Machines

Machines! 

Can you think about what life would be like without machines? Think about your day and the tasks machines help you with! Can you even think of a few machines you use every day? Which machines can you absolutely not imagine your life without? From cars to spanners, machines are an essential part of our everyday lives! Let review the machines you learned about in this chapter so you can go out into the world and know your stuff when it comes to machines! 

Simple Machines

As you can see from the picture there are six simple machines! Lets review them below. 

Levers

A lever is a rigid bar with a pivot point which is where the lever turns.

Pulleys 

A pulley uses a wheel and an anxel and a rope. The axle passes through the centre of the wheel and the rope runs round a groove in the outisde of the wheel. 

What are pulleys used for? We use pulleys to _____ or ______ heavy objects. 

We use pulleys to lift or lower heavy objects. 

Inclined planes 

An inclined plane is a ramp used to lift and lower objects.

Watch this video to learn more about inclined planes and practice your English listening!

Screws

A screw is an inclined plane wrapped around a pole. 

Wedges

 A wedge has two inclined planes. 

Aside from machines people also use tools in their everyday lives. There are hand tools and power tools. Power tools use electricity to run. Some examples of hand tools are a knife, screwdriver, a paint brush and a plier. Examples of power tools are an electric drill an electric saw and an electric screwdriver. Look at the pictures below and identify if the tools are hand tools or power tools. 

To finish off the unit review, watch this video on electricity!

I hope you enjoyed learning about machines, tools, and elctricity!