Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 692 · 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 flat table (b) a round pencil (c) a balloon (d) a 30 cm ruler
2. 2.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: where the pencil is is the one thing we change. (a) True (b) False
3. 3.🧺 Do we need a balloon for the ruler lever? (a) needed (b) not needed
4. 4.True or false: yeast is not needed for the ruler lever. (a) False (b) True
5. 5.⚙️ Which simple machine is a flagpole? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
6. 6.⚖️ 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) the same ruler (d) the kind of coins
7. 7.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 4 cm to the left of the pencil. How many coins must you place 6 cm to the right to balance it?
8. 8.⚖️ 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
9. 9.True or false: a flat table is needed for the ruler lever. (a) True (b) False
10. 10.🛟 What is a safe way to use a ruler as a lever? (a) press it gently (b) bend it till it snaps (c) stand on the ruler (d) flick coins at faces
11. 11.True or false: a tap handle is a wheel and axle. (a) True (b) False
12. 12.⚙️ Which simple machine is a bottle opener? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
13. 13.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit closer to middle (b) jump up and down (c) sit on the middle (d) sit farther from middle
14. 14.🧺 Do we need turmeric powder for the ruler lever? (a) needed (b) not needed
15. 15.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a flat table (c) coins of one kind (d) a magnet
16. 16.🧺 Do we need coins of one kind for the ruler lever? (a) needed (b) not needed
17. 17.True or false: a sloping road uses a pulley. (a) True (b) False
18. 18.⚖️ 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
19. 19.⚖️ What is the turning point of a lever called? (a) the fulcrum (b) the load (c) the axle (d) the effort
20. 20.True or false: a tap handle is an inclined plane. (a) True (b) False
21. 21.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) a round pencil (c) coins of one kind (d) turmeric powder
22. 22.⚙️ Which of these is an inclined plane? (a) a doorknob (b) a see-saw (c) a crowbar (d) a slide
23. 23.🧺 Which of these is not needed for the ruler lever? (a) a mirror (b) a flat table (c) coins of one kind (d) a 30 cm ruler
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) both go up (d) the right side
25. 25.🧺 Do we need a 30 cm ruler for the ruler lever? (a) not needed (b) needed
26. 26.🧺 Do we need a magnet for the ruler lever? (a) needed (b) not needed
27. 27.True or false: a ramp uses a pulley. (a) True (b) False
28. 28.⚙️ Which simple machine is a see-saw? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
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 keep it the same (b) we change it (c) we measure it
30. 30.True or false: a steering wheel uses a pulley. (a) True (b) False
31. 31.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a 30 cm ruler (c) a balloon (d) a flat table
32. 32.⚖️ 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 change it (b) we keep it the same (c) we measure it
33. 33.True or false: a doorknob is a wheel and axle. (a) False (b) True
34. 34.True or false: a sloping road is a wheel and axle. (a) True (b) False
35. 35.⚖️ 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) True (b) False
36. 36.⚖️ 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
37. 37.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) a mirror (c) a balloon (d) a flat table
38. 38.⚖️ 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) distance from the pencil (c) the number of coins
39. 39.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 2 cm to the left of the pencil. How many coins must you place 1 cm to the right to balance 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