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Midterm Review 7th Grade

Total questions: 100

Worksheet time: 2hrs 40mins

Name
Class
Date
1.
Earth's atmosphere is mostly ...
a)
Oxygen
b)
Water vapor
c)
Nitrogen
d)
Carbon Dioxide
2.
A planet similar to Earth in size, mass, and density.
a)
Mercury
b)
Venus
c)
Mars
d)
Neptune
3.
Which of the inner planets does NOT have an atmosphere?
a)
Mars
b)
Mercury
c)
Venus
d)
Ceres
4.
Which planet has the presence of liquid water and a solid inner core?
a)
Mercury
b)
Venus
c)
Earth
d)
Mars
5.
This planet has the most moons in our solar system.
a)
Jupiter
b)
Saturn
c)
Uranus
d)
Neptune
6.
Who first discovered Jupiter's moons?
a)
Galileo
b)
Isaac Newton
c)
Albert Einstein
d)
Edwin Hubble
7.
The majority of the mass in our solar system is in the __________.
a)
Asteroid Belt
b)
Jupiter
c)
Sun
d)
Earth
8.
What are two units of measurement for distances in space?
a)
AU
b)
parsec
c)
lightyear
d)
retrograde
9.
What is the shape of planetary orbits?
a)
Straight
b)
Circular
c)
Elliptical
d)
Cubic
10.
Planets orbit the sun because of which two?
a)
energy
b)
gravity
c)
balanced forces
d)
inertia
11.
A natural satellite that revolves around a planet.
a)
asteroid
b)
meteoroid
c)
geocentric
d)
moon
12.
A loose collection of ice and dust that orbits the Sun, typically in a long, narrow orbit
a)
planet
b)
asteroid
c)
comet
d)
meteroid
13.
What are the characteristics of a planet? Check all that apply.
a)
Orbits a star
b)
Large enough to have become rounded by its own gravity
c)
are all the same size
d)
Has cleared the area of its orbit
14.
What are the elements required for a planet to be just right to support life?
a)
The right distance from a star
b)
The presence of the right number of moons
c)
The presence of water
d)
The presence of methane
e)
The presence of the right type of atmosphere
15.
What is not part of our solar system?
a)
The Sun
b)
Eight planets and about 5 dwarf planets
c)
More than 170 moons
d)
Comets and Asteroids
e)
A black hole
16.
The part of space in our solar system where the Sun's energy provides the conditions for liquid water to exist is called the ________ _________.
a)
habitable zone
b)
twilight zone
c)
dead zone
d)
transitional zone
17.
Why is Pluto now a dwarf planet, not a planet?
a)
it has not cleared its orbit of other objects
b)
A planet must have a rocky surface
c)
A planet must have a circular orbit
d)
It is smaller than Earth
18.
Choose the best description for a meteoroid.
a)
-burns up while entering earths atmosphere
b)
-hits earth surface
c)
-still in space
d)
made of rock and ice
19.
Choose the best description for a meteor.
a)
-burns up while entering earths atmosphere
b)
-hits earth surface
c)
-still in space
d)
made of rock and ice
20.
Choose the best description for a meteorite.
a)
-burns up while entering earths atmosphere
b)
-hits earth surface
c)
-still in space
d)
made of rock and ice
21.
If the distance between two objects is tripled, what happens to the gravitational force between them?
a)
It becomes 1/3 as strong
b)
It becomes 1/6 as strong
c)
It becomes 1/9 as strong
d)
It becomes 3 times as strong
22.

At what point is the speed the greatest?

a)

C-D

b)

B-C

c)

A-B

d)

D-E

23.

Two people walk across a parking lot. Their paths are shown in the image. Who traveled with a larger displacement?

a)

Person A

b)

Person B

c)

They both had the same displacement.

24.
Liza is swimming laps from one end of a 50 meter pool to the other. Going from one end to the other is considered one lap. If she swims four complete laps, which statement is TRUE?
a)
Her distance and displacement are both zero.
b)
Her distance is zero, but her displacement is 200 meters.
c)
Her distance is 200 meters, but her displacement is zero.
d)
Her distance and displacement are both 200 meters.
25.
How long would it take a bus traveling at 50 km/h to travel 125 km?
a)
6,250 hours
b)
2.5 km
c)
2.5 hours
d)
6,250 km
26.
If I choose to walk to school at a speed of 3mph, it will take me 4 hours to arrive. How far away do I live?
a)
7 miles
b)
12 miles
c)
1 mile
d)
.75 miles
27.

Steve runs 20 m North in 4 seconds. What is his velocity

a)

5 m/s

b)

4 m/s south

c)

5 m/s south

d)

5 m/s north

28.

A runner runs 2 laps around a track with a circumference of 400 m in 100 seconds. What is their average velocity?

a)

80 m/s

b)

0

c)

40 m/s

d)

60 m/s

29.
Which of the following describes distance and displacement correctly?
a)
The blue arrow shows distance and the orange arrows show displacement
b)
The blue arrow shows displacement and the orange arrows show distance
c)
Both arrows show distance only
d)
Both arrows show distance and displacement
30.
What is velocity?
a)
the quickness of an object
b)
the location of an object
c)
acceleration
d)
speed in a specific direction
31.

A 20 kg object needs how big of a net force to keep moving at a constant velocity?

a)

0 N

b)

20 N

c)

200 N

d)

2 N

32.

If an astronaut has a mass of 88 kg on the Earth, her mass up in orbit on the International Space Station would be:

a)

88 kg

b)

0 kg

c)

44 kg

d)

You can't tell because she would be weightless.

33.

An astronaut kicks a soccer ball in outer space at a location far from significant influences of gravity and air resistance. The soccer ball will _________.

a)

continue in motion with the same speed and direction

b)

eventually stop as its inertia slowly becomes used up

c)

eventually stop since all objects ultimately "lose their steam"

d)

either a, b, or c -- depending on whether the astronaut continues to kick it

34.
If one object has twice as much mass as another object, it also has twice as much...
a)
inertia
b)
velocity
c)
acceleration due to gravity
d)
DO NOT PUSH ME
35.
The law of inertia (Newton’s First Law) applies
a)
to both moving and nonmoving objects
b)
only to moving objects
c)
only to objects that are not moving
36.

Why does an 18-wheeler truck have more inertia than a bicycle?

a)

it has more mass

b)

it has more volume

c)

it is not as aerodynamic

d)

it has more space

37.

An object's tendency to resist (not) change its state of motion.

a)

gravity

b)

force

c)

inertia

d)

friction

38.
What kind(s) of objects have inertia?
a)
all objects with mass
b)
only objects at rest
c)
only objects in motion
d)
only objects whose motion is being changed
39.
What is net force? 
a)
A force associated with the internet. 
b)
The combined forces acting on a particular object. 
c)
The same thing as inertia.
d)
The same thing is gravity. 
40.
If an unbalanced force acts on an object, what will happen?
a)
It will not move at all. 
b)
It will accelerate in the same direction as the force. 
c)
It will accelerate in the direction opposite the force. 
d)
It will accelerate at an angle of 90 degrees to the force. 
41.

Which of the following has no acceleration?

a)

A motorcycle speeding up

b)

A school bus coming to a stop at a stop sign

c)

A mini van going a constant speed

d)

The moon in orbit around Earth

42.

What is the difference between speed and velocity?

a)

There is no difference.

b)

Speed is calculated in a different way.

c)

Velocity is speed with a given direction.

d)

Both have the same units.

43.

A hockey puck sliding on ice eventually comes to a stop. Describe the forces involved.

a)

unbalanced

b)

balanced

c)

Fnet = 0

d)

None of these

44.

Which is faster?

a)

walking

b)

skating

c)

biking

45.

Describe the motion in the graph:

a)

Constant Speed (positive slope)

b)

Stopped (at rest)

c)

Acceleration (increasing speed)

d)

Return Home (negative slope)

46.
What two measurements are necessary for calculating speed?
a)
Mass and time
b)
Temperature and mass
c)
Mass and distance
d)
Distance and time
47.

Match the description to the graph:

"The car is slowing down."

a)
b)
c)
d)
48.

A measure of the average kinetic energy of the individual particles in an object is called

a)

thermal energy

b)

conduction

c)

convection

d)

temperature

49.

What is temperature?

a)

The sum of kinetic and potential energy of the particles in an object

b)

The transfer of energy from one object to another

c)

The measure of the average kinetic energy of particles in an object

d)

The thermal energy that is moving or is capable of moving

50.

What is thermal energy?

a)

The sum of kinetic and potential energy of the particles in an object

b)

The transfer of energy from one object to another

c)

The measure of the average kinetic energy of particles in an object

d)

The thermal energy that is moving or is capable of moving

51.

Thermal expansion occurs because:

a)

Particles slow down and come closer together when heated

b)

Particles speed up and spread apart when heated

c)

Particles change from solid to liquid

d)

Particles are destroyed by heat

52.
The temperature of a glass of cold water will eventually...
a)
Match the temperature of the surrounding environment.
b)
Always be colder than the surrounding environment.
c)
Become warmer than the surrounding environment.
d)
Never change temperature.
53.

True or False:

Thermal expansion occurs in all 3 states of matter (solid, liquid, gas)

a)

True

b)

False

54.

Many objects, such as train tracks and road joints, are specifically designed to allow extra space for (a)  

Choose from the below words
thermal expansion
thermal energy
thermal equilibrium
thermal venting
55.

The movement of thermal energy from a region of ​ (a)   temperature to a region of ​ (b)   temperature is called heat.

Choose from the below words
high
low
56.

Convection currents can be observed in ...

a)

liquids

b)

gases

c)

solids

d)

superconductors

57.
What is Thermal expansion?
a)
The transfer of thermal energy between materials by the collisions of particles 
b)
Is a decrease in a materials volume when temperature decreases 
c)
An increase in a materials volume when temperature increases
d)
Chicken fried rice
58.

Heated air moves from baseboard heaters to the rest of a room in a process called

a)

conduction

b)

convection

c)

radiation

d)

insulation

59.
An increase in the volume of a substance when the temperature increases is called ___________________________________.
a)
kinetic energy
b)
thermal expansion
c)
temperature
d)
heat
60.
The liquid in a thermometer ______________ as the temperature increases.
a)
expands
b)
disappears
c)
freezes
d)
explodes
61.

Convert 110 ℉ to ℃.

a)

33

b)

23

c)

53

d)

43

62.

The temperature at which particles stop moving is

a)

0 oC

b)

32 oF

c)

0 K

d)

0 oF

63.

Convert 125 °C  = ? °F125\ \degree C\ \ =\ ?\ \degree F

(Round to the nearest tenth).

(a)  

64.

A snowball is made up of frozen water, which means its temperature is at or below 0°C. A person's hand is usually at normal body temperature, about 37°C.


A person holds a snowball in his hand. Which photo shows the direction of thermal energy transfer?

a)
b)
c)
d)
65.

During summer the ground temperature is 50°C. If you place a piece of ice that has a temperature of –6°C.

Which statement best explains what happens?

a)

Heat transfers coldness from the ice to the ground.

b)

Thermal energy transfers heat from the ground to the ice.

c)

Thermal energy transfers coldness from the ground to the ice.

d)

Heat transfers thermal energy from the ground to the ice.

66.

The transfer of thermal energy between objects

a)

Kinetic energy

b)

Temperature

c)

Heat

d)

Potential energy

67.

If it is very cold outside and you start feeling cold, what happened?

a)

The cold is going into your body and making you cold

b)

You are losing thermal energy (heat) from your body to the cold environment

68.

When you put ice into a drink what happens?

a)

The ice puts cold into the drink

b)

The heat leaves the drink and goes into the ice

c)

nothing

69.
Convection could occur in which of the materials below?
a)
A block of wood
b)
The ocean
c)
A bowl of ice cream
d)
In space
70.
Which example below is an example of radiation?
a)
Standing on a hot metal bridge
b)
The attic is warmer than the basement
c)
The Sun heating the Earth
d)
Touching hot sand with your feet
71.
Radiation is a method of thermal energy transfer that moves -
a)
through empty space.
b)
when objects touch.
c)
only through solids.
d)
in the motion of fluids.
72.

Which process transfers thermal energy through waves?

a)

Radiation

b)

Conduction

c)

Convection

d)

Circulating

73.

How is thermal energy different from temperature?

a)

Thermal energy is the total energy due to motion of particles, while temperature is the average kinetic energy of atoms.

b)

Thermal energy is the same as temperature.

c)

Thermal energy is only found in solids, while temperature is only in gases.

d)

Thermal energy measures compactness, while temperature measures volume.

74.

What is a substance that is dissolved in another substance? 

a)

Solution

b)

Solvent

c)

Solute

d)

Compound

75.

What is the term for a mixture in which one substance is evenly distributed within another?

a)

Suspension

b)

Colloid

c)

Solution

d)

Emulsion

76.

Which of the following is a characteristic of a solvent?

a)

It is always a liquid.

b)

It dissolves other substances.

c)

It is always a solid.

d)

It cannot be separated.

77.

In a saltwater solution, what is the role of water?

a)

Solute

b)

Solvent

c)

Solution

d)

Compound

78.
A measure of the amount of solute in a given amount of solvent or solution is...
a)
saturated
b)
solubility
c)
concentration
d)
miscible
79.

The smaller the particle size, the faster the rate of dissolution (rate of dissolving).

a)

True

b)

False

80.

Which combination would dissolve a solid solute the fastest?

a)

High temperature, no stirring

b)

No heat, no stirring

c)

Sugar cube, no heat

d)

High temperature, stirring

81.
This diagram represents a _____.
a)
pure substance that is a compound
b)
mixture of elements
c)
pure substance that is an element
d)
mixture of compounds
82.

What type of substance is being modeled here?

a)

Element

b)

Compound

c)

Homogeneous Mixture

d)

Heterogeneous Mixture

83.

Which diagram(s) are modeling pure substances?

a)

1 only

b)

1, 3, and 4

c)

2 only

d)

1 and 4

84.

Which model represents a compound?

a)

Model 1

b)

Model 2

c)

Model 3

d)

Model 4

85.

Which element makes up most of Earth’s atmosphere?

a)

Hydrogen

b)

Carbon

c)

Oxygen

d)

Nitrogen

86.

How are elements and compounds different?

a)

A compound is represented by a chemical formula, and elements are represented by a chemical symbol.

b)

Compounds are represented by chemical symbols of one letter, and elements are represented by symbols of two letters.

c)

Elements are pure substances, and compounds are not.

d)

Elements are always larger units of matter, and compounds are smaller.

87.

How many elements are in the compound Fe2O3?

a)

0

b)

1

c)

2

d)

3

88.

Water is made up of hydrogen and oxygen, two elements that were chemically combined. This makes water a(n)

a)

atom

b)

compound

c)

element

d)

mixture

89.

__ is a pure substance containing two or more kinds of atoms.

a)

Element

b)

compound

c)

mixture

d)

solution

90.

The smallest particle of an element; the smallest unit of matter.

a)

atom

b)

element

c)

compound

d)

mixture

91.

Is this an example of a physical or chemical change?

a)

Physical

b)

Chemical

92.

Is this an example of a physical or chemical change?

a)

Physical

b)

Chemical

93.

Which lab experiments below describe a situation where a chemical change has occurred? Check all that apply.

a)

After adding zinc (Zn) to hydrochloric acid (HCl), a student observes bubbles forming in the solution and a thermometer registers a 10°10\degree  change in temperature.

b)

A student uses a mortar and pestle (a grinding stone) to break up large pieces of ammonium thiocyanate ( NH4SCNNH_4SCN  ) into smaller pieces.

c)

After combining Unknown A (a solid, white crystal) with Unknown B (a clear, odorless liquid), there is a strong smell produced and a thermometer registers a  15°15\degree  change in temperature.

d)

A student dissolves sugar ( C6H6O6C_6H_6O_6  ) into water ( H2OH_2O  ). The sugar crystals seem to disappear.

94.

Match the following

a)

Physical property

1.

Color

b)

Physical property

2.

Melts at 145 °C

c)

Physical property

3.

Good conductor of heat

d)

Chemical property

4.

Burns easily (flammable)

e)

Chemical property

5.

Reacts violently with chlorine

95.

Match the following

a)

Chemical change

1.

Burning gasoline

b)

Chemical change

2.

Milk sours

c)

Chemical change

3.

Digesting food

d)

Physical change

4.

Dissolving sugar in water

e)

Physical change

5.

Ethyl alcohol evaporates

96.

Chemical Properties are characteristics that are observed or measured without changing matter.

a)

True

b)

False

97.

Which is a sign of a chemical reaction and or an example of a physical change?

a)

change in color

b)

ice melting

c)

flammability

d)

density

98.

Which is an example of a physical change?

a)

change in odor

b)

ice melting

c)

flammability

d)

density

99.

Which is and example of a chemical property?

a)

change in odor

b)

ice melting

c)

flammability

d)

density

100.

Which is and example of a physical property?

a)

change in odor

b)

ice melting

c)

flammability

d)

density

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7th Grade