Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 109 · 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? True or false: where the pencil is is kept the same. (a) False (b) True
2. 2.🧺 Do we need a 30 cm ruler for the ruler lever? (a) not needed (b) needed
3. 3.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a flat table (c) coins of one kind (d) a battery cell
4. 4.⚖️ 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 change it (b) we keep it the same (c) we measure it
5. 5.⚙️ Which of these is an inclined plane? (a) a tap handle (b) a doorknob (c) a steering wheel (d) a sloping road
6. 6.⚖️ 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
7. 7.⚖️ 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 same ruler (b) where the pencil is (c) distance from the pencil (d) the number of coins
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 keep it the same (c) we measure it
9. 9.⚖️ On a see-saw, how can a light child balance a heavier child? (a) jump up and down (b) sit on the middle (c) sit farther from middle (d) sit closer to middle
10. 10.True or false: a bottle opener is a lever. (a) True (b) False
11. 11.⚖️ Coins on the two sides balance when coins × distance is ___. (a) always 10 (b) zero (c) bigger on the left (d) equal on both sides
12. 12.⚖️ 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 kind of coins (c) which side goes down
13. 13.⚙️ Which simple machine is a sloping road? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
14. 14.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 4 cm to the left of the pencil and 2 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
15. 15.🧺 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 magnet (d) a round pencil
16. 16.⚙️ Which of these uses a pulley? (a) a steering wheel (b) a slide (c) a flagpole (d) a sloping road
17. 17.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) a flat table (c) a battery cell (d) turmeric powder
18. 18.🛟 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
19. 19.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: which side goes down is kept the same. (a) False (b) True
20. 20.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the spoon is magnetic (b) the spoon is hot (c) the lid gets softer (d) a lever boosts your push
21. 21.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) impossible (b) the same (c) harder (d) easier
22. 22.⚖️ 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
23. 23.🧺 Do we need a battery cell for the ruler lever? (a) needed (b) not needed
24. 24.🧺 Do we need a balloon for the ruler lever? (a) not needed (b) needed
25. 25.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) a round pencil (c) a battery cell (d) turmeric powder
26. 26.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) a round pencil (c) a mirror (d) coins of one kind
27. 27.⚙️ Which of these is a wheel and axle? (a) a doorknob (b) a well pulley (c) a sloping road (d) a spoon lifting a lid
28. 28.True or false: a magnet is not needed for the ruler lever. (a) False (b) True
29. 29.⚖️ A ruler balances on a pencil at its middle. You place 5 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?
30. 30.True or false: a tap handle is a wheel and axle. (a) False (b) True
31. 31.🧺 Do we need a round pencil for the ruler lever? (a) not needed (b) needed
32. 32.True or false: a balloon is not needed for the ruler lever. (a) False (b) True
33. 33.🧺 Do we need coins of one kind 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? Which of these is kept the same? (a) where the pencil is (b) which side goes down (c) distance from the pencil
35. 35.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 12 cm to the left of the pencil and 6 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
36. 36.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) a 30 cm ruler (c) a battery cell (d) coins of one kind
37. 37.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a 30 cm ruler (c) yeast (d) coins of one kind
38. 38.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? What do we do with “the same ruler”? (a) we keep it the same (b) we measure it (c) we change it
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 right side (b) the left side (c) both go up (d) neither, it balances
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) where the pencil is (b) which side goes down (c) the number of coins (d) distance from the pencil

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