Salvage Yard:
Magnetism passes through things
Salvage Yard:
magnetic poles
Salvage Yard:
What do magnets attract?
Salvage Yard:
Machines help us work
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Tools We Use
Salvage Yard:
The Wheel
Salvage Yard:
The Lever
Salvage Yard:
The Inclined Plane
Salvage Yard:
The Wedge
Salvage Yard:
The Screw
Salvage Yard:
The Pulley
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Friction cause heat wears away
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Reducing Friction
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oil gasoline electricity run machines
Salvage Yard:
What machines are these?