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The Real-World Science Supplement
to Scholastic News.
tools that make it easier to move objects
It’s easier to move objects with the help of simple machines.
a simple machine that is made of a grooved wheel and cable
A crane has a pulley to help raise and lower objects.
a slanted surface, like a ramp, that makes it easier to move objects up and down
An inclined plane makes it easier to load a box onto a truck.
a force that pulls two objects toward each other
Gravity pulls this roller coaster toward the ground.
wheel and axle
a circle and post that rotate together
A fan’s wheel and axle allows it to spin.