5th GRADE SCIENCE AND TECHNOLOGY

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Presentation transcript:

5th GRADE SCIENCE AND TECHNOLOGY SIMPLE MACHINES 5th GRADE SCIENCE AND TECHNOLOGY

SIMPLE MACHINES LEVER A lever is a simple machine. It is a board or bar that rests on a turning point. This turning point is called the fulcrum. An object that a lever moves is called the load. The closer the object is to the fulcrum, the easier it is to move.

EXAMPLES OF LEVERS A hammer is a lever when it is used to pull a nail out of a piece of wood. Bottle openers Crow bars

SIMPLE MACHINES SCREW A screw is a simple machine that is made from another simple machine. It is actually an inclined plane that winds around itself. A screw has ridges and is not smooth like a nail. Some screws are used to lower and raise things. They are also used to hold objects together.

EXAMPLES OF SCREWS Jar Lids Light Bulbs Stools Clamps Jacks Wrenches Key Rings Spiral Staircase

SIMPLE MACHINES WEDGE A wedge is a simple machine used to push two objects apart. A wedge is made up of two inclined planes. These planes meet and form a sharp edge. This edge can split things apart.

EXAMPLES OF WEDGES Knives Axes Forks Nails

SIMPLE MACHINES INCLINED PLANE A simple machine that is a flat surface that is higher on one end. You can use this machine to move an object to a lower or higher place. Inclined planes make the work of moving things easier. You would need less energy and force to move objects with an inclined plane.

EXAMPLES OF INCLINED PLANES Ramp Slanted Road Path up a Hill Slide

SIMPLE MACHINES WHEEL AND AXLE The wheel and axle is another simple machine. The axle is a rod that goes through the wheel. This lets the wheel turn. It is easy to move things from place to place with wheels and axles.

EXAMPLES OF WHEEL AND AXLE Cars Roller Skates Wagons Door Knobs Gears in Watches, Clocks, and Bicycles

SIMPLE MACHINES PULLEY This simple machine is made up of a wheel and a rope. The rope fits on the groove of the wheel. One part of the rope is attached to the load. When you pull on one side of the pulley, the wheel turns and the load will move. Pulleys let you move loads up, down, or sideways. Pulleys are good for moving objects to hard to reach places. It also makes the work of moving heavy loads a lot easier.

EXAMPLES OF PULLEYS Flag Poles Clothes Lines Sailboat Blinds Crane