Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 90 · 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 spoon lifting a lid (b) a doorknob (c) a crane (d) a tap handle
2. 2.⚖️ 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
3. 3.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is what we measure? (a) the number of coins (b) which side goes down (c) the kind of coins (d) where the pencil is
4. 4.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: where the pencil is is the one thing we change. (a) True (b) False
5. 5.🛟 Why should coins be kept away from very small children? (a) they are too cold (b) they are too shiny (c) they may swallow them (d) they are magnetic
6. 6.⚖️ 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) True (b) False
7. 7.⚙️ Which simple machine is a well pulley? (a) a wheel and axle (b) an inclined plane (c) a pulley (d) a lever
8. 8.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a flat table (c) turmeric powder (d) coins of one kind
9. 9.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a balloon (c) a flat table (d) a 30 cm ruler
10. 10.True or false: coins of one kind is not needed for the ruler lever. (a) True (b) False
11. 11.🛟 What is a safe way to use a ruler as a lever? (a) press it gently (b) bend it till it snaps (c) stand on the ruler (d) flick coins at faces
12. 12.⚖️ 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
13. 13.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the spoon is magnetic (b) a lever boosts your push (c) the lid gets softer (d) the spoon is hot
14. 14.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? What do we do with “the kind of coins”? (a) we keep it the same (b) we change it (c) we measure it
15. 15.⚙️ Which of these is an inclined plane? (a) a ramp (b) a steering wheel (c) a crowbar (d) a crane
16. 16.⚙️ Which of these is a lever? (a) a well pulley (b) a doorknob (c) a flagpole (d) a see-saw
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 of these is needed for the ruler lever? (a) a magnet (b) yeast (c) a balloon (d) a round pencil
19. 19.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) where the pencil is (b) distance from the pencil (c) which side goes down
20. 20.⚙️ Which of these uses a pulley? (a) a ramp (b) a slide (c) a crane (d) a crowbar
21. 21.🧺 Do we need a flat table for the ruler lever? (a) needed (b) not needed
22. 22.⚙️ Which of these uses a pulley? (a) a slide (b) a sloping road (c) a flagpole (d) a ramp
23. 23.⚖️ 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 change it (b) we keep it the same (c) we measure it
24. 24.⚖️ Coins on the two sides balance when coins × distance is ___. (a) bigger on the left (b) zero (c) always 10 (d) equal on both sides
25. 25.True or false: a flat table is needed for the ruler lever. (a) False (b) True
26. 26.🔮 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) the left side (c) both go up (d) the right side
27. 27.True or false: a see-saw is an inclined plane. (a) False (b) True
28. 28.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a battery cell (c) coins of one kind (d) a 30 cm ruler
29. 29.True or false: a battery cell is needed for the ruler lever. (a) True (b) False
30. 30.⚙️ Which of these is an inclined plane? (a) a see-saw (b) a sloping road (c) a crowbar (d) a flagpole
31. 31.🧺 Do we need yeast for the ruler lever? (a) needed (b) not needed
32. 32.True or false: a doorknob is a wheel and axle. (a) False (b) True
33. 33.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit closer to middle (b) jump up and down (c) sit farther from middle (d) sit on the middle
34. 34.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) a flat table (c) coins of one kind (d) yeast
35. 35.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) coins of one kind (c) a 30 cm ruler (d) a battery cell
36. 36.⚙️ Which simple machine is a doorknob? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
37. 37.🧺 Do we need a round pencil for the ruler lever? (a) not needed (b) needed
38. 38.True or false: a flagpole uses a pulley. (a) False (b) True
39. 39.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the kind of coins is the one thing we change. (a) False (b) True
40. 40.True or false: a see-saw is a lever. (a) True (b) False

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