Which simple machine is a bar or board that moves on a fixed point called a fulcrum?
Lever
100
What simple machine is a rope or chain and a wheel around which the rope fits?
Pulley
100
What simple machine is a large wheel attached to a smaller wheel or rod?
Wheel-and-Axle
100
What simple machine is a flat surface that has one end higher than the other?
Inclined Plane
100
What simple machine is made by wrapping an inclined plane around a pole?
Screw
200
What simple machine is two inclined planes pushed back to back and is used to push two objects apart?
Wedge
200
Give two examples of a lever.
Examples: tongs, fork, rake, seesaw
200
Give 2 examples of an inclined plane.
Examples: stairs, ramp, slide, roof
200
Give 2 examples of a screw.
Examples: screw, lid on jar, corkscrew
200
Give 2 examples of a pulley.
Examples: sail on sailboat, flagpole, crane
300
Give 2 examples of a wheel-and-axle.
Examples: car, fan, windmill, doorknob
300
Give 2 examples of a wedge.
Examples: doorstop, knife, ax, can-opener
300
The end of lightbulb uses which simple machine?
Screw
300
A wheelchair ramp is an example which simple machine?
Inclined Plane
300
A seesaw is an example of which simple machine?
Lever
400
An ax blade is which simple machine?
Wedge
400
A doorknob uses which simple machine?
Wheel-and-Axle
400
A flagpole hoist uses which simple machine?
Pulley
400
Draw a VENN DIAGRAM. Compare/Contrast 2 simple machines. Include one way they are similar and one 1 way they are different.
Answers will vary.
400
Explain how the slope of an inclined plane changes the EFFORT FORCE needed to complete the work.
The slope of an inclined plane INCREASES the distance covered, while it DECREASES the effort/force needed to move an object.
500
Explain how the position of the fulcrum on a lever changes the effort/force needed to complete the work.
When you move the fulcrum closer to the load, you make the effort arm longer. The closer the fulcrum gets to the effort, the bigger the effort will need to be.
500
Imagine you must move a refrigerator from the first floor of a building to the second. Explain how you would use simple machines to move the refrigerator.
Answers may vary.
500
How do simple machines make work easier?
Simple machines make work easier by decreasing the effort/force needed to move an object OR increasing the distance needed to move an object.
500
What are the six simple machines?
Lever, Wheel-and-Axle, Pulley, Wedge, Inclined Plane, and Screw
500
Are you a LEVER LOVER? What simple machine makes your life easier? Write a RACES response to this question and turn in to your teacher before the test (Friday) to earn 2 bonus points!
WOW! My science teacher is so awesome! I want 2 extra points on my test, so I'm getting a piece of paper to start writing my response right now!!!