Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 952 · 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.True or false: a spoon lifting a lid is a lever. (a) False (b) True
2. 2.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 8 cm to the left of the pencil. How many coins must you place 12 cm to the right to balance it?
3. 3.⚖️ What is the turning point of a lever called? (a) the fulcrum (b) the axle (c) the effort (d) the load
4. 4.🧺 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 magnet (d) coins of one kind
5. 5.🧺 Do we need yeast for the ruler lever? (a) needed (b) not needed
6. 6.True or false: a bottle opener is a lever. (a) False (b) True
7. 7.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the same ruler is the one thing we change. (a) True (b) False
8. 8.⚖️ 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 change it (b) we measure it (c) we keep it the same
9. 9.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 6 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?
10. 10.🛟 Why should coins be kept away from very small children? (a) they may swallow them (b) they are too shiny (c) they are magnetic (d) they are too cold
11. 11.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a round pencil (c) a 30 cm ruler (d) yeast
12. 12.🧺 Do we need a magnet for the ruler lever? (a) not needed (b) needed
13. 13.🧺 Do we need a round pencil for the ruler lever? (a) needed (b) not needed
14. 14.True or false: a sloping road is an inclined plane. (a) True (b) False
15. 15.🧺 Do we need coins of one kind for the ruler lever? (a) needed (b) not needed
16. 16.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) turmeric powder (c) coins of one kind (d) a flat table
17. 17.🔮 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) both go up (d) neither, it balances
18. 18.⚙️ Which simple machine is a crowbar? (a) a wheel and axle (b) an inclined plane (c) a pulley (d) a lever
19. 19.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) harder (b) the same (c) impossible (d) easier
20. 20.🧺 Do we need a flat table for the ruler lever? (a) not needed (b) needed
21. 21.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) turmeric powder (c) a flat table (d) a 30 cm ruler
22. 22.⚖️ 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
23. 23.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a 30 cm ruler (c) a flat table (d) a battery cell
24. 24.True or false: a battery cell is not needed for the ruler lever. (a) False (b) True
25. 25.⚖️ 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
26. 26.🛟 What is a safe way to use a ruler as a lever? (a) press it gently (b) flick coins at faces (c) bend it till it snaps (d) stand on the ruler
27. 27.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 3 cm to the left of the pencil. How many coins must you place 5 cm to the right to balance it?
28. 28.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the same ruler is what we measure. (a) True (b) False
29. 29.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit farther from middle (b) jump up and down (c) sit closer to middle (d) sit on the middle
30. 30.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) a battery cell (c) a magnet (d) a flat table
31. 31.⚙️ Which of these is an inclined plane? (a) a doorknob (b) a ramp (c) a crowbar (d) a steering wheel
32. 32.True or false: a tap handle is a wheel and axle. (a) True (b) False
33. 33.🧺 Do we need turmeric powder for the ruler lever? (a) needed (b) not needed
34. 34.⚖️ 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 measure it (c) we change it
35. 35.⚙️ Which simple machine is a ramp? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
36. 36.True or false: a balloon is needed for the ruler lever. (a) True (b) False
37. 37.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: which side goes down is the one thing we change. (a) True (b) False
38. 38.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 4 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?
39. 39.⚙️ Which of these is a wheel and axle? (a) a steering wheel (b) a ramp (c) a spoon lifting a lid (d) a see-saw
40. 40.⚖️ 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 kind of coins (c) which side goes down (d) the same ruler

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