Show:
Vocabulary
Science Concepts
Inquiry Skills
May the Force
be with You
Six Simple
Machines
100
A push or pull that causes motion
What is a force.
100
To make work easier.
What is the purpose of a simple machine.
100
Sarah is using a lever. She will push down on the free end of the lever to raise the load. Compare and explain the force she exerts with the load.
What is the force she applies is less than the load. The lever reduces the amount of force she must exert to lift the load.
100
The force acting on a ball that rolls down a hill.
What is gravity or someone kicking/pushing the ball.
100
Lever
What is a bar,with an arm and fulcrum, that makes it easier to move things.
200
A force that opposes motion.
What is friction.
200
Magnetic force
What is the force exerted by a magnet that attracts objects with iron.
200
Maxwell sets up a pulley to raise a block. Tell how the pulley makes his job easier.
What is although the pulley doesn't multiply Maxwell's effort force, it does change its direction. It is easier to pull down on the rope to raise the object than to push the object upward.
200
Prove that friction has occurred when a saw cuts through wood.
What is the saw and the wood get hot.
200
Wheel and Axle
What is a wheel with a rod, or axle, in the center.
300
The force of attraction between all objects.
What is gravity.
300
A type of machine like a wedge, a chisel, and an axe.
What is an inclined plane.
300
Alexander has placed an empty,sealed plastic bottle in water. What results did he record in his science journal.
What is the bottle was floating because of bouyant forces that acted on it.
300
Two magnets repel each other.
What is that they have like poles facing each other.
300
Wedge
What is two inclined planes that form a cutting edge.
400
A wheel with a groove for a rope.
What is a pulley.
400
A batter hits a baseball, sending it soaring into the air. What forces are acting on the ball.
What are unbalanced forces.
400
Alexander poured sand into the bottle. Explain what happened next.
What is that the bottle begin to sink because the buoyant force was less that the weight of the bottle and its contents.
400
One child pulls a chair to the left with a force of 100 N and another child pulls in the opposite direction with a force of 200 N.
What is a net force of 100 N to the right.
400
Screw
What is an inclined plane wrapped around a post or axle.
500
The balance point of a lever.
What is a fulcrum.
500
A bar that makes it easier to move things.
What is a lever.
500
Two things that determine how much work is needed when lifting your backpack onto your back.
What is force x distance.
500
Types of compound machines you use and the simple machines it is made up of.
What could be scissors (wedge and lever), bicycle (wheel and axle and lever)