Simple Machines Crossword

What is the most basic machine?
What is a plank or ridged beam that is free to rotate on a pivot.
What is a a wheel with a grooved rim around which a cord passes.
What is a a simple lifting machine consisting of a rope that unwinds from a wheel onto a cylindrical drum or shaft joined to the wheel to help lift things.
What is a flat supporting surface tilted at an angle
What is is a flat supporting surface tilted at an angle?
What is a piece of material thick and then tapering to thinner to secure or separate an object?
What is a short, slender, sharp-pointed metal pin with a raised helical thread running around it
What family all has a rigid arm that turns around a point called the fulcrum
How many classes are levers divided into?
How many simple machines are there?
A wheel and axel is a lever connected to a what?
What are pulleys modified as?
A screw is an inclined plane wrapped around a what?
What is an force going outward