Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 245 · 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.⚖️ 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) the lid gets softer (d) a lever boosts your push
2. 2.True or false: a steering wheel is a lever. (a) True (b) False
3. 3.True or false: a round pencil is not needed for the ruler lever. (a) False (b) True
4. 4.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: where the pencil is is what we measure. (a) False (b) True
5. 5.⚖️ 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
6. 6.True or false: a balloon is not needed for the ruler lever. (a) True (b) False
7. 7.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) a flat table (c) a magnet (d) a balloon
8. 8.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 4 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?
9. 9.⚖️ Coins on the two sides balance when coins × distance is ___. (a) always 10 (b) zero (c) equal on both sides (d) bigger on the left
10. 10.⚙️ Which of these is a wheel and axle? (a) a spoon lifting a lid (b) a ramp (c) a see-saw (d) a tap handle
11. 11.🧺 Do we need a round pencil for the ruler lever? (a) not needed (b) needed
12. 12.True or false: a steering wheel is a wheel and axle. (a) True (b) False
13. 13.True or false: a magnet is needed for the ruler lever. (a) True (b) False
14. 14.🔮 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
15. 15.🛟 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
16. 16.⚖️ 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 measure it (b) we change it (c) we keep it the same
17. 17.⚖️ 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) the same ruler (c) where the pencil is (d) distance from the pencil
18. 18.True or false: a mirror is not needed for the ruler lever. (a) True (b) False
19. 19.🧺 Which of these is needed for the ruler lever? (a) a round pencil (b) a magnet (c) turmeric powder (d) yeast
20. 20.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 6 cm to the left of the pencil. How many coins must you place 8 cm to the right to balance it?
21. 21.🧺 Which of these is not needed for the ruler lever? (a) a balloon (b) coins of one kind (c) a round pencil (d) a 30 cm ruler
22. 22.True or false: a 30 cm ruler is needed for the ruler lever. (a) False (b) True
23. 23.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a round pencil (c) a 30 cm ruler (d) turmeric powder
24. 24.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 2 cm to the left of the pencil. How many coins must you place 8 cm to the right to balance it?
25. 25.⚙️ Which of these is an inclined plane? (a) a tap handle (b) a ramp (c) a well pulley (d) a bottle opener
26. 26.🧺 Do we need a battery cell for the ruler lever? (a) not needed (b) needed
27. 27.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a flat table (c) yeast (d) coins of one kind
28. 28.True or false: a tap handle is a wheel and axle. (a) False (b) True
29. 29.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: distance from the pencil is what we measure. (a) True (b) False
30. 30.🧺 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) coins of one kind
31. 31.🧺 Do we need coins of one kind for the ruler lever? (a) not needed (b) needed
32. 32.⚖️ 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) True (b) False
33. 33.⚖️ 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) the kind of coins (c) the number of coins (d) the same ruler
34. 34.🧺 Do we need a 30 cm ruler for the ruler lever? (a) needed (b) not needed
35. 35.🧺 Do we need a magnet for the ruler lever? (a) not needed (b) needed
36. 36.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 10 cm to the left of the pencil. How many coins must you place 8 cm to the right to balance it?
37. 37.⚖️ 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
38. 38.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a 30 cm ruler (c) a battery cell (d) a round pencil
39. 39.⚙️ Which simple machine is a crane? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
40. 40.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: distance from the pencil is kept the same. (a) False (b) True

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