Science is Fun
Simple Machines
I know the answer
100

Energy that is ready to be used

potential energy

100

a straight bar that moves on a fixed point.

lever

100

Which is a compound machine? (choose all that are correct) 

bicycle        scissors           can opener           slide

bicycle    scissors   can opener

200

When forces move an object or change an object's motion.

work

200

an inclined plane wrapped into a spiral.

screw

200

___ happens when a force changes the motion of an object.  

work

300

Energy in motion.

kinetic energy

300

a machine with a flat, slanted surface.

inclined machine

300

When does a roller coaster have the most potential energy?

sitting at the top of a hill

400

Something that makes work easier to do.

machine

400

a machine that splits objects apart

wedge

400

What is the object lifted by the lever?

load

500

Machines with few or no moving parts.

simple machine

500

a kind of lever that uses a rope and wheel to lift an object

pulley

500

What is the fixed point on a lever?

fulcrum

600

Two or more simple machines put together.

compound machine

600

a wheel that moves on a post

wheel and axle

600

A flying plane has _____ because it is _____. 


A. kinetic energy    moving

B.  potential energy    moving

A.  kinetic energy     moving

700

When wood is burned, its _____ changes into ____.

A.  potential energy        kinetic energy

B.  kinetic energy      potential

A.  potential energy        kinetic energy

M
e
n
u