Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 25 · 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 needed for the ruler lever? (a) turmeric powder (b) a balloon (c) a magnet (d) a flat table
2. 2.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit closer to middle (b) sit farther from middle (c) sit on the middle (d) jump up and down
3. 3.True or false: a round pencil is not needed for the ruler lever. (a) True (b) False
4. 4.⚙️ Which simple machine is a see-saw? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
5. 5.⚙️ Which of these is a lever? (a) a tap handle (b) a doorknob (c) a ramp (d) a see-saw
6. 6.🛟 What is a safe way to use a ruler as a lever? (a) press it gently (b) flick coins at faces (c) bend it till it snaps (d) stand on the ruler
7. 7.True or false: a spoon lifting a lid is a lever. (a) True (b) False
8. 8.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: distance from the pencil is what we measure. (a) True (b) False
9. 9.True or false: a flat table is needed for the ruler lever. (a) True (b) False
10. 10.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the kind of coins is kept the same. (a) False (b) True
11. 11.🛟 Why should coins be kept away from very small children? (a) they may swallow them (b) they are magnetic (c) they are too cold (d) they are too shiny
12. 12.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) easier (b) harder (c) the same (d) impossible
13. 13.🔮 Predict: 2 coins sit 5 cm left of the pencil and 2 coins sit 10 cm right of it. Which side goes down? (a) the right side (b) the left side (c) neither, it balances (d) both go up
14. 14.🧺 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
15. 15.True or false: a see-saw is a lever. (a) True (b) False
16. 16.🧺 Do we need a balloon for the ruler lever? (a) not needed (b) needed
17. 17.True or false: a ramp is a lever. (a) False (b) True
18. 18.⚙️ Which of these uses a pulley? (a) a tap handle (b) a crane (c) a doorknob (d) a ramp
19. 19.⚙️ Which of these uses a pulley? (a) a flagpole (b) a slide (c) a spoon lifting a lid (d) a sloping road
20. 20.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a 30 cm ruler (c) a mirror (d) a round pencil
21. 21.🧺 Do we need a 30 cm ruler for the ruler lever? (a) needed (b) not needed
22. 22.⚖️ 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) which side goes down (c) where the pencil is (d) the number of coins
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 measure it (c) we keep it the same
24. 24.True or false: yeast is not needed for the ruler lever. (a) False (b) True
25. 25.True or false: a mirror is needed for the ruler lever. (a) False (b) True
26. 26.True or false: a ramp is an inclined plane. (a) False (b) True
27. 27.⚖️ 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) where the pencil is (c) distance from the pencil
28. 28.🧺 Do we need yeast for the ruler lever? (a) not needed (b) needed
29. 29.⚙️ Which of these is an inclined plane? (a) a crane (b) a bottle opener (c) a well pulley (d) a slide
30. 30.🧺 Which of these is needed for the ruler lever? (a) coins of one kind (b) a magnet (c) yeast (d) turmeric powder
31. 31.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) turmeric powder (b) a flat table (c) coins of one kind (d) a round pencil
32. 32.⚖️ 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 kind of coins (b) distance from the pencil (c) the number of coins (d) where the pencil is
33. 33.⚖️ 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
34. 34.🧺 Do we need a mirror for the ruler lever? (a) not needed (b) needed
35. 35.⚖️ 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 keep it the same (b) we measure it (c) we change it
36. 36.🧺 Do we need a flat table for the ruler lever? (a) needed (b) not needed
37. 37.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) turmeric powder (c) a battery cell (d) a round pencil
38. 38.🧺 Which of these is not needed for the ruler lever? (a) a balloon (b) a 30 cm ruler (c) a round pencil (d) a flat table
39. 39.⚙️ Which simple machine is a spoon lifting a lid? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
40. 40.True or false: a battery cell is not needed for the ruler lever. (a) False (b) True

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