Machines

378 views 17 slides Jun 03, 2016
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About This Presentation

SCIENCE YEAR 3


Slide Content

MACHINES

A machine is something we use to make work easier. Machines can be s imple or c omplex :

A simple machine has few or no moving parts.

A complex machine is made up of simple machines. C omplex machines have lots of different parts.

SIMPLE MACHINES T here are some examples of simple machines. A screw A wedge A wheel and axle A lever A pulley   An inclined plane          

AN INCLINED PLANE W e use inclined planes to move objects up and down in different levels. At the skate park you can enjoy them!

A screw W e use screws to hold things together or lift objects.

A wedge W e use wedges to cut objects.

A wheel and axle. W e use wheels and axles to move objects from one place to another.

A lever W e use levers to lift objects. I n a park you have fun playing with the seesaw!

A pulley We use a pulley to lift and lower heavy objects.

inclined plane inclined surface rope wheel load

lever fulcrum rigid bar wheel and axle wheel axle

tools We use a hammer to knock nails into a surface

We use screws to fix objects together . We use a screwdriver to turn screws .

We use nuts and bolts to hold objects together . We use a spanner to turn bolts .

We use a saw to cut wood or other materials .