Forces and Motion
Each subtopic includes About section, revision page link, 10 preview questions, and practice CTAs.
Push and Pull Forces
SubtopicPush and Pull Forces under Forces and Motion for Grade 3 IB.
Preview questions (no answers)
- 1.
If you lift a bucket of water straight up from the ground, what force are you using?
A.A push
B.A pull
C.A twist
D.No force
- 2.
What type of force is used when you flick a small coin with your finger to make it slide across a table?
A.Pull
B.Push
C.Gravity
D.Magnetic
- 3.
To unzip your school backpack, you need to apply which force to the zipper?
A.A push
B.A pull
C.A squeeze
D.A shake
- 4.
Which force is mainly used to move a baby stroller forward down the sidewalk?
A.A push
B.A pull
C.Gravity
D.Electricity
- 5.
A student uses a magnet to pick up a steel paperclip. What kind of force is the magnet exerting on the paperclip?
A.A pushing force
B.A pulling force
C.A friction force
D.No force at all
- 6.
When you use a stapler, you press down on the top. This is an example of:
A.A pull force
B.A push force
C.A magnetic force
D.Friction force
- 7.
If you throw a ball horizontally, why does it eventually hit the ground instead of flying straight forever?
A.Because of the push from the air
B.Because gravity pulls it down
C.Because the ball gets tired
D.Because there is no force acting on it
- 8.
You roll a ball across a floor and it hits a wall and bounces back. Which force caused the ball to change its direction?
A.The wall applied a push force to the ball.
B.The ball's own friction pushed it away from the wall.
C.Gravity pulled the ball away from the wall.
D.The air between the ball and the wall pushed it back.
- 9.
A person is standing on a scale in an elevator. As the elevator suddenly starts to move upward, the scale shows a higher weight for a second. Why?
A.The person actually gained mass because of the elevator's speed.
B.The elevator floor is pushing up on the person with more force to start the upward motion.
C.Gravity becomes stronger when you are inside an elevator.
D.The air pressure in the elevator is pushing the person down onto the scale.
- 10.
If you push a heavy cart and a light cart with the same amount of force for the same amount of time, which one will have a greater change in its speed?
A.The heavy cart, because it has more mass to carry the speed.
B.The light cart, because it has less mass to resist the change in motion.
C.Both will change speed by the exact same amount.
D.Neither will move because the forces are balanced.
Download the worksheet for Forces and Motion - Push and Pull Forces to practice offline. It includes additional chapter-level practice questions.
Gravity and Friction
SubtopicGravity and Friction under Forces and Motion for Grade 3 IB.
Preview questions (no answers)
- 1.
Which force helps a goalkeeper catch a fast-moving soccer ball by providing grip on their gloves?
A.Gravity
B.Friction
C.Magnetism
D.Centrifugal force
- 2.
How does gravity affect a waterfall?
A.It makes the water turn into steam
B.It pulls the water down over the edge
C.It pushes the water back up the mountain
D.It makes the water change color
- 3.
Which of these is NOT caused by friction?
A.Heat when rubbing things together
B.Objects slowing down
C.Things falling to the floor
D.Better grip on a handle
- 4.
What would happen to the oceans if Earth had no gravity?
A.The water would stay in the same place
B.The water would freeze
C.The water would float away into space
D.The water would get deeper
- 5.
A student uses a spring scale to measure the force needed to pull a wooden block across different surfaces. The results are shown in the diagram. What is the most likely reason it takes more Newtons () of force to move the block across the sandpaper than the glass?
A.The sandpaper surface is much smoother than the glass surface.
B.The sandpaper creates a greater force of friction against the block.
C.Gravity pulls the block down with more strength when it is on the sandpaper.
D.The wooden block becomes lighter when it is placed on the glass.
- 6.
Which of these best explains why we stay on the ground and don't float into the sky?
A.The air is pressing down on us
B.Our shoes are sticky
C.Earth's gravity pulls us toward its center
D.Friction holds our feet to the floor
- 7.
When you are riding a bicycle and you squeeze the hand brakes, what happens?
A.The brake pads use friction to slow the wheels
B.The brakes turn off gravity for a moment
C.The wheels become smoother to slide better
D.The bicycle gains more mass
- 8.
Even surfaces that feel smooth to our touch, like a glass window or a polished table, actually have tiny 'microscopic peaks' when viewed under a powerful lens. Based on the diagram, how do these tiny peaks create the force of friction?
A.They act like tiny springs that push the object forward to help it move.
B.They catch and hook onto the peaks of the other surface, resisting the movement.
C.They create a tiny vacuum that sucks the object down to make it feel heavier.
D.They turn into a thin layer of liquid when rubbed, making the surface slippery.
- 9.
A magician pulls a tablecloth out from under some dishes very quickly. The dishes stay on the table. Which force was minimized by the speed of the pull?
A.Gravity
B.Friction
C.Magnetism
D.Air Resistance
- 10.
If you rub a balloon against your hair, it can stick to a wall. This is a different force, but how is it different from gravity?
A.Gravity only pulls, while the balloon force (static electricity) can pull or push.
B.Gravity only works on round objects, while the balloon force works on everything.
C.Gravity requires the objects to be rubbing together, like friction.
D.The balloon force is much stronger than gravity over long distances.
Download the worksheet for Forces and Motion - Gravity and Friction to practice offline. It includes additional chapter-level practice questions.
Magnetic Attraction and Repulsion
SubtopicMagnetic Attraction and Repulsion under Forces and Motion for Grade 3 IB.
Preview questions (no answers)
- 1.
What is the name of the area around a magnet where its force can be felt?
A.Magnetic Zone
B.Magic Circle
C.Magnetic Field
D.Pulling Place
- 2.
If a magnet is sticking to a chalkboard, what must the chalkboard be made of (or contain)?
A.Solid wood
B.A magnetic metal like steel
C.Thick plastic
D.Glass
- 3.
Which part of a 'U-shaped' or horseshoe magnet has the strongest pull?
A.The very middle of the curve
B.The two ends (the poles)
C.The sides of the magnet
D.All parts are exactly the same
- 4.
If a magnet can pull an object from 5 centimeters away, but not from 10 centimeters away, what does this tell us?
A.The magnet is broken at 10 centimeters
B.Magnetic force is weaker at a longer distance
C.The object is too heavy at 10 centimeters
D.The air is blocking the magnet
- 5.
How can a magnet help a geologist identify if a rock contains high amounts of the mineral magnetite (iron ore)?
A.The magnet will stick to the rock if it has enough iron.
B.The magnet will change the rock's color to blue.
C.The rock will start to glow near the magnet.
D.The rock will melt when the magnet touches it.
- 6.
A student places a toy boat with a steel bottom in a tub of water. They hold a magnet under the plastic tub. What will happen?
A.They can move the boat by moving the magnet under the tub.
B.The boat will sink because of the magnetic pull.
C.The water will become magnetic and start to bubble.
D.The magnet will not work through the plastic tub.
- 7.
Two toy cars have magnets taped to their tops. When Car 1 drives toward Car 2, Car 2 starts to roll away without being touched. What is happening?
A.The magnets are repelling each other.
B.The magnets are attracting each other.
C.Car 2 is afraid of Car 1.
D.The magnets have lost their force.
- 8.
A student puts a bar magnet on a small toy boat in a tub of water. They hold another magnet in their hand. If the boat moves away from the student's hand, what can be said about the magnets?
A.The poles facing each other are the same (e.g., North and North).
B.The poles facing each other are opposite (e.g., North and South).
C.One of the magnets must be broken.
D.The water is creating a magnetic shield.
- 9.
Which of these is a 'non-contact' force?
A.Magnetic force
B.Friction force
C.Pushing a swing
D.Kicking a ball
- 10.
If you put a magnet into a pile of iron filings, where will most of the filings stick?
A.All over the magnet evenly.
B.Only in the very center of the magnet.
C.Mostly at the ends (the poles).
D.They will not stick at all if the magnet is clean.
Download the worksheet for Forces and Motion - Magnetic Attraction and Repulsion to practice offline. It includes additional chapter-level practice questions.
Simple Machines
SubtopicSimple Machines under Forces and Motion for Grade 3 IB.
Preview questions (no answers)
- 1.
When you drop a ball, it always falls toward the floor. Which force is responsible for this?
A.Push
B.Friction
C.Gravity
D.Magnetism
- 2.
To move a very heavy rock, a worker uses a long metal bar resting on a smaller stone. This setup is a:
A.Lever
B.Pulley
C.Screw
D.Wedge
- 3.
Which part of a hammer is used as a lever when you are trying to pull a nail out of a piece of wood?
A.The heavy metal head
B.The flat hitting surface
C.The claw part
D.The bottom of the handle
- 4.
Which of the following is NOT a simple machine?
A.A lever
B.A pulley
C.A bicycle
D.A wedge
- 5.
Which of these objects contains a tiny wheel and axle that you use every day to navigate a computer?
A.A computer keyboard
B.A computer screen
C.A scroll wheel on a mouse
D.A computer power cord
- 6.
How does a simple machine change the amount of work we do?
A.It reduces the total amount of energy needed
B.It increases the total amount of work
C.It makes the work easier by changing the or distance
D.It does all the work for us so we don't have to
- 7.
A chisel is a tool used by woodworkers to carve designs. It has a flat, sloped edge. What simple machine is a chisel?
A.A screw
B.A pulley
C.A wedge
D.A wheel
- 8.
An elevator uses a powerful motor and a system of cables. Which simple machine is most likely hidden at the top of the elevator shaft to help it move up and down?
A.A very large wedge
B.A series of pulleys
C.A long inclined plane
D.Multiple screws
- 9.
A screw is essentially a long inclined plane. If you 'unwrapped' the threads of a screw from its cylinder, what shape would you have?
A.A circle
B.A square
C.A long, thin triangle
D.A perfect sphere
- 10.
Which of these simple machines works primarily by using a 'sloping surface' to help move an object over a vertical distance?
A.Lever
B.Inclined Plane
C.Wheel and Axle
D.Pulley
Download the worksheet for Forces and Motion - Simple Machines to practice offline. It includes additional chapter-level practice questions.