Forces and Motion: Interactive Learning Quizzes for 3rd Grade Science

Question 1

Which of the following is NOT a force?

Accepted Answer

Sadness

Answer

Gravity

Answer

Friction

Question 2

Which of these is NOT a force that can change how an object moves?

Accepted Answer

Warmth

Answer

Gravity

Answer

Friction

Question 3

How does friction impact the movement of objects?

Accepted Answer

Friction always works against the movement of an object.

Answer

Friction makes objects move faster.

Answer

Friction only happens when two solid surfaces touch.

Question 4

Imagine a cyclist at rest starts pedaling. Draw a diagram that shows all the forces acting on the cyclist and the bicycle.

Accepted Answer

Gravity pulling down, normal force pushing up, and force of the cyclist pushing forward on the pedals.

Answer

Only gravity pulling down and the normal force pushing up.

Answer

Only the force of gravity and the force of the cyclist pushing forward on the pedals.

Question 5

When a ball is thrown into the air, what force causes it to fall back to the ground?

Accepted Answer

The force of gravity

Answer

The force of the thrower's arm

Answer

Air resistance

Answer

The force of the wind

Question 6

An object is not moving. If you push or pull the object, what will happen?

Accepted Answer

The object will move in the direction you pushed or pulled it.

Answer

The object will stay still.

Answer

The object will move in the opposite direction you pushed or pulled it.

Answer

The object will move in a random direction.

Question 7

A box is resting on a flat surface and doesn't move. What does this tell us about the forces acting on the box?

Accepted Answer

The forces are balanced.

Answer

The forces are unbalanced.

Question 8

A toy car is rolling at a constant speed. What will happen to the speed of the toy car if the force applied to it is doubled?

Accepted Answer

The toy car will speed up.

Answer

The toy car will slow down.

Answer

The toy car's speed will stay the same.

Question 9

A box is being pulled across a rough surface and a smooth surface with the same force. On which surface will the box experience greater friction?

Accepted Answer

Rough surface, because it has more irregularities

Answer

Smooth surface, because it is easier for the box to move across

Answer

Both surfaces, because the force of friction is independent of the surface

Answer

Neither surface, because the force of friction is zero on both surfaces

Question 10

How do rockets propel spacecraft into space?

Accepted Answer

Rockets push out gas in one direction, which pushes the rocket in the opposite direction.

Answer

Rockets push against the ground to move forward.

Answer

Rockets use Newton's first law of motion, which states that an object at rest will stay at rest unless a force acts on it.

Answer

Rockets only work in the presence of gravity, because gravity provides the resistance for the rocket to push against.

Question 11

When the forces acting on an object are balanced, what will happen to the object?

Accepted Answer

The object will stay still or keep moving at the same speed and in the same direction.

Answer

The object will speed up.

Answer

The object will slow down.

Answer

The object will change direction.

Question 12

How does air resistance impact the distance a projectile travels?

Accepted Answer

Air resistance reduces the distance the projectile travels.

Answer

Air resistance makes the projectile go faster.

Answer

Air resistance helps the projectile move in a straight path.

Question 13

A person is standing on an elevator that is moving. Which force is acting on the person?

Accepted Answer

Gravity

Answer

Friction

Answer

Air resistance

Answer

Electromagnetism

Question 14

When a car suddenly stops, what happens to the people inside?

Accepted Answer

They keep moving forward because they were already moving.

Answer

They move backward because the car is pushing against them.

Answer

They don't move because the car is no longer moving.

Question 15

What happens to a toy car rolling down a ramp when friction acts on it?

Accepted Answer

It slows down.

Answer

It speeds up.

Answer

It doesn't move.

Answer

It changes direction.

Question 16

When you swing a ball on the end of a string, what force causes the ball to move in a circle around your hand?

Accepted Answer

Centripetal force

Answer

Friction

Answer

Gravity

Answer

Air resistance

Question 17

When you push a heavy box across the floor, what force causes it to slow down and eventually come to a stop?

Accepted Answer

Friction

Answer

Gravity

Answer

Air resistance

Question 18

When you push a ball sitting on the ground, what will happen to the ball?

Accepted Answer

It will move in the direction you push it.

Answer

It will move in the opposite direction you push it.

Answer

It will not move.

Answer

It will move in a random direction.

Question 19

A ball is rolling on the floor. What force is making the ball slow down and eventually stop?

Accepted Answer

Friction

Answer

Gravity

Answer

Air resistance

Answer

Centripetal force

Question 20

When you throw a ball, what happens to its path because of air resistance?

Accepted Answer

Air resistance slows down the ball.

Answer

Air resistance speeds up the ball.

Answer

Air resistance doesn't change the ball's path.

Question 21

A book is resting on a table. Which of the following describes the forces acting on the book?

Accepted Answer

Gravity is pulling the book down, and the table is pushing it up with an equal force.

Answer

No forces are acting on the book.

Answer

Gravity is pulling the book down, but there is no force pushing it up.

Answer

The table is pushing the book up, but there is no force pulling it down.

Question 22

Who discovered the three laws of motion?

Accepted Answer

Isaac Newton

Answer

Albert Einstein

Answer

Galileo Galilei

Question 23

What is the unit of force?

Accepted Answer

Newton

Answer

Kilogram

Answer

Meter

Question 24

In which direction does gravity pull?

Accepted Answer

Downward

Answer

Upward

Answer

Leftward

Answer

Rightward

Question 25

What is the relationship between force, mass, and acceleration?

Accepted Answer

Force = mass x acceleration

Answer

Mass = force x acceleration

Answer

Acceleration = force x mass

Answer

Force = mass + acceleration

Question 26

What force makes objects fall towards the ground?

Accepted Answer

Gravity

Answer

Push

Answer

Pull

Answer

Friction

Question 27

When you push a book along a flat surface, which force are you applying?

Accepted Answer

Push

Answer

Pull

Answer

Lift

Answer

Drag

Question 28

Which of Newton's laws of motion explains that objects in motion will remain moving at the same speed and direction unless a force acts on them?

Accepted Answer

First law

Answer

Second law

Answer

Third law

Answer

Law of universal gravitation

Question 29

What happens to an object when a larger force is applied to it in the same direction?

Accepted Answer

Speeds up

Answer

Slows down

Answer

Changes direction

Answer

Stops moving

Question 30

What is the unit of measurement used for force?

Accepted Answer

Newton

Answer

Kilogram

Answer

Meter

Answer

Second

Question 31

Which of these has the most potential energy?

Accepted Answer

A ball at the top of its bounce

Answer

A ball on the ground

Answer

A ball halfway up in the air

Answer

A book on a shelf

Question 32

Which of these is an example of a balanced force?

Accepted Answer

A book sitting on a table

Answer

A ball rolling down a hill

Answer

A person pushing on a wall

Answer

A car speeding up

Question 33

What do we call the unit of force in the metric system?

Accepted Answer

Newton

Answer

Kilogram

Answer

Meter

Answer

Second

Question 34

Which of these machines uses a lever to lift heavy objects?

Accepted Answer

Wheelbarrow

Answer

Pulley

Answer

Inclined plane

Answer

Wedge

Question 35

What is the opposite of a push?

Accepted Answer

Pull

Answer

Friction

Answer

Gravity

Answer

Inertia

Question 36

Who is known for developing the laws of motion?

Accepted Answer

Isaac Newton

Answer

Albert Einstein

Answer

Galileo Galilei

Answer

Leonardo da Vinci

Question 37

You're standing still, facing a wall. You push against it with your hands. Why do you stay in place instead of moving backward?

Accepted Answer

The ground pushes back on your feet.

Answer

The wall is too heavy to move.

Question 38

If a ball is thrown into the air and then falls back to the ground, what forces are acting on the ball?

Accepted Answer

Gravity and air resistance

Answer

Gravity only

Answer

Air resistance only

Answer

No forces

Question 39

A car is parked on a hill facing downhill. The engine is off and the brakes are off. What will happen to the car?

Accepted Answer

It will roll down the hill.

Answer

It will stay still.

Answer

It will roll up the hill.

Answer

It will move sideways.

Question 40

When you rub your hands together, what force slows them down?

Accepted Answer

Friction

Answer

Gravity

Answer

Air resistance

Question 41

You're pushing a heavy box across the floor. What would make it easier to push?

Accepted Answer

Add oil to the floor

Answer

Add water to the floor

Answer

Add sand to the floor

Question 42

Which of these is NOT a type of force?

Accepted Answer

Temperature

Answer

Push

Answer

Pull

Answer

Gravity

Question 43

What is the unit of measurement we use for force?

Accepted Answer

Newton

Answer

Kilogram

Answer

Meter

Answer

Second

Question 44

Which of these objects has the most inertia?

Accepted Answer

A bowling ball

Answer

A soccer ball

Answer

A feather

Answer

A ping-pong ball

Question 45

What's the difference between speed and velocity?

Accepted Answer

Speed measures only distance, while velocity measures both distance and direction.

Answer

Velocity measures only distance, while speed measures both distance and direction.

Answer

They're the same thing.

Answer

Speed measures only direction, while velocity measures both distance and direction.

Question 46

How does gravity affect objects?

Accepted Answer

Pulls objects toward one another.

Answer

Pushes objects away from one another.

Answer

Has no effect on objects.

Answer

Makes objects float in the air.

Question 47

How does friction affect the movement of an object?

Accepted Answer

It can slow down or stop an object.

Answer

It can speed up an object.

Answer

It has no effect on an object's motion.

Answer

It makes an object float in the air.

Question 48

What force causes a car to roll down a hill?

Accepted Answer

The pull of gravity

Answer

The push of the person driving the car

Answer

The friction of the road

Question 49

When a cyclist pushes on the pedals, what happens to the cyclist and the bicycle?

Accepted Answer

Both the cyclist and the bicycle move forward.

Answer

Only the cyclist moves forward.

Answer

Only the bicycle moves forward.

Question 50

Which of the following is NOT a type of force?

Accepted Answer

Emotion

Answer

Push

Answer

Pull

Answer

Gravity

Question 51

Which of Newton's laws of motion states that an object at rest stays at rest, and an object in motion stays in motion unless acted upon by an unbalanced force?

Accepted Answer

First law

Answer

Second law

Answer

Third law

Question 52

Which of the following is an example of gravity?

Accepted Answer

A ball falling to the ground

Answer

A car driving down the road

Answer

A book sitting on a table

Answer

A person walking

Question 53

What happens to an object when the forces acting on it are balanced?

Accepted Answer

It stops moving

Answer

It moves

Answer

It changes shape

Answer

It accelerates

Question 54

What is the difference between speed and velocity?

Accepted Answer

Speed is a scalar quantity and velocity is a vector quantity

Answer

Speed is a vector quantity and velocity is a scalar quantity

Answer

Speed and velocity are both scalar quantities

Answer

Speed and velocity are both vector quantities

Question 55

Which of the following is a unit of force?

Accepted Answer

Newton

Answer

Kilogram

Answer

Meter

Answer

Second

Question 56

What is the formula for calculating the force of gravity?

Accepted Answer

F = mg

Answer

F = ma

Answer

F = mv

Answer

F = mv^2

Question 57

Which of Isaac Newton's laws of motion states that an object will not move unless a force acts on it?

Accepted Answer

First law

Answer

Second law

Answer

Third law

Answer

Fourth law

Question 58

What do we call the unit we use to measure force?

Accepted Answer

Newton

Answer

Kilogram

Answer

Meter

Answer

Second

Question 59

Which of these objects will be hardest to get moving?

Accepted Answer

A bowling ball

Answer

A tennis ball

Answer

A feather

Answer

A balloon

Question 60

What happens when the force acting on an object gets bigger?

Accepted Answer

The object will speed up.

Answer

The object will slow down.

Answer

The object will not change its speed.

Answer

The object will change direction.

Question 61

How can we make more friction between two surfaces?

Accepted Answer

Make the surfaces rougher

Answer

Make the surfaces smoother

Answer

Add oil to the surfaces

Answer

Make the objects on the surfaces lighter

Question 62

How are speed and velocity different?

Accepted Answer

Speed only tells you how far something has moved, while velocity tells you how far it has moved and in what direction.

Answer

Velocity only tells you how far something has moved, while speed tells you how far it has moved and in what direction.

Answer

Speed and velocity are the same thing.

Answer

Velocity tells you how quickly speed changes, while speed tells you how quickly velocity changes.

Question 63

What does the law of conservation of energy say?

Accepted Answer

Energy can't be created or destroyed, but it can change forms.

Answer

Energy can be created, but it can't be destroyed.

Answer

Energy can be destroyed, but it can't be created.

Answer

Energy can both be created and destroyed.

Question 64

A toy car is rolling smoothly on a flat surface. If you suddenly push the car with twice as much force, what will happen to its acceleration?

Accepted Answer

It will accelerate twice as fast in the direction of the push.

Answer

It will slow down and eventually stop.

Answer

Its acceleration will remain the same.

Answer

It will change direction and move in the opposite direction of the push.