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What is an inclined plane?
What is a ramp?
What is a wedge?
What is a screw?
What does a ramp do?
What is a pitch?
What are wedges used for?
What are some examples of wedges?
List some examples where zips can be found:
What does a zip consist of?
How many wedges does the zipper slide consist of?
What are the three wedges?
What is a screw designed to do?
What do wood screws do?
What are boat propellers?
What are aircraft propellers?
What does a screw with a small pitch do?
What does a screw with a large pitch do?
What does the screwdriver do?
What is a thread?
