Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 988 · 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.🛟 What is a safe way to use a ruler as a lever? (a) press it gently (b) flick coins at faces (c) stand on the ruler (d) bend it till it snaps
2. 2.⚖️ 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) distance from the pencil (b) which side goes down (c) the number of coins (d) the kind of coins
3. 3.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the same ruler is kept the same. (a) False (b) True
4. 4.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) turmeric powder (c) a flat table (d) a round pencil
5. 5.🔮 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) both go up (c) the right side (d) the left side
6. 6.True or false: yeast is not needed for the ruler lever. (a) False (b) True
7. 7.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) a 30 cm ruler (c) a balloon (d) a magnet
8. 8.🧺 Which of these is needed for the ruler lever? (a) coins of one kind (b) a magnet (c) a battery cell (d) yeast
9. 9.True or false: a battery cell is not needed for the ruler lever. (a) False (b) True
10. 10.⚖️ 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) True (b) False
11. 11.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit on the middle (b) sit closer to middle (c) jump up and down (d) sit farther from middle
12. 12.True or false: a battery cell is needed for the ruler lever. (a) True (b) False
13. 13.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the spoon is hot (b) a lever boosts your push (c) the spoon is magnetic (d) the lid gets softer
14. 14.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 10 cm to the left of the pencil. How many coins must you place 4 cm to the right to balance it?
15. 15.⚙️ Which of these is a wheel and axle? (a) a spoon lifting a lid (b) a steering wheel (c) a sloping road (d) a well pulley
16. 16.🧺 Do we need coins of one kind for the ruler lever? (a) not needed (b) needed
17. 17.True or false: a slide is a wheel and axle. (a) False (b) True
18. 18.⚙️ Which of these is a lever? (a) a bottle opener (b) a crane (c) a well pulley (d) a flagpole
19. 19.⚖️ 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 number of coins (c) which side goes down (d) where the pencil is
20. 20.⚙️ Which simple machine is a sloping road? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
21. 21.⚖️ 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
22. 22.True or false: a 30 cm ruler is not needed for the ruler lever. (a) True (b) False
23. 23.True or false: a round pencil is not needed for the ruler lever. (a) False (b) True
24. 24.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 6 cm to the left of the pencil. How many coins must you place 6 cm to the right to balance it?
25. 25.⚙️ Which simple machine is a ramp? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
26. 26.⚖️ 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 change it (b) we measure it (c) we keep it the same
27. 27.⚙️ Which of these uses a pulley? (a) a steering wheel (b) a well pulley (c) a sloping road (d) a slide
28. 28.🧺 Do we need a 30 cm ruler for the ruler lever? (a) not needed (b) needed
29. 29.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a 30 cm ruler (c) a battery cell (d) a flat table
30. 30.🧺 Do we need a balloon for the ruler lever? (a) not needed (b) needed
31. 31.🧺 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) a balloon (d) a flat table
32. 32.True or false: a flagpole is an inclined plane. (a) True (b) False
33. 33.True or false: a 30 cm ruler is needed for the ruler lever. (a) False (b) True
34. 34.⚖️ 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) False (b) True
35. 35.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a round pencil (c) yeast (d) a flat table
36. 36.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) a balloon (c) yeast (d) a round pencil
37. 37.⚙️ Which simple machine is a spoon lifting a lid? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
38. 38.⚙️ Which of these is an inclined plane? (a) a bottle opener (b) a doorknob (c) a flagpole (d) a slide
39. 39.⚖️ 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 keep it the same (b) we change it (c) we measure it
40. 40.True or false: a ramp is a lever. (a) False (b) True

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