Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 550 · 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.⚖️ 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 measure it (c) we change it
2. 2.True or false: a balloon is not needed for the ruler lever. (a) True (b) False
3. 3.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is the one thing we change? (a) the number of coins (b) the same ruler (c) distance from the pencil (d) where the pencil is
4. 4.🧺 Which of these is needed for the ruler lever? (a) yeast (b) a mirror (c) a magnet (d) a flat table
5. 5.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: distance from the pencil is the one thing we change. (a) True (b) False
6. 6.True or false: yeast is not needed for the ruler lever. (a) False (b) True
7. 7.🔮 Predict: 2 coins sit 5 cm left of the pencil and 2 coins sit 10 cm right of it. Which side goes down? (a) neither, it balances (b) both go up (c) the right side (d) the left side
8. 8.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a 30 cm ruler (c) a battery cell (d) a flat table
9. 9.True or false: coins of one kind is not needed for the ruler lever. (a) True (b) False
10. 10.True or false: a 30 cm ruler is needed for the ruler lever. (a) True (b) False
11. 11.⚖️ What is the turning point of a lever called? (a) the load (b) the effort (c) the axle (d) the fulcrum
12. 12.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is what we measure? (a) which side goes down (b) the kind of coins (c) where the pencil is (d) distance from the pencil
13. 13.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the number of coins is kept the same. (a) False (b) True
14. 14.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the same ruler is kept the same. (a) True (b) False
15. 15.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 6 cm to the left of the pencil and 3 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
16. 16.True or false: a slide is an inclined plane. (a) False (b) True
17. 17.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: where the pencil is is kept the same. (a) False (b) True
18. 18.⚙️ Which simple machine is a sloping road? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
19. 19.⚙️ Which simple machine is a bottle opener? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
20. 20.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) yeast (c) a round pencil (d) a balloon
21. 21.True or false: a slide uses a pulley. (a) True (b) False
22. 22.🧺 Do we need a flat table for the ruler lever? (a) not needed (b) needed
23. 23.🛟 Why should coins be kept away from very small children? (a) they are magnetic (b) they are too cold (c) they may swallow them (d) they are too shiny
24. 24.⚙️ Which of these is an inclined plane? (a) a tap handle (b) a doorknob (c) a flagpole (d) a slide
25. 25.True or false: a round pencil is needed for the ruler lever. (a) False (b) True
26. 26.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) yeast (c) a flat table (d) a round pencil
27. 27.🧺 Do we need yeast for the ruler lever? (a) not needed (b) needed
28. 28.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a round pencil (c) coins of one kind (d) a magnet
29. 29.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) a mirror (c) a balloon (d) coins of one kind
30. 30.True or false: a crane uses a pulley. (a) False (b) True
31. 31.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: distance from the pencil is kept the same. (a) True (b) False
32. 32.⚙️ Which of these is a lever? (a) a flagpole (b) a tap handle (c) a ramp (d) a crowbar
33. 33.True or false: a 30 cm ruler is not needed for the ruler lever. (a) True (b) False
34. 34.True or false: a mirror is needed for the ruler lever. (a) True (b) False
35. 35.⚙️ Which simple machine is a ramp? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
36. 36.🧺 Do we need coins of one kind for the ruler lever? (a) not needed (b) needed
37. 37.⚙️ Which of these uses a pulley? (a) a tap handle (b) a well pulley (c) a steering wheel (d) a ramp
38. 38.⚙️ Which of these is a lever? (a) a doorknob (b) a slide (c) a see-saw (d) a tap handle
39. 39.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the number of coins is what we measure. (a) True (b) False
40. 40.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? What do we do with “which side goes down”? (a) we measure it (b) we change it (c) we keep it the same

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