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GS2 Semester 1 Review(NGSS 8th grade)

Total questions: 85

Worksheet time: 2hrs 56mins

Name
Class
Date
1.

What is the net force?

a)

3 N

b)

3 N, right

c)

17 N, right

d)

3 N, left

2.
Who wins the tug of war with what net force?
a)
The person on the left with 20 N
b)
The person on the left with 80 N
c)
The people on the right with 20 N
d)
The people on the right with 100 N
3.
What is the net force?
a)
20 N 
b)
0 N 
c)
400 N 
d)
40 N 
4.

A ____________ is a push or a pull on an object.

a)

friction

b)

force

c)

magnet

d)

gravity

5.
If these teams are pulling with the same amount of force what will happen?
a)
The boy in blue will win.
b)
They will not move at all.
c)
The boy in red will win.
d)
Both will fall down.
6.
Calculate the Net Force. 
a)
60N, Left 
b)
40N, Right 
c)
0N
d)
60N, Right
7.
What force holds the planets in motion around the sun?
a)
Magnetic
b)
Electrical
c)
Gravitational
d)
Air Resistance
8.
What does the strength of gravity between two objects depend upon?
a)
Mass & distance
b)
Mass & weight
c)
Gravity & inertia
d)
Inertia & mass
9.
Jupiter has about 317 times more mass than Earth. What can you infer from this fact? 
a)
That Jupiter’s gravitational force is much weaker than on Earth’s gravitational force.
b)
That Jupiter’s gravitational force is much stronger than Earth’s gravitational force.
c)
That Jupiter’s and Earth’s gravitational forces are equal.
d)
Mass has no effect on the gravitational force between two objects
10.

. Force exerted between the surfaces of two objects.

a)

Friction

b)

Inertia

c)

Forces

d)

Gravity

11.

Object tendency to resist change

a)

Friction

b)

Inertia

c)

Forcé

d)

Gravity

12.

Which one of Newton's laws is shown

a)

3rd law

b)

2nd law

c)

1st law

13.

Which one of Newton's laws are displayed

a)

2nd law

b)

1st law

c)

3rd law

14.

Which of Newton's laws is shown

a)

1st law

b)

3rd law

c)

2nd law

15.

Which is an example of Newton's First law of inertia?

a)

A rocket taking off from Earth

b)

A crash test dummy flies through the windshield in a collision

c)

A small rock skips on a pond faster than a large rock

16.

Which is an example of the law of acceleration?

a)

A rocket taking off from Earth

b)

A crash test dummy flies through the windshield in a collision

c)

A small rock skips a pond faster than a large rock

17.
It takes more force to accelerate the iron man on the left than the iron man on the right because the iron man on the left has more mass. This best describes
a)
Newton's first law, the law of inertia
b)
Newton's second law, the law of acceleration
c)
Newton's third law, the law of action reaction 
d)
The law of universal gravitation
18.

Which is an example of the law of action/reaction?

a)

A rocket taking off from Earth

b)

A crash test dummy flies through the windshield in a collision

c)

A small rock skips a pond faster than a large rock

19.
Newton's third law states that any action will have a(n) _______ and ______ reaction
a)
Equal and similar
b)
Equal and opposite
c)
Equal and different
d)
Greater and opposite
20.

Which example best describes Newton’s 3rd Law?

a)

Paddling a canoe to make the boat move

b)

A large truck takes longer to slow down than a car

c)

Falling forward in a train that is slowing down quickly

21.
At which point is potential energy greatest
a)
W
b)
X
c)
Y
d)
Z
22.

A person not paying attention while skateboarding hits a rock. The skateboard stops...they don't.

a)

The Law of Inertia (1st law)

b)

The Law of Acceleration (2nd law)

c)

The Law of Conservation of Momentum

d)

Action Reaction Law (3rd law)

23.
What is the attractive force that exists between all objects that have mass?
a)
Weight
b)
Mass 
c)
Gravity
d)
Viscosity
24.
When a cannon fires a cannonball we observe Newton's third law. Which force is the reaction force?
a)
The cannon moving forward
b)
The cannonball moving forward
c)
The cannon moving backward
d)
The cannonball moving backward
25.

If the man pushes with an equal amount of force, which object will accelerate more?

a)

Car because it has more mass

b)

Lawnmower because it has less mass

c)

Car because it has less mass

d)

Lawnmower because it has more mass

26.

When mass increases, Gravity _______________?

a)

increases

b)

decreases

c)

stays the same

d)

is not affected

27.

When mass decreases, Gravity _______________?

a)

increases

b)

decreases

c)

stays the same

d)

is not affected

28.

When the distance increases between 2 objects, the gravitational pull _________________.

a)

decreases

b)

increases

c)

stays the same

d)

is not affected

29.

When the distance decreases between 2 objects, the gravitational pull _________________.

a)

decreases

b)

increases

c)

stays the same

d)

is not affected

30.
Gravity attracts all objects towards one another.
a)
False
b)
True
c)
It depends
31.
Because of inertia, a resting object will remain at ________.
a)
rest
b)
a constant speed
c)
school
d)
inertia 
32.
Because of inertia, a moving object will keep ________.
a)
at rest
b)
moving
c)
in one spot
d)
inertia 
33.

Anything with ____________ also has a gravitational pull.

a)

mass

b)

size

c)

depth

d)

light

34.

What is weight?

a)

how much fat is on your body

b)

how strong you are

c)

how strongly your body is being pulled down by gravity

d)

when you have to stand in line

35.

Gravity is based on an object's

a)

mass

b)

size

c)

roundness

d)

brightness

36.

Inertia tells us that we need ____________ to get an object moving or to make it stop.

a)

a force

b)

gravity

c)

friction

d)

strength

37.

What keeps the planets in orbit around the sun?

a)

gravity and inertia together

b)

gravity

c)

inertia

d)

neither gravity or inertia

38.

Why do the planets in our solar system orbit the sun?

a)

because the sun is the brightest object

b)

because the sun was there first

c)

because the sun has the most mass

d)

because nothing can orbit planets

39.

What would happen to Earth if there were no inertia?

a)

Earth would crash into the sun

b)

Earth would fly out to space

c)

Earth would collapse

d)

Earth would orbit the moon

40.

What would happen to Earth if there were no gravity?

a)

Earth would crash into the sun

b)

Earth would fly out to space

c)

Earth would collapse

d)

Earth would orbit the moon

41.
What happens when two north poles of a magnet are placed together?
a)
they repel
b)
they attract
c)
they cancel each other out
d)
the strength of the magnet is doubled
42.
When two magnets attract, they ______________
a)
push apart
b)
change color
c)
get colder
d)
pull together
43.

Why does a compass needle, point towards the north?

a)

The compass is a bar magnet.

b)

North is up.

c)

It deflects.

d)

It lines up with the Earth's magnetic field.

44.

This large crane magnet functions only when the electrical current is ON. The crane magnet is an example of what type of magnet?

a)

NIB Magnet

b)

Ceramic Magnet

c)

Electromagnet

d)

Disc magnet

45.

How can the strength of an electromagnet be increased? (mark all that apply)

a)

increase the current flowing through the coil

b)

increase the number of coils

c)

add an amplifier to it

d)

put iron core inside the coil

46.
What causes electricity?
a)
moving neutrons
b)
moving protons
c)
moving atoms
d)
moving electrons
47.
What type of charge do electrons have?
a)
negative
b)
positive 
c)
neutral
d)
nothing
48.

The farther away two magnets are from each other, the force of attraction _________.

a)

stays the same

b)

increases

c)

decreases

49.

Which situation would have the most potential energy for the bar magnets? Think of the rules for electrons

a)
b)
c)

when magnets are close together

d)

when magnets are furthest apart

50.

Energy stored because of gravity is called:

a)

Gravitational Potential Energy

b)

Kinetic Energy

c)

Mechanical Advantage

d)

Chemical Energy

51.

At which point does the ball has the greatest gravitational potential energy (GPE)?

a)

A

b)

G

c)

D

d)

C

e)

G

52.

Which would have the LEAST gravitational potential energy (GPE)?

a)

A ball sitting on the ground

b)

Moon viewed from the Earth

c)

An airplane flying 30,000 feet above the ground

d)

A rock sitting on top of Mt. Everest

53.

How could you increase the gravitational potential energy of an object without changing its mass and gravity?

a)

Make the object larger

b)

Lower the object towards the ground

c)

Raise the object farther off the ground

d)

Allow the object to roll on the ground

54.
What will happen to the magnetic potential energy of the magnets when the N and N get close?
a)
increases
b)
decreases
c)
stays the same
55.

What is potential energy?

a)

The energy an object has due to its atomic structure.

b)

The energy an object has due to its chemical composition.

c)

The energy an object has due to its motion.

d)

The energy an object has due to its position or condition.

56.

What is kinetic energy?

a)

The energy an object has due to its position or condition

b)

The energy an object has due to its motion

c)

The energy an object has due to its chemical composition

d)

The energy an object has due to its atomic structure

57.

When does an object have no kinetic energy?

a)

When it's at rest.

b)

When it's moving very slowly.

c)

When the only force that's acting on it is gravity.

d)

When it has no electrical charge.

58.

Which object has the most potential energy?

a)

A ball resting on the ground.

b)

A ball being thrown at 100 miles per hour.

c)

A ball on top of a refrigerator.

d)

A ball resting on the edge of a cliff.

59.

When does a yo-yo have the most potential energy?

a)

When it's at its highest point.

b)

When it's at its lowest point.

c)

When it's moving between its highest and lowest points.

d)

When it's moving at its top speed.

60.

When is potential energy transformed into kinetic energy?

a)

When an object at rest is lifted to a higher elevation.

b)

When an object at rest remains at rest.

c)

When an object at rest is put into motion.

d)

When an object in motion is stopped and put at rest.

61.

Why do objects at high elevations have more potential energy than objects at low elevations?

a)

Because the thinner air at higher elevations means objects have a greater potential to move very fast

b)

Because objects at high elevations are closer to the sun, which is the source of all energy on earth

c)

Because objects at high elevations tend to move slower than objects at low elevations

d)

Because gravity gives objects at high elevations the potential to fall much further

62.

Which of the following best explains the relationship of speed and kinetic energy

a)

the faster the object has, the less kinetic energy it has

b)

the slower the object moves, the more kinetic energy it has

c)

the faster an object moves, the more kinetic energy it has

d)

the more kinetic energy the object has, the more potential energy it is releases

63.
Is the following graph direct, inverse, or neither?
a)
Direct
b)
Inverse
c)
Neither
64.

What relationship does the table represent?

a)

Direct

b)

Inverse

c)

Neither

65.

What relationship does the table represent?

a)

Direct

b)

Inverse

c)

Neither

66.
Why are there 365 1/4 (365.25) days in a year?
a)
Earth's rotation takes this long.
b)
The tilt of the Earth.
c)
Earth's revolution takes this long.
d)
Our tilt is 23 degress.
67.
Day and night are caused by 
a)
Earth's revolution around the sun
b)
Earth's rotation on its axis
c)
the tilt of the earth
d)
Earth's involvement in eclipses
68.
A year is measured by
a)
Earth's revolution around the sun
b)
Earth's rotation on its axis
c)
the tilt of the earth
d)
Earth's involvement in eclipses
69.
How long does it take for the earth to complete one rotation?
a)
365 1/4 days
b)
24 hours
c)
30 days
d)
one decade
70.
What causes the seasons to change?
a)
The Earth's distance from the Sun
b)
The waming and cooling of Earth's core
c)
The Earth's tilt in relation to the sun
d)
The Earth rotation on its axis.
71.
When the Northern Hemisphere is pointing towards the sun, what season is the Southern Hemisphere?
a)
Winter
b)
Spring
c)
Fall
d)
Summer
72.
Why does the area around the equator stay the same temperature year-round?
a)
It remains the same distance from the sun year round.
b)
It recieves the same amount of direct sunlight year round.
c)
Its days are more than 18 hours long year round
d)
The equator rotates slower than the poles
73.

A car is timed around a race track for 8 laps. The laps are numbered in order. Look at the relationship between Lap Number and Lap Time (seconds).


What type of relationship is this?

a)

Direct

b)

Inverse

c)

Diagonal

d)

Horizontal

74.

Look at the relationship between time spent on social media, and school test performance.


What type of relationship is being displayed?

a)

Direct

b)

Inverse

c)

Diagonal

d)

Quadrant

75.

The connection between two variables that shows the same effect

a)

Direct Relationship

b)

Inverse Relationship

c)

Examine

d)

Extrapolation

76.

The connection between two variables that shows the opposite effect

a)

Inverse Relationship

b)

Predict

c)

Proportional

d)

Relationship

77.

This model is showing us a...

a)

lunar eclipse

b)

solar eclipse

c)

phases of the moon

d)

earth eclipse

78.

This image is showing us a.....

a)

solar eclipse

b)

lunar eclipse

c)

phases of the moon

d)

earth eclipse

79.

When the moon passes between the earth and the sun, this results in a.....

a)

Waxing moon

b)

lunar eclipse

c)

solar eclipse

d)

sun rise

80.

When the earth is between the sun and the moon, this results in a...

a)

waxing moon

b)

solar eclipse

c)

lunar eclipse

d)

sun rise

81.

If you look up at the sky and see this, you are witnessing a....

a)

solar eclipse

b)

total eclipse

c)

lunar eclipse

d)

jupiter

82.

If you are looking up at the sky and see this, you are looking at a....

a)

solar eclipse

b)

total eclipse

c)

lunar eclipse

d)

jupiter

83.

In order to have an eclipse, the Moon, Sun and Earth have to be?

a)

Below each other

b)

Above each other

c)

In alignment

84.
This is a diagram of the moon phases Which moon phase would a lunar eclipse occur in?
a)
New Moon
b)
1st quarter
c)
Full moon
d)
3rd quarter
85.
This is a diagram of the moon phases. In which phase would a solar eclipse occur?
a)
New Moon
b)
1st quarter
c)
Full Moon
d)
3rd Quarter

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