3.4
Earth
Give an example of an inclined plane.
A slide.
An upright pyramid.
The base of a building.
Foundation
Places on a magnet where magnetic force is strongest
Poles
Give an example of a surface that minimizes friction and describe it.
Basketball court, makes it easy to dribble the ball
What kind of force is gravity?
A pulling force.
The skeleton of a building that gives it its shape and support.
Framework
Two opposite sides, or poles, working differently from each other
polarity
Give an example of a surface that increases friction and describe it
A soccer field, the grassy surface slows the ball down
What determines how much gravity an object has?
Mass
A machine that makes lifting heavy things easier.
A pulley
This uses a coiled wire around a metal core to generate magnetism
An electromagnet
Describe how a wheel and axle works.
A wheel revolves around an axle, making it spin.
What gives things their weight?
The part of a lever that holds and balances the weight.
Fulcrum
The attraction of two objects to each other.
Gravity
Explain why a lubricant minimizes friction.
It makes a surface smooth and slippery.
What is the center of gravity?
The point in an object where the pull of gravity is the strongest.
Give an example of a lever.
A seesaw, etc.