Forces and Motion: Interactive Learning Quizzes for 4th Grade Science

Question 1

Which of the following is NOT a force?

Accepted Answer

Weight

Answer

Gravity

Answer

Friction

Answer

Magnetism

Question 2

A book is resting on a table. Which force keeps the book from sliding off?

Accepted Answer

Friction

Answer

Gravity

Answer

Air resistance

Question 3

A car traveled 120 miles in 2 hours. What was its average speed?

Accepted Answer

60 miles per hour

Answer

30 miles per hour

Answer

90 miles per hour

Question 4

Which of these shows the force of gravity?

Accepted Answer

A skydiver falling towards the ground

Answer

A person pushing a shopping cart

Answer

A car speeding up from a stop

Question 5

When a skydiver reaches terminal velocity, what is the net force acting on them?

Accepted Answer

Zero

Answer

Greater than zero

Answer

Less than zero

Question 6

Imagine you're designing, building, and testing a brand-new car. How would you use your knowledge of forces and motion in each step?

Accepted Answer

In the design phase, I'd consider forces like gravity, friction, and engine power.

Accepted Answer

During construction, I'd choose strong, lightweight materials to help the car move easily.

Accepted Answer

In testing, I'd drive the car on different surfaces like flat roads, hills, and bumps to see how it moves.

Answer

Forces and motion don't apply to cars because they only affect objects in space.

Question 7

Friction is a force that acts between two surfaces when they touch. Give an example of how friction can be helpful and how it can be harmful.

Accepted Answer

Friction helps us walk without slipping, but it also wears down car tires.

Answer

Friction only happens between solid surfaces.

Answer

Friction is always a negative force.

Answer

Friction is not affected by the type of surface.

Question 8

How does a soccer player use force and motion to kick a ball?

Accepted Answer

The player kicks the ball with their foot, applying a force that propels it forward.

Answer

Gravity causes the ball to roll forward.

Answer

The player's momentum moves the ball forward.

Answer

Wind resistance moves the ball forward.

Question 9

A ball is thrown into the air. What forces are acting on the ball when it is at the peak of its trajectory?

Accepted Answer

Gravity and air resistance only

Answer

Gravity and lift only

Answer

Gravity and thrust only

Answer

Gravity, air resistance, lift, and thrust

Question 10

How does an object's mass affect its resistance to changes in motion?

Accepted Answer

The greater an object's mass, the greater its resistance to changes in motion.

Answer

Mass has no effect on an object's resistance to changes in motion.

Answer

The greater an object's mass, the less its resistance to changes in motion.

Answer

Resistance to changes in motion is only affected by an object's shape.

Question 11

When is an object considered to be in equilibrium?

Accepted Answer

When forces acting on it from all sides are equal.

Answer

When no forces are acting on it.

Answer

When it moves at a steady speed.

Answer

When it changes shape.

Question 12

A rocket blasts off into space. During its upward journey, what forces are acting on the rocket, and how do these forces help it ascend successfully?

Accepted Answer

The rocket's engines push it up (thrust), gravity pulls it down, and air resistance slows it down.

Answer

Gravity pulls the rocket up, air resistance pushes it forward, and friction slows it down.

Answer

The rocket's engines pull it up (thrust), gravity pushes it down, and air resistance speeds it up.

Question 13

How does the principle of moments explain how a lever makes lifting objects easier with less force?

Accepted Answer

The principle of moments states that the force needed to lift an object is smaller when applied closer to the fulcrum.

Answer

The principle of moments states that the force needed to lift an object is larger when applied further from the fulcrum.

Answer

The principle of moments does not apply to levers.

Answer

The principle of moments states that the force needed to lift an object is always the same, regardless of where the force is applied.

Question 14

Buoyancy: A Force to Explore

What is buoyancy? How does it affect objects in fluids? Give examples of how this principle is used in technologies like submarines and hot air balloons.

Accepted Answer

Buoyancy is the upward force exerted by a fluid that counteracts the weight of objects immersed in it, allowing them to float.

Accepted Answer

The force of buoyancy is equal to the mass of the fluid an object displaces.

Answer

Buoyancy only affects objects that float on the water's surface, like boats.

Answer

Buoyancy has no practical applications in real-world technologies.

Question 15

How does a force affect an object's energy?

Accepted Answer

Changes its movement, like speed or direction.

Answer

Raises its temperature.

Answer

Alters its chemical composition.

Answer

Modifies its mass.

Question 16

What is the best example of a rotational force?

Accepted Answer

Turning a doorknob to open a door.

Answer

Pushing a swing back and forth.

Answer

Lifting a heavy box off the ground.

Question 17

Which of the following is not a force?

Accepted Answer

Growth

Answer

Push

Answer

Pull

Answer

Gravity

Question 18

What is simple harmonic motion? Give examples of where you can see it in everyday life.

Accepted Answer

Simple harmonic motion is when an object moves back and forth in a straight line, like a swinging pendulum.

Answer

Simple harmonic motion only happens in perfect, frictionless systems.

Answer

Simple harmonic motion is when an object moves in a circle, like a car going around a race track.

Answer

Simple harmonic motion is when an object moves up and down, like a bouncing ball.

Question 19

According to Newton's First Law of Motion, what happens to an object that is not moving if no force is applied to it?

Accepted Answer

It stays still.

Answer

It keeps moving in the same direction and speed.

Answer

It slows down and stops.

Answer

It speeds up and moves in a straight line.

Question 20

What is equilibrium and how does it affect objects in everyday life?

Accepted Answer

Equilibrium is when the forces acting on an object cancel each other out.

Answer

Equilibrium is when there are no forces acting on an object.

Answer

Equilibrium is when an object is moving.

Answer

Equilibrium is when an object has equal forces applied to it from all sides.

Question 21

How does a magnet attract a paperclip?

Accepted Answer

By pulling it closer

Answer

By pushing it away

Answer

By rolling it around

Answer

By spinning it

Question 22

Which of these actions is NOT a type of motion?

Accepted Answer

Thinking

Answer

Jumping

Answer

Sliding

Answer

Floating

Question 23

What direction does gravity pull objects?

Accepted Answer

Down

Answer

Up

Answer

Left

Answer

Right

Question 24

What happens to an object's speed if the force applied to it is increased?

Accepted Answer

It increases.

Answer

It decreases.

Answer

It stays the same.

Answer

It changes direction.

Question 25

Which of these is an example of friction?

Accepted Answer

Dragging a box across the floor

Answer

Kicking a ball

Answer

Throwing a ball in the air

Answer

Riding a bike

Question 26

How does a rocket travel through space?

Accepted Answer

It shoots out exhaust gases to propel itself.

Answer

It pushes off the air around it.

Answer

It uses magnets to move.

Answer

It spins very fast to create lift.

Question 27

What unit do we use to measure force?

Accepted Answer

Newton

Answer

Joule

Answer

Watt

Answer

Ampere

Question 28

What force pulls objects towards the center of the Earth?

Accepted Answer

Gravity

Answer

Magnetism

Answer

Friction

Answer

Inertia

Question 29

Which force slows down moving objects?

Accepted Answer

Friction

Answer

Gravity

Answer

Magnetism

Answer

Inertia

Question 30

What causes a ball thrown into the air to fall back down?

Accepted Answer

Gravity

Answer

Magnetism

Answer

Inertia

Answer

Friction

Question 31

What happens to a moving object if it is no longer being pushed or pulled?

Accepted Answer

It will come to a stop.

Answer

It will keep moving at the same speed.

Answer

It will move faster.

Answer

It will change direction.

Question 32

What is the name of the unit we use to measure force?

Accepted Answer

Newton

Answer

Meter

Answer

Gram

Answer

Second

Question 33

What happens when you press the brakes of a moving car?

Accepted Answer

The car will slow down.

Answer

The car will go faster.

Answer

The car will change direction.

Answer

Nothing will happen.

Question 34

What forces act on a boat floating in water?

Accepted Answer

Gravity and buoyancy

Answer

Friction and gravity

Answer

Magnetism and gravity

Answer

Inertia and buoyancy

Question 35

Which of the following is an example of an unbalanced force?

Accepted Answer

A person pushing a wall

Answer

A book resting on a table

Answer

A ball hanging from a string

Answer

A car driving at a constant speed

Question 36

At the highest point of its path, what forces act on a ball thrown into the air?

Accepted Answer

Gravity and air resistance

Answer

Gravity only

Answer

Gravity and buoyancy

Answer

Friction only

Question 37

Which of these quantities has a direction?

Accepted Answer

Force

Answer

Mass

Answer

Temperature

Answer

Volume

Question 38

What is a force?

Accepted Answer

A push or pull that can cause an object to move

Answer

The speed of an object

Answer

The weight of an object

Answer

The color of an object

Question 39

When an object is pushed or pulled, what happens?

Accepted Answer

It moves

Answer

It changes color

Answer

It gets bigger

Answer

It disappears

Question 40

What is motion?

Accepted Answer

A change in position

Answer

A change in size

Answer

A change in color

Answer

A change in shape

Question 41

What is the difference between speed and velocity?

Accepted Answer

Speed measures distance only; velocity measures distance and direction

Answer

Velocity measures distance only; speed measures distance and direction

Answer

They are the same thing

Answer

Speed is how fast you're going; velocity is how fast you're changing speed

Question 42

Which force acts when two objects touch?

Accepted Answer

Friction

Answer

Gravity

Answer

Magnetism

Answer

Static electricity

Question 43

How are force, mass, and acceleration related?

Accepted Answer

Force equals mass multiplied by acceleration

Answer

Acceleration equals force multiplied by mass

Answer

Mass equals force multiplied by acceleration

Answer

There is no relationship between these three concepts

Question 44

Which of these is an example of projectile motion?

Accepted Answer

A ball thrown into the air

Answer

A car driving down the road

Answer

A ball rolling down a hill

Answer

A book sitting on a table

Question 45

What is the difference between kinetic and potential energy?

Accepted Answer

Kinetic energy is the energy of motion; potential energy is the energy of position

Answer

Potential energy is the energy of motion; kinetic energy is the energy of position

Answer

They are the same thing

Answer

Kinetic energy is measured in joules; potential energy is measured in newtons

Question 46

What force pulls objects towards the middle of Earth?

Accepted Answer

Gravity

Answer

Friction

Answer

Magnetism

Answer

Electricity

Question 47

Which of these forces does NOT require touching?

Accepted Answer

Magnets

Answer

Pushing a book

Answer

Lifting a ball

Answer

Rubbing your hands together

Question 48

What is the term for the amount of stuff in an object?

Accepted Answer

Mass

Answer

Weight

Answer

Volume

Answer

Density

Question 49

When two objects rub together, what force slows them down?

Accepted Answer

Friction

Answer

Gravity

Answer

Magnetism

Answer

Air resistance

Question 50

What resists changes in movement?

Accepted Answer

Inertia

Answer

Acceleration

Answer

Momentum

Answer

Gravity

Question 51

In science, what unit do we use to measure force?

Accepted Answer

Newton

Answer

Pound

Answer

Kilogram

Answer

Meter

Question 52

What is NOT a force that can cause an object to move?

Accepted Answer

Heat

Answer

Push

Answer

Pull

Answer

Friction

Question 53

When a force is applied to an object, what happens to the object?

Accepted Answer

It moves

Answer

It changes shape

Answer

It changes temperature

Answer

It disappears

Question 54

Which of these is an example of friction?

Accepted Answer

Sliding a book across a table

Answer

Rolling a ball down a hill

Answer

Lifting a heavy object

Answer

Kicking a soccer ball

Question 55

What is the formula to find speed?

Accepted Answer

Speed = Distance / Time

Answer

Speed = Time / Distance

Answer

Speed = Distance x Time

Answer

Speed = Time - Distance

Question 56

What is the difference between speed and velocity?

Accepted Answer

Speed measures how fast an object is moving, while velocity measures how fast an object is moving in a specific direction.

Answer

Velocity measures how fast an object is moving, while speed measures how fast an object is moving in a specific direction.

Answer

Speed and velocity are the same thing.

Answer

Velocity measures how fast an object is accelerating, while speed measures how fast an object is moving.

Question 57

According to Newton's First Law of Motion, what happens to an object at rest if no force acts on it?

Accepted Answer

It will stay at rest.

Answer

It will start moving.

Answer

It will change direction.

Answer

It will disappear.

Question 58

According to Newton's Second Law of Motion, what determines how much an object accelerates?

Accepted Answer

Both the mass of the object and the force applied to it

Answer

The mass of the object

Answer

The force applied to the object

Answer

Neither the mass of the object nor the force applied to it

Question 59

What does Newton's Third Law of Motion state?

Accepted Answer

For every action, there is an equal and opposite reaction.

Answer

The force of gravity is always pulling objects towards each other.

Answer

An object's speed and velocity are always the same.

Answer

Friction always slows down moving objects.

Question 60

Which of these is an example of a balanced force?

Accepted Answer

Pushing a box with the same amount of force on both sides

Answer

Pulling a rope with different amounts of force on each end

Answer

Kicking a soccer ball

Answer

Lifting a heavy object

Question 61

What is the upward force exerted by a fluid on an object submerged or floating in it called?

Accepted Answer

Buoyancy

Answer

Gravity

Answer

Floatation

Question 62

When balanced forces act on an object, what will happen to it?

Accepted Answer

It will continue moving at the same speed and in the same direction.

Answer

It will move faster.

Answer

It will change direction.

Answer

It will stop moving.

Question 63

How do forces create torques, and how is this used in real life?

Accepted Answer

Forces can create torques, which make objects spin.

Answer

Torques are forces that push on objects' surfaces.

Answer

Forces and torques are not related.

Answer

Forces and torques are only used in science and have no real-world uses.

Question 64

A car is traveling at a constant speed on a curved track. Which forces are acting on the car?

Accepted Answer

Gravity and a force toward the center of the curve

Answer

Gravity only

Answer

Friction and a force toward the center of the curve