Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 678 · 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.True or false: a battery cell is needed for the ruler lever. (a) False (b) True
2. 2.🧺 Do we need a battery cell for the ruler lever? (a) not needed (b) needed
3. 3.🧺 Which of these is needed for the ruler lever? (a) a battery cell (b) turmeric powder (c) coins of one kind (d) yeast
4. 4.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the kind of coins is what we measure. (a) True (b) False
5. 5.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a magnet (c) a flat table (d) a round pencil
6. 6.🧺 Do we need turmeric powder for the ruler lever? (a) not needed (b) needed
7. 7.⚖️ 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) True (b) False
8. 8.True or false: a crane is an inclined plane. (a) False (b) True
9. 9.🧺 Do we need a 30 cm ruler for the ruler lever? (a) not needed (b) needed
10. 10.🛟 What is a safe way to use a ruler as a lever? (a) press it gently (b) stand on the ruler (c) bend it till it snaps (d) flick coins at faces
11. 11.🔮 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 left side (b) the right side (c) neither, it balances (d) both go up
12. 12.🛟 Why should coins be kept away from very small children? (a) they are too cold (b) they are magnetic (c) they are too shiny (d) they may swallow them
13. 13.True or false: a see-saw is a lever. (a) True (b) False
14. 14.⚙️ Which simple machine is a see-saw? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
15. 15.🧺 Do we need a magnet for the ruler lever? (a) not needed (b) needed
16. 16.⚖️ What is the turning point of a lever called? (a) the effort (b) the axle (c) the fulcrum (d) the load
17. 17.⚖️ 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 measure it (b) we change it (c) we keep it the same
18. 18.🧺 Do we need a balloon for the ruler lever? (a) not needed (b) needed
19. 19.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) the same (b) harder (c) impossible (d) easier
20. 20.True or false: a battery cell is not needed for the ruler lever. (a) False (b) True
21. 21.⚖️ 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 keep it the same (c) we measure it
22. 22.🧺 Do we need yeast for the ruler lever? (a) not needed (b) needed
23. 23.True or false: a bottle opener is an inclined plane. (a) True (b) False
24. 24.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) a round pencil (c) turmeric powder (d) a battery cell
25. 25.True or false: a crane uses a pulley. (a) False (b) True
26. 26.True or false: a spoon lifting a lid is a wheel and axle. (a) True (b) False
27. 27.⚖️ 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) False (b) True
28. 28.True or false: a round pencil is not needed for the ruler lever. (a) True (b) False
29. 29.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) coins of one kind (c) a 30 cm ruler (d) yeast
30. 30.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a flat table (c) a 30 cm ruler (d) a balloon
31. 31.True or false: yeast is needed for the ruler lever. (a) False (b) True
32. 32.⚙️ Which simple machine is a bottle opener? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
33. 33.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 4 cm to the left of the pencil. How many coins must you place 5 cm to the right to balance it?
34. 34.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a 30 cm ruler (c) a battery cell (d) a flat table
35. 35.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit closer to middle (b) sit on the middle (c) sit farther from middle (d) jump up and down
36. 36.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a flat table (c) a balloon (d) a round pencil
37. 37.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a flat table (c) a round pencil (d) turmeric powder
38. 38.True or false: a balloon is needed for the ruler lever. (a) False (b) True
39. 39.🧺 Which of these is not needed for the ruler lever? (a) a mirror (b) a flat table (c) a round pencil (d) coins of one kind
40. 40.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a mirror (c) coins of one kind (d) a round pencil

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