Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 649 · 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.🧺 Do we need a round pencil for the ruler lever? (a) not needed (b) needed
2. 2.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 6 cm to the left of the pencil. How many coins must you place 1 cm to the right to balance it?
3. 3.True or false: a see-saw is a lever. (a) False (b) True
4. 4.⚖️ 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 measure it (b) we change it (c) we keep it the same
5. 5.True or false: a flat table is needed for the ruler lever. (a) False (b) True
6. 6.⚖️ 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
7. 7.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 10 cm to the left of the pencil and 5 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
8. 8.True or false: a flat table is not needed for the ruler lever. (a) False (b) True
9. 9.🛟 What is a safe way to use a ruler as a lever? (a) bend it till it snaps (b) press it gently (c) stand on the ruler (d) flick coins at faces
10. 10.⚙️ Which of these uses a pulley? (a) a flagpole (b) a spoon lifting a lid (c) a steering wheel (d) a slide
11. 11.⚖️ 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
12. 12.⚖️ 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 number of coins
13. 13.🛟 Why should coins be kept away from very small children? (a) they are magnetic (b) they are too cold (c) they are too shiny (d) they may swallow them
14. 14.True or false: a see-saw uses a pulley. (a) False (b) True
15. 15.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit farther from middle (b) sit on the middle (c) sit closer to middle (d) jump up and down
16. 16.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 12 cm to the left of the pencil and 6 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
17. 17.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) a magnet (c) a flat table (d) turmeric powder
18. 18.⚖️ 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) the number of coins (c) which side goes down (d) the kind of coins
19. 19.True or false: a slide is a lever. (a) False (b) True
20. 20.⚙️ Which simple machine is a crowbar? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
21. 21.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) easier (b) impossible (c) harder (d) the same
22. 22.🧺 Do we need a flat table for the ruler lever? (a) needed (b) not needed
23. 23.⚙️ Which of these is a wheel and axle? (a) a spoon lifting a lid (b) a flagpole (c) a slide (d) a steering wheel
24. 24.⚖️ Coins on the two sides balance when coins × distance is ___. (a) always 10 (b) zero (c) bigger on the left (d) equal on both sides
25. 25.⚙️ Which of these is a wheel and axle? (a) a flagpole (b) a sloping road (c) a well pulley (d) a tap handle
26. 26.⚖️ 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 change it (b) we keep it the same (c) we measure it
27. 27.⚖️ 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) where the pencil is (d) the kind of coins
28. 28.True or false: a bottle opener is an inclined plane. (a) False (b) True
29. 29.⚙️ Which simple machine is a tap handle? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
30. 30.🧺 Do we need coins of one kind 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) a round pencil (c) turmeric powder (d) a flat table
32. 32.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a magnet (b) coins of one kind (c) a flat table (d) a 30 cm ruler
33. 33.⚙️ Which of these is a lever? (a) a slide (b) a crane (c) a well pulley (d) a crowbar
34. 34.True or false: a sloping road is an inclined plane. (a) True (b) False
35. 35.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) where the pencil is (b) distance from the pencil (c) which side goes down
36. 36.⚖️ 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) False (b) True
37. 37.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) a lever boosts your push (b) the spoon is hot (c) the spoon is magnetic (d) the lid gets softer
38. 38.🧺 Do we need turmeric powder for the ruler lever? (a) needed (b) not needed
39. 39.🧺 Do we need a battery cell for the ruler lever? (a) needed (b) not needed
40. 40.True or false: a round pencil is needed for the ruler lever. (a) True (b) False

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