Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 757 · 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 the one thing we change? (a) where the pencil is (b) distance from the pencil (c) the same ruler (d) the number of coins
2. 2.⚙️ Which of these is an inclined plane? (a) a ramp (b) a see-saw (c) a spoon lifting a lid (d) a flagpole
3. 3.⚙️ Which simple machine is a bottle opener? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
4. 4.🧺 Do we need a battery cell for the ruler lever? (a) needed (b) not needed
5. 5.True or false: a 30 cm ruler is not needed for the ruler lever. (a) False (b) True
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 the one thing we change. (a) False (b) True
7. 7.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a flat table (c) a mirror (d) a 30 cm ruler
8. 8.True or false: a slide is an inclined plane. (a) False (b) True
9. 9.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit closer to middle (b) sit on the middle (c) sit farther from middle (d) jump up and down
10. 10.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the kind of coins is kept the same. (a) False (b) True
11. 11.⚖️ 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 number of coins (c) the kind of coins (d) which side goes down
12. 12.🧺 Which of these is not needed for the ruler lever? (a) yeast (b) a round pencil (c) coins of one kind (d) a 30 cm ruler
13. 13.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a round pencil (c) a battery cell (d) coins of one kind
14. 14.⚙️ Which simple machine is a slide? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
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) the right side (b) neither, it balances (c) the left side (d) both go up
16. 16.⚙️ Which of these uses a pulley? (a) a sloping road (b) a steering wheel (c) a flagpole (d) a see-saw
17. 17.⚖️ 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 keep it the same (b) we change it (c) we measure it
18. 18.True or false: a magnet is not needed for the ruler lever. (a) False (b) True
19. 19.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the spoon is hot (b) the spoon is magnetic (c) a lever boosts your push (d) the lid gets softer
20. 20.True or false: coins of one kind is needed for the ruler lever. (a) False (b) True
21. 21.⚖️ 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) True (b) False
22. 22.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a 30 cm ruler (c) a round pencil (d) a battery cell
23. 23.🛟 Why should coins be kept away from very small children? (a) they may swallow them (b) they are too shiny (c) they are too cold (d) they are magnetic
24. 24.⚖️ 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
25. 25.True or false: a battery cell is not needed for the ruler lever. (a) True (b) False
26. 26.⚙️ Which of these is an inclined plane? (a) a crowbar (b) a flagpole (c) a sloping road (d) a see-saw
27. 27.🧺 Do we need coins of one kind for the ruler lever? (a) not needed (b) needed
28. 28.⚙️ Which of these is a lever? (a) a crane (b) a well pulley (c) a bottle opener (d) a sloping road
29. 29.True or false: a balloon is needed for the ruler lever. (a) False (b) True
30. 30.True or false: a flagpole uses a pulley. (a) False (b) True
31. 31.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 5 cm to the left of the pencil. How many coins must you place 3 cm to the right to balance it?
32. 32.⚖️ Coins on the two sides balance when coins × distance is ___. (a) zero (b) bigger on the left (c) always 10 (d) equal on both sides
33. 33.True or false: a balloon is not needed for the ruler lever. (a) True (b) False
34. 34.⚖️ What is the turning point of a lever called? (a) the load (b) the axle (c) the effort (d) the fulcrum
35. 35.⚙️ Which of these is a wheel and axle? (a) a steering wheel (b) a crowbar (c) a flagpole (d) a spoon lifting a lid
36. 36.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) the same (b) easier (c) harder (d) impossible
37. 37.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 2 cm to the left of the pencil. How many coins must you place 6 cm to the right to balance it?
38. 38.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the same ruler is kept the same. (a) False (b) True
39. 39.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) yeast (c) a 30 cm ruler (d) coins of one kind
40. 40.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 2 cm to the left of the pencil. How many coins must you place 6 cm to the right to balance it?

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