Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 728 · 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.⚙️ Which of these uses a pulley? (a) a ramp (b) a sloping road (c) a flagpole (d) a slide
2. 2.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) yeast (c) a magnet (d) a round pencil
3. 3.True or false: a crowbar is a lever. (a) True (b) False
4. 4.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a magnet (c) a round pencil (d) coins of one kind
5. 5.⚖️ 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
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 right side (c) neither, it balances (d) the left side
7. 7.⚖️ 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 measure it (b) we change it (c) we keep it the same
8. 8.True or false: turmeric powder is needed for the ruler lever. (a) True (b) False
9. 9.⚖️ What is the turning point of a lever called? (a) the fulcrum (b) the effort (c) the axle (d) the load
10. 10.⚖️ 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
11. 11.⚙️ Which of these is a lever? (a) a flagpole (b) a tap handle (c) a crowbar (d) a steering wheel
12. 12.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a round pencil (c) turmeric powder (d) a 30 cm ruler
13. 13.⚙️ Which simple machine is a spoon lifting a lid? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
14. 14.⚙️ Which of these is a wheel and axle? (a) a slide (b) a doorknob (c) a see-saw (d) a bottle opener
15. 15.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) harder (b) easier (c) impossible (d) the same
16. 16.🧺 Which of these is needed for the ruler lever? (a) a 30 cm ruler (b) a battery cell (c) a balloon (d) a magnet
17. 17.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a battery cell (c) a 30 cm ruler (d) a flat table
18. 18.⚖️ 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
19. 19.⚖️ 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
20. 20.⚖️ 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 measure it (b) we keep it the same (c) we change it
21. 21.⚙️ Which of these is an inclined plane? (a) a steering wheel (b) a crowbar (c) a well pulley (d) a sloping road
22. 22.True or false: a well pulley is a lever. (a) False (b) True
23. 23.⚙️ Which of these is an inclined plane? (a) a tap handle (b) a steering wheel (c) a well pulley (d) a slide
24. 24.⚖️ Coins on the two sides balance when coins × distance is ___. (a) zero (b) bigger on the left (c) always 10 (d) equal on both sides
25. 25.⚙️ Which of these uses a pulley? (a) a well pulley (b) a ramp (c) a crowbar (d) a spoon lifting a lid
26. 26.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the kind of coins is the one thing we change. (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 measure it (b) we change it (c) we keep it the same
28. 28.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) a lever boosts your push (b) the lid gets softer (c) the spoon is hot (d) the spoon is magnetic
29. 29.True or false: a round pencil is not needed for the ruler lever. (a) True (b) False
30. 30.⚖️ 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
31. 31.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: where the pencil is is what we measure. (a) False (b) True
32. 32.⚖️ 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 2 cm to the right to balance it?
33. 33.True or false: coins of one kind is needed for the ruler lever. (a) False (b) True
34. 34.True or false: a mirror is needed for the ruler lever. (a) True (b) False
35. 35.True or false: yeast is needed for the ruler lever. (a) False (b) True
36. 36.True or false: a battery cell is needed for the ruler lever. (a) False (b) True
37. 37.⚙️ Which simple machine is a ramp? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
38. 38.True or false: turmeric powder is not needed for the ruler lever. (a) False (b) True
39. 39.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 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?
40. 40.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 2 cm to the left of the pencil. How many coins must you place 3 cm to the right to balance it?

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