Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 214 · 40 questions

What you do (Coins × distance): 1. Balance the ruler on the pencil at its 15 cm mark. 2. Put coins at a measured distance on the left side. 3. Place coins on the right and slide them until the ruler balances. 4. Check: coins × distance on the left = coins × distance on the right; press gently.

1. 1.⚙️ Which of these is a lever? (a) a steering wheel (b) a well pulley (c) a tap handle (d) a bottle opener
2. 2.🛟 Why should coins be kept away from very small children? (a) they may swallow them (b) they are too shiny (c) they are too cold (d) they are magnetic
3. 3.True or false: coins of one kind is not needed for the ruler lever. (a) False (b) True
4. 4.🧺 Do we need a magnet for the ruler lever? (a) not needed (b) needed
5. 5.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) which side goes down (b) the number of coins (c) distance from the pencil
6. 6.⚙️ Which of these is a wheel and axle? (a) a doorknob (b) a see-saw (c) a bottle opener (d) a crowbar
7. 7.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 6 cm to the left of the pencil and 6 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
8. 8.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is what we measure? (a) distance from the pencil (b) the number of coins (c) where the pencil is (d) which side goes down
9. 9.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a balloon (c) a round pencil (d) coins of one kind
10. 10.True or false: a magnet is needed for the ruler lever. (a) True (b) False
11. 11.True or false: a 30 cm ruler is not needed for the ruler lever. (a) False (b) True
12. 12.⚙️ Which simple machine is a spoon lifting a lid? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
13. 13.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit closer to middle (b) sit on the middle (c) jump up and down (d) sit farther from middle
14. 14.True or false: coins of one kind is needed for the ruler lever. (a) False (b) True
15. 15.🧺 Do we need a flat table for the ruler lever? (a) needed (b) not needed
16. 16.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) coins of one kind (c) a flat table (d) turmeric powder
17. 17.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) harder (b) the same (c) easier (d) impossible
18. 18.True or false: a magnet is not needed for the ruler lever. (a) True (b) False
19. 19.⚙️ Which simple machine is a well pulley? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
20. 20.True or false: a doorknob uses a pulley. (a) False (b) True
21. 21.🧺 Do we need turmeric powder for the ruler lever? (a) not needed (b) needed
22. 22.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) which side goes down (b) distance from the pencil (c) the kind of coins
23. 23.⚙️ Which of these is an inclined plane? (a) a doorknob (b) a slide (c) a bottle opener (d) a well pulley
24. 24.True or false: a 30 cm ruler is needed for the ruler lever. (a) True (b) False
25. 25.🧺 Do we need a 30 cm ruler for the ruler lever? (a) not needed (b) needed
26. 26.⚙️ Which of these is a lever? (a) a ramp (b) a steering wheel (c) a see-saw (d) a crane
27. 27.⚙️ Which simple machine is a steering wheel? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
28. 28.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? What do we do with “where the pencil is”? (a) we change it (b) we keep it the same (c) we measure it
29. 29.True or false: a battery cell is needed for the ruler lever. (a) True (b) False
30. 30.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) a battery cell (c) yeast (d) a flat table
31. 31.True or false: a round pencil is needed for the ruler lever. (a) True (b) False
32. 32.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? What do we do with “distance from the pencil”? (a) we keep it the same (b) we change it (c) we measure it
33. 33.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) which side goes down (b) distance from the pencil (c) the same ruler
34. 34.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a round pencil (c) yeast (d) coins of one kind
35. 35.True or false: a balloon is not needed for the ruler lever. (a) False (b) True
36. 36.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? What do we do with “the same ruler”? (a) we change it (b) we measure it (c) we keep it the same
37. 37.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: which side goes down is the one thing we change. (a) False (b) True
38. 38.True or false: a ramp uses a pulley. (a) False (b) True
39. 39.🧺 Do we need a round pencil for the ruler lever? (a) not needed (b) needed
40. 40.⚙️ Which simple machine is a doorknob? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle

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