Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 219 · 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.⚖️ 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) where the pencil is (c) the kind of coins (d) the same ruler
2. 2.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a 30 cm ruler (c) a round pencil (d) a mirror
3. 3.⚙️ Which simple machine is a tap handle? (a) a wheel and axle (b) an inclined plane (c) a pulley (d) a lever
4. 4.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) a mirror (c) coins of one kind (d) a battery cell
5. 5.🧺 Do we need yeast for the ruler lever? (a) not needed (b) needed
6. 6.⚖️ 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
7. 7.True or false: a bottle opener uses a pulley. (a) False (b) True
8. 8.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? What do we do with “the same ruler”? (a) we measure it (b) we change it (c) we keep it the same
9. 9.⚙️ Which of these is a lever? (a) a steering wheel (b) a doorknob (c) a flagpole (d) a crowbar
10. 10.⚙️ Which simple machine is a sloping road? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
11. 11.True or false: a spoon lifting a lid is a wheel and axle. (a) False (b) True
12. 12.⚙️ Which simple machine is a see-saw? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
13. 13.True or false: a battery cell is needed for the ruler lever. (a) True (b) False
14. 14.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) a magnet (c) a 30 cm ruler (d) yeast
15. 15.True or false: a crowbar is a lever. (a) False (b) True
16. 16.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) the number of coins (b) distance from the pencil (c) which side goes down
17. 17.🛟 Why should coins be kept away from very small children? (a) they are too shiny (b) they are too cold (c) they are magnetic (d) they may swallow them
18. 18.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) a round pencil (c) a magnet (d) yeast
19. 19.⚖️ What is the turning point of a lever called? (a) the load (b) the axle (c) the fulcrum (d) the effort
20. 20.⚙️ Which simple machine is a doorknob? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
21. 21.⚖️ 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) where the pencil is (c) distance from the pencil
22. 22.🧺 Which of these is not needed for the ruler lever? (a) a mirror (b) coins of one kind (c) a flat table (d) a round pencil
23. 23.⚙️ Which simple machine is a slide? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
24. 24.🧺 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 battery cell
25. 25.🧺 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 magnet (d) a round pencil
26. 26.🔮 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
27. 27.⚙️ Which of these is an inclined plane? (a) a crowbar (b) a crane (c) a tap handle (d) a ramp
28. 28.⚙️ Which simple machine is a flagpole? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
29. 29.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a flat table (c) a battery cell (d) a 30 cm ruler
30. 30.🧺 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 balloon
31. 31.⚖️ 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
32. 32.True or false: yeast is needed for the ruler lever. (a) False (b) True
33. 33.🧺 Do we need a balloon for the ruler lever? (a) needed (b) not needed
34. 34.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 2 cm to the left of the pencil. How many coins must you place 6 cm to the right to balance it?
35. 35.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is what we measure? (a) where the pencil is (b) the number of coins (c) which side goes down (d) the kind of coins
36. 36.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) turmeric powder (c) a flat table (d) a battery cell
37. 37.True or false: a magnet is not needed for the ruler lever. (a) True (b) False
38. 38.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) the same (b) impossible (c) harder (d) easier
39. 39.⚖️ 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
40. 40.🧺 Do we need a round pencil for the ruler lever? (a) not needed (b) needed

Free science experiments lessons, practice and worksheets at talentjr.in/science-experiments-for-kids