Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 720 · 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 steering wheel uses a pulley. (a) False (b) True
2. 2.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 4 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?
3. 3.🛟 What is a safe way to use a ruler as a lever? (a) press it gently (b) flick coins at faces (c) bend it till it snaps (d) stand on the ruler
4. 4.⚙️ Which of these is a wheel and axle? (a) a tap handle (b) a slide (c) a sloping road (d) a bottle opener
5. 5.⚖️ 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 same ruler (b) the kind of coins (c) the number of coins (d) distance from the pencil
6. 6.⚙️ Which simple machine is a doorknob? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
7. 7.⚖️ What is the turning point of a lever called? (a) the effort (b) the axle (c) the load (d) the fulcrum
8. 8.⚙️ Which simple machine is a well pulley? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
9. 9.⚙️ Which simple machine is a crowbar? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
10. 10.🧺 Which of these is not needed for the ruler lever? (a) a mirror (b) a round pencil (c) coins of one kind (d) a 30 cm ruler
11. 11.⚖️ 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 same ruler
12. 12.⚖️ 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
13. 13.True or false: a round pencil is not needed for the ruler lever. (a) True (b) False
14. 14.True or false: yeast is needed for the ruler lever. (a) True (b) False
15. 15.⚙️ Which of these uses a pulley? (a) a well pulley (b) a ramp (c) a slide (d) a steering wheel
16. 16.⚖️ Coins on the two sides balance when coins × distance is ___. (a) equal on both sides (b) bigger on the left (c) always 10 (d) zero
17. 17.⚖️ 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 keep it the same (b) we measure it (c) we change it
18. 18.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the spoon is hot (b) the lid gets softer (c) a lever boosts your push (d) the spoon is magnetic
19. 19.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) yeast (c) a 30 cm ruler (d) coins of one kind
20. 20.🧺 Which of these is needed for the ruler lever? (a) a battery cell (b) a mirror (c) a flat table (d) a magnet
21. 21.🛟 Why should coins be kept away from very small children? (a) they are magnetic (b) they are too shiny (c) they may swallow them (d) they are too cold
22. 22.True or false: turmeric powder is not needed for the ruler lever. (a) False (b) True
23. 23.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) a balloon (c) coins of one kind (d) a magnet
24. 24.⚙️ Which of these is a lever? (a) a spoon lifting a lid (b) a well pulley (c) a slide (d) a doorknob
25. 25.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a round pencil (c) a balloon (d) a 30 cm ruler
26. 26.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is what we measure? (a) the kind of coins (b) the number of coins (c) which side goes down (d) distance from the pencil
27. 27.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the kind of coins is kept the same. (a) True (b) False
28. 28.⚖️ 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
29. 29.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) turmeric powder (c) coins of one kind (d) a round pencil
30. 30.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) a battery cell (c) a round pencil (d) a 30 cm ruler
31. 31.⚖️ 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
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 measure it (b) we keep it the same (c) we change it
33. 33.⚙️ Which of these is a wheel and axle? (a) a sloping road (b) a well pulley (c) a ramp (d) a doorknob
34. 34.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the same ruler is the one thing we change. (a) False (b) True
35. 35.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) a round pencil (c) yeast (d) a battery cell
36. 36.🔮 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 right side (c) the left side (d) both go up
37. 37.⚙️ Which of these is a wheel and axle? (a) a see-saw (b) a sloping road (c) a spoon lifting a lid (d) a steering wheel
38. 38.⚖️ 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
39. 39.⚖️ 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) which side goes down (c) distance from the pencil
40. 40.⚖️ 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) False (b) True

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