing the molecules to speed up.

c)

Energy moves into the substance causing the molecules to slow down.

d)

Energy moves into the substance causing the molecules to speed up.

101.

The slower the particles in a substance move,

a)

the colder it is.

b)

the warmer it is.

c)

the more energy it has.

102.

What state of matter?

a)

Solid

b)

Liquid

c)

Gas

d)

Plasma!!!

103.

What state of matter?

a)

Solid

b)

Liquid

c)

Gas

104.
7. All phase changes (changing states) requires energy to be added or taken away.
a)
True
b)
False
105.

Transition from a solid to a liquid

a)

Condensation

b)

Melting

c)

Freezing

d)

Evaporation

106.

Transition from a liquid to a solid

a)

Freezing

b)

Sublimation

c)

Melting

d)

Evaporation

107.

In which time period are we currently living?

a)

Precambrian Time

b)

Paleozoic Era

c)

Mesozoic Era

d)

Cenozoic Era

108.

Dinosaurs, small mammals, and birds are found in this time period.

a)

Precambrian

b)

Paleozoic

c)

Mesozoic

d)

Cenozoic

109.

What are fossils that are abundant, easily recognizable, short lived, and widespread called?

a)

Preserved fossils

b)

Index fossils

c)

Imprints

d)

Radioactive dating

110.

Preserved remains of plants and animals from the remote past are called?

a)

Sedimentary rocks

b)

Radioactive dating

c)

Decayed organisms

d)

Fossils

111.

The Law of Superposition states

a)

Younger rocks layers are on top of older rock layers

b)

Fossils are found in sedimentary rocks

c)

Older rock layers are on top of younger rock layers

d)

Absolute age dating

112.

Which era was the longest, taking up 88% of geologic time?

a)

Precambrian

b)

Paleozoic

c)

Mesozoic

d)

Cenozoic

113.

What does absolute age tell us about a rock layer or fossil?

a)

The 'exact' age of a fossil determined by radiometric dating

b)

The relative age of a fossil determined by radiometric dating

c)

Younger rock layers sit on top of older rock layers

d)

Older rock layers sit on top of younger rock layers

114.

Which fossil would make the best index fossil?

a)

Beetle

b)

Flower

c)

Frog

d)

Fish

115.
Paleontologists infer that the earth is approximately how many years old?
a)
4.5 million years
b)
450 million years
c)
450 billion years
d)
4.5 billion years
116.

Which of the following organizes the divisions of geologic time from longest to shortest?

a)

eons, eras, periods, epochs

b)

epochs, periods, eras, eons

c)

periods, eons, epochs, eras

d)

eras, epochs, eons, periods

117.

Which series shows the divisions of geologic time arranged in order, from longest to shortest?

a)

eon>era>epoch> period

b)

eon>era>period> epoch

c)

era>eon>epoch>

period

d)

era>eon>period> epoch

118.

Which of the following is used as evidence to construct the geologic time scale?

a)

fossils

b)

radiometric age data

c)

comparative studies of different rock sequences

d)

all of the above

119.

Which of the following is NOT a division of geologic time?

a)

eons

b)

periods

c)

generations

d)

epochs

120.

_________ is a space in rock in the shape of a living thing.

a)

trace fossil

b)

body fossil

c)

cast fossil

d)

mold fossil

121.

________ is when minerals harden into the shape of the mold.

a)

trace fossil

b)

cast fossil

c)

mold fossil

d)

body fossil

122.

All matter is made of _________.

a)
energy 
b)
atoms 
c)
electrons 
d)
compounds 
123.
What is at the center of every atom?
a)
An electron
b)
A compound
c)
A molecule
d)
A nucleus
124.
The positively charged particles of an atom are the ________.
a)
electrons
b)
protons
c)
neutrons
d)
protons & neutrons
125.
What does the nucleus of an atom contain?
a)
Electrons and neutrons
b)
Protons and neutrons
c)
Neutrinos and positrons
d)
DNA and RN
126.

Atoms are made up of ________________

a)

energy

b)

electrons

c)

subatomic particles

d)

gasses

127.

The subatomic particles that make up an atom.

a)

solid, liquid, gas

b)

electrons, protons, nucleus

c)

energy, protons, nucleus

d)

electrons, protons, neutrons

128.

__________ are negatively charged particles that are in the orbitals around the nucleus.

a)

protons

b)

nucleus

c)

neutrons

d)

electrons

129.

A proton has a ___________ charge.

a)

positive

b)

negative

c)

neutral

d)

massive.

130.

An electron has a _________ charge

a)

positive

b)

neutral

c)

negative

d)

massive

131.

A neutron has _________ charge or is ________.

a)

negative ... neutral

b)

positive .... neutral

c)

no .... negative

d)

no ... neutral

132.
Which is an electron?
a)
A
b)
B
c)
C
133.

The smallest part of any element. Made up of protons, neutrons and electrons.

a)

Atom

b)

AMU

c)

Ion

d)

Isotope

134.

Which TWO of the following subatomic particles are inside the nucleus?

a)

protons

b)

electrons

c)

neutrons

d)

There are no subatomic particles in the nucleus of an atom.

135.
If an atom has 3 electrons, how many protons does it have?
a)
1
b)
2
c)
4
d)
3
136.

What is the correct formula for calculating how many neutrons are in an atom?

a)

Protons + Electrons= Neutrons

b)

Atomic mass - Atomic number= Neutrons

c)

Atomic mass + Atomic number = Neutrons

d)

Atomic mass - Protons = Neutrons

137.

How many neutrons does nitrogen have?

a)

7

b)

14

c)

0

d)

6

138.

What is the atomic number of this atom?

a)

2

b)

4

c)

6

d)

8

139.

What is the atomic number of this element?

a)

17

b)

18

c)

35

d)

35.453

140.

Use the periodic table below to determine the number of protons in Bromine (Br).

a)

35

b)

79.904

c)

36

d)

83.798

141.

Use your periodic table to determine the number of protons in Neon (Ne).

a)

18.998

b)

20.18

c)

10

d)

12

142.

What is the atomic mass for this element? (Round to the nearest WHOLE number.) (This information for this element can be found on the periodic table!)

a)

11

b)

19

c)

24

d)

23

143.

The sum of the number of protons and the number of neutrons is called the _____

a)

Atomic Number

b)

Atomic Mass

c)

Atomic Symbol

d)

Atomic Name

144.

In the Bohr model of the atom, what is the maximum number of electrons in the first shell?

a)

2

b)

8

c)

1

d)

6

145.

•What elementary particles are the building blocks for protons and neutrons?

a)

•Quarks

b)

• Leptons

c)

• Photons

d)

• Gluons

146.

Name the type of graph.

a)

pie chart

b)

tally chart

c)

pictograph

d)

bar graph

147.

Name the type of graph.

a)

pie chart

b)

tally chart

c)

pictograph

d)

bar graph

148.
What type of graph is this?
a)
Bar graph
b)
Histogram
c)
Pie Chart
d)
Stem Chart
149.
What is the title of the graph?
a)
Number of people
b)
Character
c)
Favorite Cartoon Characters
d)
Sponge Bob
150.
Which type of graph shows change over time?
a)
bar graph
b)
line graph
c)
circle graph
151.
What type of graph is this?
a)
Line Graph
b)
Pictograph
c)
Bar Graph
d)
Histogram
152.
A pie chart allows you to easily see
a)
information about the proportion of parts relative to the whole.
b)
the total number of each category.
c)
how much data occurs within a range of numbers.
d)
the spread of the data.
153.
I have an x-axis and a y-axis. I help to track changes over time. What am I?
a)
Circle Graph
b)

Bar Graph

c)
Line Graph
154.
I have an x-axis and a y-axis. I help to compare categories. There are spaces between my bars. What am I?
a)
Bar Graph
b)

Circle Graph

c)
Line Graph
155.
When would I use a graph like this?
a)
To see changes over time
b)
To compare parts to a whole
c)
To compare categories
d)
To see frequency
156.

What two properties do you need to find density?

a)

Volume and weight

b)

Mass and volume

c)

Only volume

d)

Only mass

157.

The formula for finding density is:

a)

 

The volume divided by the mass.

b)

The mass multiplied by the volume.

c)

The mass divided by the volume.

d)

The volume multiplied by the mass.

158.

The mass of the jade is 13g, what is the density?

a)

1.3 g/mL

b)

0.81 g/mL

c)

1.24 g/mL

d)

0.77 g/mL

159.

What is the same about the cubes?

a)

Density

b)

Weight

c)

Mass

d)

Volume

160.

What is this tool called....

a)

Ruler

b)

Thermometer

c)

Beaker

d)

Graduated Cylinder

161.

What is the density of water?

a)

34 g/mL

b)

1 g/mL

c)

29 g/mL

d)

6 g/mL

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