Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 441 · 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: a flagpole is a lever. (a) False (b) True
2. 2.⚙️ Which simple machine is a flagpole? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
3. 3.⚖️ 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
4. 4.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: where the pencil is is kept the same. (a) False (b) True
5. 5.⚙️ Which of these uses a pulley? (a) a crowbar (b) a bottle opener (c) a flagpole (d) a see-saw
6. 6.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit closer to middle (b) sit farther from middle (c) jump up and down (d) sit on the middle
7. 7.🧺 Do we need a battery cell for the ruler lever? (a) not needed (b) needed
8. 8.⚖️ 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) which side goes down (b) where the pencil is (c) distance from the pencil (d) the kind of coins
9. 9.🧺 Do we need a 30 cm ruler for the ruler lever? (a) not needed (b) needed
10. 10.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) turmeric powder (c) a flat table (d) coins of one kind
11. 11.⚙️ Which of these is a lever? (a) a well pulley (b) a steering wheel (c) a see-saw (d) a sloping road
12. 12.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a mirror (b) a 30 cm ruler (c) coins of one kind (d) a round pencil
13. 13.⚖️ What is the turning point of a lever called? (a) the fulcrum (b) the load (c) the effort (d) the axle
14. 14.⚙️ Which of these is an inclined plane? (a) a slide (b) a see-saw (c) a doorknob (d) a spoon lifting a lid
15. 15.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 2 cm to the left of the pencil and 2 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
16. 16.🧺 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) yeast (d) a flat table
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 what we measure. (a) True (b) False
18. 18.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a magnet (c) a 30 cm ruler (d) a round pencil
19. 19.⚙️ Which simple machine is a tap handle? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
20. 20.True or false: coins of one kind is needed for the ruler lever. (a) False (b) True
21. 21.🧺 Which of these is needed for the ruler lever? (a) a 30 cm ruler (b) a mirror (c) turmeric powder (d) a battery cell
22. 22.True or false: a crowbar is a wheel and axle. (a) False (b) True
23. 23.True or false: a 30 cm ruler is needed for the ruler lever. (a) False (b) True
24. 24.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) easier (b) the same (c) impossible (d) harder
25. 25.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) a lever boosts your push (b) the spoon is hot (c) the lid gets softer (d) the spoon is magnetic
26. 26.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) coins of one kind (c) a magnet (d) yeast
27. 27.🔮 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 right side (b) the left side (c) neither, it balances (d) both go up
28. 28.True or false: a magnet is not needed for the ruler lever. (a) False (b) True
29. 29.⚖️ 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
30. 30.True or false: a bottle opener is a wheel and axle. (a) True (b) False
31. 31.True or false: a balloon is needed for the ruler lever. (a) False (b) True
32. 32.⚖️ Coins on the two sides balance when coins × distance is ___. (a) always 10 (b) bigger on the left (c) zero (d) equal on both sides
33. 33.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 5 cm to the left of the pencil. How many coins must you place 6 cm to the right to balance it?
34. 34.True or false: coins of one kind is not needed for the ruler lever. (a) True (b) False
35. 35.🧺 Which of these is needed for the ruler lever? (a) yeast (b) a balloon (c) a magnet (d) a flat table
36. 36.⚖️ 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 keep it the same (b) we change it (c) we measure it
37. 37.⚖️ 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
38. 38.True or false: a spoon lifting a lid is a lever. (a) False (b) True
39. 39.⚙️ Which of these is an inclined plane? (a) a ramp (b) a steering wheel (c) a tap handle (d) a spoon lifting a lid
40. 40.🧺 Which of these is not needed for the ruler lever? (a) a mirror (b) a 30 cm ruler (c) a round pencil (d) coins of one kind

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