1. A lever is a rigid bar with a support called fulcrum.We use it to lift or move some objects.We use a wedge to cut objects.A inclined plane move odjects up and downA screw hold things together or lift objects.A pulley uses a wheel and a rope to lift or lower objects.A wheel turns around an axel.We use it to lift or move objects.

2. Electrical appliences. Some of them use the energy from batteries and some use solar energy.Forms of transport.They use fuel like diesel and petrol or human energy.Robots at work . They do jobs that are dangerous for people.they are quiker , more efficiant and safer to use. 3. 1.Handelbars.They are levers that help us change directions.2. Pedals.They are levers .They make the wheel turn around when we push them with our feet.THE 6.Brake levers.They are in the handlebars and are connected to the brakes through cables.3.Gears .They are pulleys that help us when we have to go up or down a hill.BIKE 5. Brakes .They are levers that help us slow or stop the bike.They are in the wheels..4. Gear control.They are levers in the handlebars that are connected to the gears through cables. 4. 1 .The first bicycles were made of wood.They had no pedals and people used their feet to walk at the same time. 2.A bicycle with pedals was invented .This bicycle had metal tyres . 3.A bicycle with a very big front wheel was invented.Its tyres were made of solid rubber. 4.Both wheels were the same size again , but the wheels were still made of solid rubber. 5.The first bicycle with air in its tyres was invented. 5. 32 1 6. MADE BY: RUBN MORENO. ALEJANDRA RODRGUEZ. GONZALO POLANCO.