Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 240 · 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.⚖️ 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 measure it (b) we keep it the same (c) we change it
2. 2.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a 30 cm ruler (c) turmeric powder (d) a flat table
3. 3.⚖️ Coins on the two sides balance when coins × distance is ___. (a) always 10 (b) equal on both sides (c) zero (d) bigger on the left
4. 4.True or false: a balloon is not needed for the ruler lever. (a) True (b) False
5. 5.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the spoon is magnetic (b) the spoon is hot (c) a lever boosts your push (d) the lid gets softer
6. 6.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 3 cm to the left of the pencil. How many coins must you place 5 cm to the right to balance it?
7. 7.🧺 Do we need a round pencil for the ruler lever? (a) not needed (b) needed
8. 8.⚙️ Which of these is a wheel and axle? (a) a ramp (b) a steering wheel (c) a flagpole (d) a crane
9. 9.⚖️ 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) where the pencil is (b) distance from the pencil (c) the kind of coins (d) the same ruler
10. 10.⚖️ 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 number of coins (b) which side goes down (c) distance from the pencil
11. 11.True or false: a magnet is needed for the ruler lever. (a) True (b) False
12. 12.🔮 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
13. 13.⚙️ Which simple machine is a doorknob? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
14. 14.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is what we measure? (a) which side goes down (b) distance from the pencil (c) the number of coins (d) where the pencil is
15. 15.True or false: a see-saw is a wheel and axle. (a) True (b) False
16. 16.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) distance from the pencil (b) which side goes down (c) the kind of coins
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) True (b) False
18. 18.🛟 What is a safe way to use a ruler as a lever? (a) flick coins at faces (b) stand on the ruler (c) bend it till it snaps (d) press it gently
19. 19.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) coins of one kind (c) yeast (d) a flat table
20. 20.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: distance from the pencil is the one thing we change. (a) False (b) True
21. 21.True or false: turmeric powder is needed for the ruler lever. (a) True (b) False
22. 22.⚖️ 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 keep it the same (c) we change it
23. 23.True or false: yeast is needed for the ruler lever. (a) True (b) False
24. 24.⚙️ Which of these is a lever? (a) a doorknob (b) a flagpole (c) a bottle opener (d) a tap handle
25. 25.⚙️ Which of these is an inclined plane? (a) a flagpole (b) a crowbar (c) a tap handle (d) a sloping road
26. 26.🧺 Which of these is needed for the ruler lever? (a) a 30 cm ruler (b) a battery cell (c) a balloon (d) a mirror
27. 27.⚙️ Which simple machine is a flagpole? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
28. 28.⚙️ Which simple machine is a spoon lifting a lid? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
29. 29.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) coins of one kind (c) a mirror (d) a flat table
30. 30.⚙️ Which simple machine is a tap handle? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
31. 31.⚖️ 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) True (b) False
32. 32.True or false: a round pencil is not needed for the ruler lever. (a) True (b) False
33. 33.⚙️ Which of these uses a pulley? (a) a steering wheel (b) a crane (c) a see-saw (d) a bottle opener
34. 34.🧺 Do we need a 30 cm ruler for the ruler lever? (a) not needed (b) needed
35. 35.🧺 Do we need a magnet for the ruler lever? (a) needed (b) not needed
36. 36.🧺 Which of these is not needed for the ruler lever? (a) a battery cell (b) a flat table (c) a round pencil (d) coins of one kind
37. 37.🧺 Do we need a balloon for the ruler lever? (a) not needed (b) needed
38. 38.🛟 Why should coins be kept away from very small children? (a) they are too shiny (b) they may swallow them (c) they are too cold (d) they are magnetic
39. 39.True or false: a 30 cm ruler is needed for the ruler lever. (a) False (b) True
40. 40.⚙️ Which simple machine is a slide? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane

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