Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 353 · 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.True or false: turmeric powder is not needed for the ruler lever. (a) False (b) True
2. 2.⚖️ 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) where the pencil is
3. 3.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) a magnet (c) a 30 cm ruler (d) yeast
4. 4.⚙️ Which simple machine is a doorknob? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
5. 5.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) a battery cell (c) yeast (d) a round pencil
6. 6.🧺 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) turmeric powder
7. 7.⚙️ Which simple machine is a see-saw? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
8. 8.⚖️ 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
9. 9.True or false: a well pulley is a lever. (a) True (b) False
10. 10.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a 30 cm ruler (c) a round pencil (d) yeast
11. 11.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a flat table (c) coins of one kind (d) a battery cell
12. 12.⚙️ Which simple machine is a ramp? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
13. 13.🧺 Do we need yeast for the ruler lever? (a) needed (b) not needed
14. 14.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the kind of coins is kept the same. (a) False (b) True
15. 15.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) coins of one kind (c) a balloon (d) a mirror
16. 16.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a balloon (c) coins of one kind (d) a round pencil
17. 17.⚖️ 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) False (b) True
18. 18.True or false: a bottle opener is a lever. (a) True (b) False
19. 19.True or false: a battery cell is needed for the ruler lever. (a) True (b) False
20. 20.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 1 cm to the left of the pencil. How many coins must you place 1 cm to the right to balance it?
21. 21.True or false: a see-saw is a wheel and axle. (a) False (b) True
22. 22.⚖️ 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
23. 23.⚙️ Which of these is an inclined plane? (a) a crowbar (b) a tap handle (c) a well pulley (d) a slide
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) the left side (b) neither, it balances (c) the right side (d) both go up
25. 25.⚙️ Which simple machine is a bottle opener? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
26. 26.⚖️ 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
27. 27.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) coins of one kind (c) a balloon (d) a flat table
28. 28.True or false: a 30 cm ruler is needed for the ruler lever. (a) True (b) False
29. 29.⚖️ 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 number of coins (b) distance from the pencil (c) where the pencil is (d) which side goes down
30. 30.⚖️ 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) False (b) True
31. 31.🧺 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 mirror
32. 32.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a flat table (c) a 30 cm ruler (d) a mirror
33. 33.True or false: a flat table is not needed for the ruler lever. (a) False (b) True
34. 34.🛟 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
35. 35.🧺 Do we need a flat table for the ruler lever? (a) needed (b) not needed
36. 36.🛟 What is a safe way to use a ruler as a lever? (a) press it gently (b) stand on the ruler (c) flick coins at faces (d) bend it till it snaps
37. 37.⚙️ Which of these is a lever? (a) a flagpole (b) a spoon lifting a lid (c) a doorknob (d) a tap handle
38. 38.⚙️ Which of these uses a pulley? (a) a steering wheel (b) a sloping road (c) a tap handle (d) a flagpole
39. 39.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the same ruler is what we measure. (a) True (b) False
40. 40.True or false: a bottle opener is a wheel and axle. (a) True (b) False

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