Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 905 · 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 crowbar uses a pulley. (a) True (b) False
2. 2.🧺 Do we need a flat table for the ruler lever? (a) not needed (b) needed
3. 3.True or false: turmeric powder is needed for the ruler lever. (a) False (b) True
4. 4.⚙️ Which simple machine is a well pulley? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
5. 5.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: where the pencil is is what we measure. (a) False (b) True
6. 6.True or false: a battery cell is needed for the ruler lever. (a) False (b) True
7. 7.🧺 Which of these is not needed for the ruler lever? (a) turmeric powder (b) coins of one kind (c) a round pencil (d) a 30 cm ruler
8. 8.True or false: a 30 cm ruler is not needed for the ruler lever. (a) False (b) True
9. 9.🧺 Do we need coins of one kind for the ruler lever? (a) not needed (b) needed
10. 10.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) a lever boosts your push (b) the lid gets softer (c) the spoon is hot (d) the spoon is magnetic
11. 11.True or false: a slide is an inclined plane. (a) False (b) True
12. 12.⚙️ Which simple machine is a doorknob? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
13. 13.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit farther from middle (b) sit closer to middle (c) jump up and down (d) sit on the middle
14. 14.⚙️ Which of these uses a pulley? (a) a crane (b) a steering wheel (c) a slide (d) a bottle opener
15. 15.True or false: a flagpole is an inclined plane. (a) True (b) False
16. 16.True or false: a balloon is needed for the ruler lever. (a) True (b) False
17. 17.⚖️ 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
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) the number of coins (b) distance from the pencil (c) which side goes down (d) the kind of coins
19. 19.⚖️ 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
20. 20.🛟 What is a safe way to use a ruler as a lever? (a) stand on the ruler (b) bend it till it snaps (c) press it gently (d) flick coins at faces
21. 21.⚖️ Coins on the two sides balance when coins × distance is ___. (a) bigger on the left (b) always 10 (c) equal on both sides (d) zero
22. 22.⚙️ Which simple machine is a spoon lifting a lid? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
23. 23.🧺 Do we need a mirror for the ruler lever? (a) needed (b) not needed
24. 24.⚖️ 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
25. 25.True or false: a see-saw uses a pulley. (a) True (b) False
26. 26.⚙️ Which of these uses a pulley? (a) a spoon lifting a lid (b) a well pulley (c) a see-saw (d) a doorknob
27. 27.🛟 Why should coins be kept away from very small children? (a) they are magnetic (b) they may swallow them (c) they are too cold (d) they are too shiny
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 keep it the same (c) we change it
29. 29.True or false: yeast is not needed for the ruler lever. (a) True (b) False
30. 30.⚙️ Which of these is a lever? (a) a ramp (b) a crane (c) a spoon lifting a lid (d) a tap handle
31. 31.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a flat table (c) a round pencil (d) turmeric powder
32. 32.True or false: a flat table is not needed for the ruler lever. (a) False (b) True
33. 33.⚖️ A ruler balances on a pencil at its middle. You place 2 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?
34. 34.⚖️ What is the turning point of a lever called? (a) the axle (b) the effort (c) the load (d) the fulcrum
35. 35.🧺 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 mirror (d) coins of one kind
36. 36.True or false: a crane is a lever. (a) True (b) False
37. 37.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) a round pencil (c) a flat table (d) a balloon
38. 38.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) a flat table (c) turmeric powder (d) a battery cell
39. 39.🔮 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
40. 40.True or false: a crowbar is a wheel and axle. (a) False (b) True

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