Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 989 · 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) a mirror (b) a balloon (c) coins of one kind (d) turmeric powder
2. 2.🧺 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 round pencil (d) a magnet
3. 3.⚖️ Coins on the two sides balance when coins × distance is ___. (a) equal on both sides (b) bigger on the left (c) zero (d) always 10
4. 4.True or false: a see-saw is a lever. (a) True (b) False
5. 5.🛟 Why should coins be kept away from very small children? (a) they are magnetic (b) they are too cold (c) they are too shiny (d) they may swallow them
6. 6.🧺 Which of these is needed for the ruler lever? (a) a battery cell (b) a round pencil (c) a mirror (d) turmeric powder
7. 7.⚙️ Which of these is a wheel and axle? (a) a crane (b) a tap handle (c) a bottle opener (d) a crowbar
8. 8.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) harder (b) the same (c) easier (d) impossible
9. 9.True or false: a round pencil is not needed for the ruler lever. (a) False (b) True
10. 10.True or false: yeast is not needed for the ruler lever. (a) True (b) False
11. 11.⚖️ 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 change it (c) we keep it the same
12. 12.🛟 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
13. 13.⚖️ 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
14. 14.True or false: a ramp is an inclined plane. (a) True (b) False
15. 15.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 6 cm to the left of the pencil. How many coins must you place 3 cm to the right to balance it?
16. 16.🧺 Do we need coins of one kind for the ruler lever? (a) needed (b) not needed
17. 17.True or false: a battery cell is needed for the ruler lever. (a) True (b) False
18. 18.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a mirror (b) coins of one kind (c) a round pencil (d) a flat table
19. 19.⚖️ 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 kind of coins (c) the number of coins (d) which side goes down
20. 20.🧺 Do we need yeast for the ruler lever? (a) not needed (b) needed
21. 21.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a round pencil (c) a battery cell (d) a 30 cm ruler
22. 22.🧺 Which of these is needed for the ruler lever? (a) a flat table (b) yeast (c) a balloon (d) a magnet
23. 23.True or false: coins of one kind is needed for the ruler lever. (a) True (b) False
24. 24.⚖️ What is the turning point of a lever called? (a) the fulcrum (b) the axle (c) the load (d) the effort
25. 25.⚖️ 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 same ruler (d) the number of coins
26. 26.True or false: turmeric powder is not needed for the ruler lever. (a) True (b) False
27. 27.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 3 cm to the left of the pencil. How many coins must you place 6 cm to the right to balance it?
28. 28.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the lid gets softer (b) the spoon is hot (c) a lever boosts your push (d) the spoon is magnetic
29. 29.True or false: a steering wheel is a wheel and axle. (a) True (b) False
30. 30.⚖️ 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) False (b) True
31. 31.True or false: a round pencil is needed for the ruler lever. (a) True (b) False
32. 32.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? What do we do with “the number of coins”? (a) we measure it (b) we change it (c) we keep it the same
33. 33.🧺 Do we need a mirror for the ruler lever? (a) not needed (b) needed
34. 34.⚖️ 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
35. 35.🧺 Which of these is needed for the ruler lever? (a) yeast (b) turmeric powder (c) a 30 cm ruler (d) a balloon
36. 36.🧺 Do we need a round pencil for the ruler lever? (a) not needed (b) needed
37. 37.True or false: a steering wheel is a lever. (a) True (b) False
38. 38.True or false: a mirror is needed for the ruler lever. (a) True (b) False
39. 39.⚖️ 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 change it (c) we measure it
40. 40.🔮 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) neither, it balances (c) both go up (d) the right side

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