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Lesson
1
Academic and Educational Environment
How Does it Work?
What things do you think about when you hear the word 'machines'?
Achievements TT Select and revise materials TT Read and understand information TT Write information TT Edit texts
about three simple machines and answer the questions 1 inRead pairs. A simple machine is a non- motorized device that changes the direction of a force. It helps us multiply forces. A wedge has a pointed end. It can be driven into something to separate it. An axe is an example. A screw is an inclined plane wrapped around a rod. It holds things together securely. A wheel and axle is a simple machine. It helps to lift or move loads. When we place a heavy load on the axle and push it, the rolling of the wheels reduces the friction. 1. What characteristic do simple machines have? 2. What do they all do? 3. Which of the machines above can be used to cut wood? 4. Which can be used to remove a cork from a bottle? 5. Which is used in a bicycle?
Match the pictures with the machines mentioned in the text in 2 Activity 1.
Search and selection of information. Paraphrase information to explain the operation of a machine.
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