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pulley
lever
All screws are used as simple machines.
they can be used anytime
lever
A screw is the simple machine which holds two boards together. In this case it is not acting as a machine though.
The lever.
pulley
A lever.
Ice-breaking ships are used in the Arctic using wedges, a type of simple machine.
lever
No.
A simple machine that was used my Egyptians would be a lever or any type of lever that would help them to lift heavy materials while building the pyramids.
All screws are used as simple machines.
An inclined plane is a type of simple machine that makes it easier to move object up or downhill.
If it goes up just some, it could be considered a ramp, or inclined plane. Otherwise it is not any sort of simple machine. Good question though:)
pulley