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### Upper Elementary Science - II4.10 Simple Machines Review

 Q 1: A __________ machine is made of two or more simple machines.simpledoublecompoundtriple Q 2: What is two things rubbing together that causes something to slow down or stop?energyfrictionleverwork Q 3: The point where a lever rocks back-and-forth is the _________.loadfulcrumworkforce Q 4: A doorknob is an example of what kind of simple machine?inclined planewheel and axlescrewpulley Q 5: Flags are often raised by using __________.pulleysleversaxleswheels Q 6: Is a pulley used to lift loads or to fasten things together?lift heavy loadsfasten things together Q 7: You pushed 10 pound ball 3 feet. Your friend pushed a 5 pound ball 3 feet. Who did more work?Your friendYou Q 8: A force isfrictiona push or a pullthe force of one object pulling on another Question 9: This question is available to subscribers only! Question 10: This question is available to subscribers only!