Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 393 · 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) the kind of coins (b) where the pencil is (c) which side goes down (d) distance from the pencil
2. 2.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) turmeric powder (c) coins of one kind (d) a round pencil
3. 3.⚙️ Which of these is an inclined plane? (a) a see-saw (b) a crane (c) a crowbar (d) a sloping road
4. 4.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a 30 cm ruler (c) a balloon (d) coins of one kind
5. 5.🧺 Do we need yeast for the ruler lever? (a) needed (b) not needed
6. 6.🛟 Why should coins be kept away from very small children? (a) they are too cold (b) they may swallow them (c) they are magnetic (d) they are too shiny
7. 7.🧺 Which of these is needed for the ruler lever? (a) yeast (b) a mirror (c) turmeric powder (d) coins of one kind
8. 8.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 5 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?
9. 9.🛟 What is a safe way to use a ruler as a lever? (a) flick coins at faces (b) press it gently (c) stand on the ruler (d) bend it till it snaps
10. 10.True or false: coins of one kind is needed for the ruler lever. (a) True (b) False
11. 11.⚖️ 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 measure it (b) we keep it the same (c) we change it
12. 12.True or false: a flat table is not needed for the ruler lever. (a) True (b) False
13. 13.True or false: a battery cell is needed for the ruler lever. (a) True (b) False
14. 14.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) a magnet (c) a 30 cm ruler (d) yeast
15. 15.🔮 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) the right side (c) both go up (d) the left side
16. 16.⚙️ Which simple machine is a see-saw? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
17. 17.⚖️ 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
18. 18.⚖️ 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 number of coins (b) distance from the pencil (c) which side goes down
19. 19.🧺 Do we need a magnet for the ruler lever? (a) not needed (b) needed
20. 20.⚖️ A ruler balances on a pencil at its middle. You place 2 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?
21. 21.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a flat table (c) a magnet (d) a round pencil
22. 22.⚙️ Which simple machine is a slide? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
23. 23.True or false: a flagpole is a lever. (a) False (b) True
24. 24.⚖️ 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?
25. 25.⚙️ Which of these is a lever? (a) a sloping road (b) a flagpole (c) a bottle opener (d) a doorknob
26. 26.⚖️ 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) distance from the pencil (c) where the pencil is
27. 27.⚙️ Which simple machine is a crane? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
28. 28.⚖️ 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 measure it (b) we change it (c) we keep it the same
29. 29.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) impossible (b) the same (c) easier (d) harder
30. 30.True or false: a mirror is needed for the ruler lever. (a) False (b) True
31. 31.⚙️ Which of these is a lever? (a) a tap handle (b) a doorknob (c) a ramp (d) a spoon lifting a lid
32. 32.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) yeast (c) a balloon (d) a round pencil
33. 33.True or false: a see-saw is a wheel and axle. (a) False (b) True
34. 34.⚖️ 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) the same ruler (c) which side goes down
35. 35.⚖️ 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?
36. 36.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 6 cm to the left of the pencil and 3 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
37. 37.True or false: a crane is a wheel and axle. (a) True (b) False
38. 38.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the kind of coins is the one thing we change. (a) False (b) True
39. 39.🧺 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 battery cell (d) a flat table
40. 40.True or false: a mirror is not needed for the ruler lever. (a) False (b) True

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