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SIMPLE MACHINES LESSON January 30, 2001 Ms. Ashbys Third Grade Class
A machine is anything that helps us do work.
A simple machine has few or no moving parts. There are 6 types of simple machines. 1. Inclined plane 2. Wedge 3. Screw 4. Lever 5. Wheel and Axle 6. Pulley
Inclined Planes An inclined plane is a sloping surface that makes it easier to move objects to a higher or lower place. An example of an inclined plane is a ramp.
Inclined Planes A slide is also an inclined plane.
WEDGE A wedge is a simple machine used to raise objects or split an object apart. An ax is a wedge. It is used to split objects apart.
WEDGE A saw and a knife are wedges also.
SCREW A screw is a simple machine that is used to hold things together.
SCREW A jack is another example of a screw.
LEVER The lever reduces the amount of work needed to lift or move an object. A rake is a lever used to move leaves.
LEVER A wheel barrow, a bottle opener, a see saw, and a crow bar are other examples of levers.
WHEEL AND AXLE The wheel and axle is a simple machine made up of a wheel connected to a post. The post is called the axle. A wheel and axle help people lift a heavy load with less work.
WHEEL AND AXLE We use wheels and axles every day. Cars use wheels and axles.
WHEEL AND AXLE A doorknob is a wheel and axle.
PULLEY A pulley is a simple machine made up of a wheel with a rope or cable around the wheel. A pulley is used to raise a flag on a flagpole or to lift heavy objects.
PULLEY A pulley is used to raise a flag on a flagpole. A ski lift uses a pulley also.
WHAT HAVE YOU LEARNED? Name the 6 types of simple machines. Look around the computer lab. Do you see any simple machines? If you do, draw a picture of the simple machine you see.
Simple Machines 1.Simple machines help us do work. 2.Machines make work easy. 3.There are 6 kinds of simple machines.
Welcome to a world full of machines! There are machines all around us! Turn to your neighbor and discuss what kinds of machines you saw on your way to.
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Levers and Pulleys Not so simple machines!. Just think…. Could you lift your science teacher in the air?
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