Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 682 · 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.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a flat table (c) coins of one kind (d) a balloon
2. 2.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the number of coins is kept the same. (a) False (b) True
3. 3.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the spoon is hot (b) a lever boosts your push (c) the lid gets softer (d) the spoon is magnetic
4. 4.True or false: a 30 cm ruler is needed for the ruler lever. (a) False (b) True
5. 5.⚖️ 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 measure it (b) we change it (c) we keep it the same
6. 6.⚙️ Which simple machine is a tap handle? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
7. 7.True or false: a mirror is not needed for the ruler lever. (a) False (b) True
8. 8.🛟 What is a safe way to use a ruler as a lever? (a) press it gently (b) stand on the ruler (c) flick coins at faces (d) bend it till it snaps
9. 9.🧺 Do we need a flat table for the ruler lever? (a) not needed (b) needed
10. 10.⚖️ 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
11. 11.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: where the pencil is is kept the same. (a) True (b) False
12. 12.⚖️ What is the turning point of a lever called? (a) the load (b) the axle (c) the effort (d) the fulcrum
13. 13.🔮 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
14. 14.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 1 cm to the left of the pencil and 1 coin on the right. How many cm from the pencil must the right-hand coins go to balance it?
15. 15.⚖️ 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
16. 16.🧺 Do we need a magnet for the ruler lever? (a) needed (b) not needed
17. 17.⚙️ Which of these is a lever? (a) a doorknob (b) a see-saw (c) a steering wheel (d) a flagpole
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) where the pencil is (b) which side goes down (c) the same ruler (d) distance from the pencil
19. 19.⚙️ Which of these is a wheel and axle? (a) a flagpole (b) a well pulley (c) a sloping road (d) a tap handle
20. 20.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) a mirror (c) coins of one kind (d) a flat table
21. 21.⚙️ Which of these is an inclined plane? (a) a flagpole (b) a slide (c) a tap handle (d) a bottle opener
22. 22.⚙️ Which of these is a lever? (a) a crane (b) a slide (c) a tap handle (d) a crowbar
23. 23.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) easier (b) impossible (c) harder (d) the same
24. 24.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) a magnet (c) a round pencil (d) a battery cell
25. 25.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) a flat table (c) yeast (d) a battery cell
26. 26.⚖️ 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 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? True or false: the kind of coins is the one thing we change. (a) True (b) False
28. 28.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a 30 cm ruler (c) a round pencil (d) a balloon
29. 29.🧺 Do we need yeast for the ruler lever? (a) not needed (b) needed
30. 30.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 3 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?
31. 31.True or false: coins of one kind is not needed for the ruler lever. (a) False (b) True
32. 32.⚙️ Which of these is a lever? (a) a tap handle (b) a flagpole (c) a spoon lifting a lid (d) a slide
33. 33.⚙️ Which simple machine is a ramp? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
34. 34.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) coins of one kind (c) a round pencil (d) a battery cell
35. 35.True or false: turmeric powder is needed for the ruler lever. (a) False (b) True
36. 36.True or false: a crowbar is a wheel and axle. (a) True (b) False
37. 37.⚙️ Which simple machine is a well pulley? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
38. 38.⚖️ 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) the kind of coins
39. 39.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a round pencil (c) a 30 cm ruler (d) yeast
40. 40.🧺 Do we need a balloon for the ruler lever? (a) not needed (b) needed

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