A ramp is an __
Inclined plane
A round wheel attached to a post
Wheel and axle
To use force to move an object
work
Two slanted sides that end in a sharp edge
wedge
A stiff bar that rests on a support
lever
A bicycle is an example of a __ machine
complex
A ___ is a machine that changes the direction of motion of an object to which a force is applied.
pulley
A wedge is an example of a __ machine.
simple
A ___ is an inclined plane wrapped around a center post.
screw
Which is a simple machine that allows you to hold things together Which is a simple machine that allows you to hold things together? A pulley a screw an inclined plane a wheel and axle
A screw
What can you do with a lever?
Lift up a box
Which simple machine is used to raise a flag on a flagpole?
A pulley
What type of simple machine is a screwdriver?
Wheel and axle
Which is a kind of a simple machine Which is a kind of a simple machine? Inclined plane wedge pulley wheel and axle
Inclined plane
What simple machine is a jar lid?
A screw
Which is not an example of work Which is not an example of work? Lifting a book drawing with a marker opening a door adding numbers in your head
Adding numbers in your head
What type of simple machine is a seesaw?
lever
What is the main purpose of a wedge?
To split an object apart
Examples of a complex machine..
Bicycle stapler scissors
Sam is helping his family load boxes into a truck Sam is helping his family load boxes into a truck. He lifts the box and puts it in the truck. Then he climbs in the truck to move it. What simple machine could he use?
An inclined plane. He wouldn’t have to keep getting up and down.
What simple machine can be used to keep a door propped open?
A wedge can be put between the door and the floor to keep the door open
You are trying to push a heavy box. The box does not move at all You are trying to push a heavy box. The box does not move at all. Are you doing work? Support your answer.
No work is done because the box did not move
Review
This is the state of matter in which the volume stays the same but the shape changes.
liquid
The energy of motion
kinetic
When a natural resource is ___, it means that we do not have a lot of it.
scarce
The state of matter in which the volume and shape stay the same.
solid
Something in nature that people use is known as __
resources
Which will a magnet most likely attract Which will a magnet most likely attract? Rubber eraser plastic cup chalk metal paper clip
Metal paper clip
What does a ruler measure?
distance
Which would require the least amount of force to move Which would require the least amount of force to move? A book a car a pencil a table
a pencil