Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 899 · 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.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) impossible (b) easier (c) the same (d) harder
2. 2.⚖️ What is the turning point of a lever called? (a) the axle (b) the effort (c) the load (d) the fulcrum
3. 3.⚖️ 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
4. 4.True or false: coins of one kind is not needed for the ruler lever. (a) False (b) True
5. 5.🧺 Which of these is not needed for the ruler lever? (a) a magnet (b) a flat table (c) a 30 cm ruler (d) coins of one kind
6. 6.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the number of coins is the one thing we change. (a) True (b) False
7. 7.⚙️ Which simple machine is a crowbar? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
8. 8.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a flat table (c) a 30 cm ruler (d) a mirror
9. 9.🔮 Predict: 2 coins sit 5 cm left of the pencil and 2 coins sit 10 cm right of it. Which side goes down? (a) both go up (b) neither, it balances (c) the left side (d) the right side
10. 10.⚖️ 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) distance from the pencil (b) where the pencil is (c) the number of coins (d) the same ruler
11. 11.🛟 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
12. 12.True or false: a flagpole is a lever. (a) True (b) False
13. 13.🛟 Why should coins be kept away from very small children? (a) they are too shiny (b) they are magnetic (c) they are too cold (d) they may swallow them
14. 14.🧺 Do we need a round pencil for the ruler lever? (a) not needed (b) needed
15. 15.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) a 30 cm ruler (c) yeast (d) turmeric powder
16. 16.True or false: a 30 cm ruler is needed for the ruler lever. (a) True (b) False
17. 17.⚖️ 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 keep it the same (b) we measure it (c) we change it
18. 18.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the lid gets softer (b) the spoon is magnetic (c) the spoon is hot (d) a lever boosts your push
19. 19.🧺 Which of these is needed for the ruler lever? (a) yeast (b) a round pencil (c) a magnet (d) a balloon
20. 20.⚖️ 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 measure it (b) we keep it the same (c) we change it
21. 21.True or false: a doorknob is a lever. (a) True (b) False
22. 22.⚖️ 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) False (b) True
23. 23.⚙️ Which of these is an inclined plane? (a) a bottle opener (b) a flagpole (c) a ramp (d) a spoon lifting a lid
24. 24.🧺 Do we need a battery cell for the ruler lever? (a) needed (b) not needed
25. 25.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: which side goes down is what we measure. (a) False (b) True
26. 26.⚖️ 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
27. 27.⚙️ Which simple machine is a ramp? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
28. 28.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) the same ruler (b) distance from the pencil (c) which side goes down
29. 29.True or false: coins of one kind is needed for the ruler lever. (a) False (b) True
30. 30.⚙️ Which simple machine is a steering wheel? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
31. 31.⚙️ Which simple machine is a crane? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
32. 32.⚖️ 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) True (b) False
33. 33.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a 30 cm ruler (c) turmeric powder (d) a flat table
34. 34.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is what we measure? (a) where the pencil is (b) the number of coins (c) which side goes down (d) the same ruler
35. 35.True or false: a crowbar is a wheel and axle. (a) True (b) False
36. 36.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) a battery cell (c) coins of one kind (d) turmeric powder
37. 37.True or false: yeast is needed for the ruler lever. (a) False (b) True
38. 38.⚖️ 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
39. 39.⚙️ Which of these is a wheel and axle? (a) a crane (b) a doorknob (c) a spoon lifting a lid (d) a see-saw
40. 40.True or false: a battery cell is needed for the ruler lever. (a) False (b) True

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