Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 417 · 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.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is what we measure? (a) distance from the pencil (b) the kind of coins (c) where the pencil is (d) which side goes down
2. 2.True or false: a mirror is not needed for the ruler lever. (a) False (b) True
3. 3.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) impossible (b) easier (c) the same (d) harder
4. 4.⚙️ Which simple machine is a ramp? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
5. 5.🧺 Do we need a 30 cm ruler for the ruler lever? (a) needed (b) not needed
6. 6.True or false: a flagpole is an inclined plane. (a) True (b) False
7. 7.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) a balloon (c) a round pencil (d) a battery cell
8. 8.🧺 Do we need coins of one kind for the ruler lever? (a) not needed (b) needed
9. 9.True or false: a round pencil is needed for the ruler lever. (a) True (b) False
10. 10.True or false: a flat table is needed for the ruler lever. (a) False (b) True
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) the kind of coins (b) which side goes down (c) distance from the pencil
12. 12.True or false: a flat table is not needed for the ruler lever. (a) False (b) True
13. 13.🧺 Do we need a flat table for the ruler lever? (a) needed (b) not needed
14. 14.⚙️ Which simple machine is a spoon lifting a lid? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
15. 15.True or false: turmeric powder is not needed for the ruler lever. (a) True (b) False
16. 16.⚖️ 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
17. 17.True or false: a balloon is needed for the ruler lever. (a) True (b) False
18. 18.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 8 cm to the left of the pencil and 4 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
19. 19.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 6 cm to the left of the pencil. How many coins must you place 4 cm to the right to balance it?
20. 20.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 12 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?
21. 21.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit farther from middle (b) jump up and down (c) sit closer to middle (d) sit on the middle
22. 22.⚙️ Which of these is an inclined plane? (a) a steering wheel (b) a flagpole (c) a slide (d) a bottle opener
23. 23.⚖️ 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
24. 24.⚖️ 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
25. 25.⚙️ Which of these is an inclined plane? (a) a doorknob (b) a ramp (c) a steering wheel (d) a well pulley
26. 26.True or false: yeast is needed for the ruler lever. (a) False (b) True
27. 27.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a round pencil (c) a flat table (d) yeast
28. 28.⚖️ 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
29. 29.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) coins of one kind (c) turmeric powder (d) a round pencil
30. 30.⚖️ 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
31. 31.⚖️ 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 same ruler (b) distance from the pencil (c) which side goes down
32. 32.⚖️ 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
33. 33.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: distance from the pencil is kept the same. (a) True (b) False
34. 34.🧺 Which of these is needed for the ruler lever? (a) a battery cell (b) a balloon (c) a mirror (d) a flat table
35. 35.🧺 Do we need a mirror for the ruler lever? (a) needed (b) not needed
36. 36.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the same ruler is what we measure. (a) True (b) False
37. 37.⚖️ 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
38. 38.🧺 Do we need a round pencil for the ruler lever? (a) needed (b) not needed
39. 39.⚙️ Which of these is a lever? (a) a tap handle (b) a crane (c) a see-saw (d) a slide
40. 40.🛟 What is a safe way to use a ruler as a lever? (a) flick coins at faces (b) bend it till it snaps (c) stand on the ruler (d) press it gently

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