Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 148 · 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.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a flat table (c) a 30 cm ruler (d) yeast
2. 2.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit on the middle (b) sit farther from middle (c) sit closer to middle (d) jump up and down
3. 3.🧺 Do we need yeast for the ruler lever? (a) not needed (b) needed
4. 4.🛟 What is a safe way to use a ruler as a lever? (a) press it gently (b) bend it till it snaps (c) flick coins at faces (d) stand on the ruler
5. 5.🧺 Do we need coins of one kind for the ruler lever? (a) not needed (b) needed
6. 6.🔮 Predict: 2 coins sit 5 cm left of the pencil and 2 coins sit 10 cm right of it. Which side goes down? (a) both go up (b) the left side (c) the right side (d) neither, it balances
7. 7.🧺 Do we need turmeric powder for the ruler lever? (a) needed (b) not needed
8. 8.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the same ruler is kept the same. (a) False (b) True
9. 9.⚖️ What is the turning point of a lever called? (a) the effort (b) the load (c) the axle (d) the fulcrum
10. 10.True or false: a 30 cm ruler is not needed for the ruler lever. (a) True (b) False
11. 11.True or false: a see-saw is an inclined plane. (a) False (b) True
12. 12.⚙️ Which of these is an inclined plane? (a) a see-saw (b) a steering wheel (c) a ramp (d) a tap handle
13. 13.True or false: a round pencil is needed for the ruler lever. (a) False (b) True
14. 14.⚖️ 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
15. 15.🧺 Which of these is needed for the ruler lever? (a) a flat table (b) turmeric powder (c) a battery cell (d) a balloon
16. 16.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? What do we do with “where the pencil is”? (a) we keep it the same (b) we change it (c) we measure it
17. 17.⚖️ 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 keep it the same (b) we change it (c) we measure it
18. 18.⚖️ 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) where the pencil is (d) the same ruler
19. 19.⚙️ Which of these is a wheel and axle? (a) a crane (b) a doorknob (c) a see-saw (d) a crowbar
20. 20.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) impossible (b) harder (c) the same (d) easier
21. 21.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) coins of one kind (c) turmeric powder (d) a 30 cm ruler
22. 22.🧺 Do we need a magnet for the ruler lever? (a) not needed (b) needed
23. 23.🧺 Do we need a battery cell for the ruler lever? (a) needed (b) not needed
24. 24.⚙️ Which simple machine is a doorknob? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
25. 25.⚙️ Which simple machine is a bottle opener? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
26. 26.True or false: a battery cell is needed for the ruler lever. (a) True (b) False
27. 27.⚖️ 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 keep it the same (b) we measure it (c) we change it
28. 28.⚖️ 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 change it (c) we measure it
29. 29.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a magnet (c) a flat table (d) a 30 cm ruler
30. 30.🛟 Why should coins be kept away from very small children? (a) they are too cold (b) they may swallow them (c) they are magnetic (d) they are too shiny
31. 31.True or false: a battery cell is not needed for the ruler lever. (a) False (b) True
32. 32.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the lid gets softer (b) the spoon is magnetic (c) a lever boosts your push (d) the spoon is hot
33. 33.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: which side goes down is the one thing we change. (a) False (b) True
34. 34.⚖️ 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 kind of coins (b) distance from the pencil (c) which side goes down
35. 35.⚙️ Which of these is a lever? (a) a crane (b) a steering wheel (c) a spoon lifting a lid (d) a sloping road
36. 36.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a round pencil (c) a balloon (d) a 30 cm ruler
37. 37.True or false: a spoon lifting a lid uses a pulley. (a) False (b) True
38. 38.⚖️ 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
39. 39.⚙️ Which simple machine is a slide? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
40. 40.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a battery cell (c) coins of one kind (d) a round pencil

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