Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 515 · 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 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
2. 2.🧺 Which of these is needed for the ruler lever? (a) a round pencil (b) turmeric powder (c) a mirror (d) a balloon
3. 3.⚖️ 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) which side goes down (c) where the pencil is (d) the same ruler
4. 4.🧺 Do we need yeast for the ruler lever? (a) not needed (b) needed
5. 5.⚙️ Which simple machine is a see-saw? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
6. 6.⚙️ Which simple machine is a spoon lifting a lid? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
7. 7.⚖️ 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) the same ruler (c) which side goes down (d) the kind of coins
8. 8.⚙️ Which simple machine is a bottle opener? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
9. 9.True or false: a tap handle is an inclined plane. (a) False (b) True
10. 10.True or false: a spoon lifting a lid is an inclined plane. (a) False (b) True
11. 11.⚖️ 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 keep it the same (c) we measure it
12. 12.⚙️ Which of these uses a pulley? (a) a slide (b) a doorknob (c) a well pulley (d) a bottle opener
13. 13.⚖️ 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) True (b) False
14. 14.True or false: yeast is needed for the ruler lever. (a) True (b) False
15. 15.🧺 Do we need turmeric powder for the ruler lever? (a) not needed (b) needed
16. 16.🧺 Do we need a battery cell for the ruler lever? (a) not needed (b) needed
17. 17.⚙️ Which of these is a wheel and axle? (a) a slide (b) a flagpole (c) a bottle opener (d) a steering wheel
18. 18.🔮 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 left side (c) the right side (d) both go up
19. 19.🧺 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 battery cell (d) a 30 cm ruler
20. 20.🧺 Which of these is not needed for the ruler lever? (a) a magnet (b) a 30 cm ruler (c) a flat table (d) a round pencil
21. 21.⚙️ Which of these is an inclined plane? (a) a slide (b) a tap handle (c) a see-saw (d) a flagpole
22. 22.⚙️ Which simple machine is a tap handle? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
23. 23.🛟 What is a safe way to use a ruler as a lever? (a) flick coins at faces (b) press it gently (c) bend it till it snaps (d) stand on the ruler
24. 24.True or false: turmeric powder is needed for the ruler lever. (a) True (b) False
25. 25.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) coins of one kind (c) a round pencil (d) turmeric powder
26. 26.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a 30 cm ruler (c) a flat table (d) a magnet
27. 27.🧺 Do we need a magnet for the ruler lever? (a) needed (b) not needed
28. 28.⚖️ 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
29. 29.⚖️ 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
30. 30.⚖️ What is the turning point of a lever called? (a) the effort (b) the fulcrum (c) the axle (d) the load
31. 31.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 3 cm to the left of the pencil. How many coins must you place 3 cm to the right to balance it?
32. 32.True or false: a see-saw is a wheel and axle. (a) False (b) True
33. 33.True or false: a bottle opener uses a pulley. (a) True (b) False
34. 34.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a mirror (c) coins of one kind (d) a flat table
35. 35.⚙️ Which simple machine is a doorknob? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
36. 36.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) a flat table (c) yeast (d) a battery cell
37. 37.🧺 Which of these is needed for the ruler lever? (a) yeast (b) a 30 cm ruler (c) a mirror (d) a balloon
38. 38.⚙️ Which of these is a wheel and axle? (a) a doorknob (b) a slide (c) a crane (d) a bottle opener
39. 39.True or false: a ramp is a wheel and axle. (a) True (b) False
40. 40.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) where the pencil is (b) distance from the pencil (c) which side goes down

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