Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 445 · 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? What do we do with “the number of coins”? (a) we change it (b) we measure it (c) we keep it the same
2. 2.🔮 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 right side (b) the left side (c) neither, it balances (d) both go up
3. 3.🛟 Why should coins be kept away from very small children? (a) they may swallow them (b) they are too cold (c) they are magnetic (d) they are too shiny
4. 4.⚖️ 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
5. 5.True or false: a spoon lifting a lid uses a pulley. (a) True (b) False
6. 6.⚖️ 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
7. 7.True or false: a mirror is not needed for the ruler lever. (a) False (b) True
8. 8.⚙️ Which simple machine is a flagpole? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
9. 9.🧺 Which of these is needed for the ruler lever? (a) a round pencil (b) a mirror (c) a battery cell (d) turmeric powder
10. 10.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a round pencil (c) a magnet (d) a 30 cm ruler
11. 11.⚙️ Which simple machine is a well pulley? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
12. 12.True or false: turmeric powder is needed for the ruler lever. (a) False (b) True
13. 13.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) yeast (c) turmeric powder (d) coins of one kind
14. 14.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is what we measure? (a) where the pencil is (b) which side goes down (c) the same ruler (d) distance from the pencil
15. 15.⚙️ Which simple machine is a tap handle? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
16. 16.🧺 Which of these is not needed for the ruler lever? (a) a battery cell (b) a 30 cm ruler (c) a round pencil (d) coins of one kind
17. 17.⚙️ Which of these uses a pulley? (a) a see-saw (b) a well pulley (c) a slide (d) a spoon lifting a lid
18. 18.True or false: a see-saw is a lever. (a) False (b) True
19. 19.🛟 What is a safe way to use a ruler as a lever? (a) flick coins at faces (b) stand on the ruler (c) press it gently (d) bend it till it snaps
20. 20.⚖️ 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) the number of coins (c) distance from the pencil
21. 21.⚙️ Which of these is a wheel and axle? (a) a well pulley (b) a tap handle (c) a crane (d) a bottle opener
22. 22.True or false: coins of one kind is needed for the ruler lever. (a) True (b) False
23. 23.⚙️ Which simple machine is a sloping road? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
24. 24.🧺 Do we need yeast for the ruler lever? (a) not needed (b) needed
25. 25.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 6 cm to the left of the pencil. How many coins must you place 6 cm to the right to balance it?
26. 26.⚙️ Which simple machine is a doorknob? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
27. 27.⚖️ 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 kind of coins
28. 28.⚖️ 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 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 round pencil (b) a 30 cm ruler (c) a balloon (d) coins of one kind
30. 30.🧺 Which of these is needed for the ruler lever? (a) a flat table (b) turmeric powder (c) a balloon (d) a magnet
31. 31.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a mirror (c) coins of one kind (d) a round pencil
32. 32.🧺 Which of these is needed for the ruler lever? (a) yeast (b) a mirror (c) a magnet (d) a 30 cm ruler
33. 33.True or false: a 30 cm ruler is needed for the ruler lever. (a) True (b) False
34. 34.⚙️ Which of these uses a pulley? (a) a sloping road (b) a crowbar (c) a doorknob (d) a crane
35. 35.🧺 Do we need a flat table for the ruler lever? (a) needed (b) not needed
36. 36.⚙️ Which simple machine is a crowbar? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
37. 37.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 1 cm to the left of the pencil. How many coins must you place 6 cm to the right to balance it?
38. 38.True or false: a doorknob uses a pulley. (a) False (b) True
39. 39.⚙️ Which simple machine is a bottle opener? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
40. 40.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a 30 cm ruler (c) coins of one kind (d) a mirror

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