Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 23 · 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 not needed for the ruler lever? (a) a round pencil (b) a 30 cm ruler (c) yeast (d) a flat table
2. 2.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit on the middle (b) sit farther from middle (c) jump up and down (d) sit closer to middle
3. 3.True or false: yeast is not needed for the ruler lever. (a) True (b) False
4. 4.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? What do we do with “the kind of coins”? (a) we change it (b) we measure it (c) we keep it the same
5. 5.True or false: a ramp is a wheel and axle. (a) False (b) True
6. 6.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a magnet (b) a 30 cm ruler (c) a round pencil (d) coins of one kind
7. 7.⚖️ 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) the number of coins (c) the same ruler (d) where the pencil is
8. 8.🔮 Predict: 2 coins sit 5 cm left of the pencil and 2 coins sit 10 cm right of it. Which side goes down? (a) neither, it balances (b) both go up (c) the left side (d) the right side
9. 9.True or false: a see-saw is a wheel and axle. (a) False (b) True
10. 10.True or false: a mirror is needed for the ruler lever. (a) True (b) False
11. 11.⚙️ Which simple machine is a steering wheel? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
12. 12.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) a flat table (c) a balloon (d) a battery cell
13. 13.⚖️ 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) True (b) False
14. 14.⚙️ Which simple machine is a spoon lifting a lid? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
15. 15.🧺 Do we need a mirror for the ruler lever? (a) needed (b) not needed
16. 16.⚙️ Which of these is a lever? (a) a flagpole (b) a bottle opener (c) a tap handle (d) a crane
17. 17.True or false: a spoon lifting a lid uses a pulley. (a) False (b) True
18. 18.⚙️ Which simple machine is a sloping road? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
19. 19.⚖️ 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 measure it (b) we keep it the same (c) we change it
20. 20.🧺 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 flat table (d) a battery cell
21. 21.True or false: a balloon is needed for the ruler lever. (a) False (b) True
22. 22.🧺 Do we need yeast for the ruler lever? (a) needed (b) not needed
23. 23.🛟 Why should coins be kept away from very small children? (a) they are magnetic (b) they are too cold (c) they may swallow them (d) they are too shiny
24. 24.⚙️ Which of these is an inclined plane? (a) a ramp (b) a steering wheel (c) a well pulley (d) a crowbar
25. 25.⚙️ Which of these is a lever? (a) a crowbar (b) a tap handle (c) a crane (d) a flagpole
26. 26.⚙️ Which simple machine is a crowbar? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
27. 27.True or false: a battery cell is not needed for the ruler lever. (a) False (b) True
28. 28.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: which side goes down is the one thing we change. (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) a round pencil (c) a 30 cm ruler (d) a mirror
30. 30.🧺 Which of these is needed for the ruler lever? (a) yeast (b) turmeric powder (c) a battery cell (d) coins of one kind
31. 31.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a round pencil (c) a flat table (d) a magnet
32. 32.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 2 cm to the left of the pencil. How many coins must you place 1 cm to the right to balance it?
33. 33.🧺 Do we need coins of one kind for the ruler lever? (a) not needed (b) needed
34. 34.⚖️ 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) distance from the pencil (c) the kind of coins
35. 35.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) turmeric powder (c) a flat table (d) a 30 cm ruler
36. 36.True or false: a 30 cm ruler is not needed for the ruler lever. (a) True (b) False
37. 37.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: which side goes down is kept the same. (a) False (b) True
38. 38.⚙️ Which simple machine is a bottle opener? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
39. 39.⚖️ 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 change it (b) we measure it (c) we keep it the same
40. 40.True or false: a doorknob is a wheel and axle. (a) False (b) True

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