Lever Experiment Worksheet

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

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