Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 556 · 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) yeast (b) a battery cell (c) a round pencil (d) a magnet
2. 2.⚖️ 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 same ruler (b) the kind of coins (c) distance from the pencil (d) the number of coins
3. 3.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a magnet (c) a 30 cm ruler (d) coins of one kind
4. 4.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a mirror (c) a round pencil (d) a flat table
5. 5.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a battery cell (b) coins of one kind (c) a 30 cm ruler (d) a round pencil
6. 6.⚖️ 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 change it (b) we measure it (c) we keep it the same
7. 7.True or false: coins of one kind is not needed for the ruler lever. (a) False (b) True
8. 8.🧺 Do we need a magnet for the ruler lever? (a) not needed (b) needed
9. 9.True or false: a battery cell is not needed for the ruler lever. (a) False (b) True
10. 10.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 1 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?
11. 11.True or false: a round pencil is needed for the ruler lever. (a) True (b) False
12. 12.True or false: a ramp is an inclined plane. (a) True (b) False
13. 13.🛟 What is a safe way to use a ruler as a lever? (a) press it gently (b) bend it till it snaps (c) stand on the ruler (d) flick coins at faces
14. 14.⚙️ Which simple machine is a ramp? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
15. 15.True or false: yeast is not needed for the ruler lever. (a) True (b) False
16. 16.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) a round pencil (c) coins of one kind (d) a battery cell
17. 17.⚖️ 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) True (b) False
18. 18.True or false: a spoon lifting a lid is a lever. (a) False (b) True
19. 19.⚖️ 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
20. 20.True or false: coins of one kind is needed for the ruler lever. (a) True (b) False
21. 21.⚖️ 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
22. 22.⚖️ 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
23. 23.True or false: a mirror is needed for the ruler lever. (a) False (b) True
24. 24.🔮 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) the right side (c) the left side (d) both go up
25. 25.True or false: a doorknob is a wheel and axle. (a) True (b) False
26. 26.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) easier (b) impossible (c) harder (d) the same
27. 27.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the number of coins is what we measure. (a) True (b) False
28. 28.⚖️ 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
29. 29.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a flat table (c) a balloon (d) a 30 cm ruler
30. 30.⚙️ Which simple machine is a well pulley? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
31. 31.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is what we measure? (a) distance from the pencil (b) where the pencil is (c) which side goes down (d) the number of coins
32. 32.⚖️ What is the turning point of a lever called? (a) the effort (b) the axle (c) the load (d) the fulcrum
33. 33.True or false: a round pencil is not needed for the ruler lever. (a) True (b) False
34. 34.🛟 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
35. 35.⚙️ Which of these is a lever? (a) a slide (b) a doorknob (c) a see-saw (d) a sloping road
36. 36.True or false: a crane uses a pulley. (a) True (b) False
37. 37.⚙️ Which simple machine is a crane? (a) a wheel and axle (b) an inclined plane (c) a pulley (d) a lever
38. 38.⚖️ 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
39. 39.⚙️ Which simple machine is a slide? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
40. 40.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) a round pencil (c) coins of one kind (d) a magnet

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