Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 769 · 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.🧺 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 mirror (d) a round pencil
2. 2.⚖️ Coins on the two sides balance when coins × distance is ___. (a) bigger on the left (b) always 10 (c) zero (d) equal on both sides
3. 3.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 1 cm to the left of the pencil. How many coins must you place 1 cm to the right to balance it?
4. 4.True or false: a see-saw is an inclined plane. (a) False (b) True
5. 5.🧺 Do we need a balloon for the ruler lever? (a) not needed (b) needed
6. 6.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 2 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?
7. 7.⚖️ 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
8. 8.⚖️ 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 kind of coins (d) the number of coins
9. 9.🧺 Do we need yeast for the ruler lever? (a) needed (b) not needed
10. 10.🧺 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) a round pencil
11. 11.⚖️ 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
12. 12.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) turmeric powder (b) a round pencil (c) a 30 cm ruler (d) a flat table
13. 13.⚖️ 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) True (b) False
14. 14.⚙️ Which of these uses a pulley? (a) a spoon lifting a lid (b) a crane (c) a steering wheel (d) a slide
15. 15.🛟 Why should coins be kept away from very small children? (a) they may swallow them (b) they are magnetic (c) they are too cold (d) they are too shiny
16. 16.True or false: a balloon is needed for the ruler lever. (a) False (b) True
17. 17.⚙️ Which of these is an inclined plane? (a) a bottle opener (b) a slide (c) a spoon lifting a lid (d) a flagpole
18. 18.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a magnet (c) coins of one kind (d) a 30 cm ruler
19. 19.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) a round pencil (c) turmeric powder (d) a 30 cm ruler
20. 20.🧺 Do we need a round pencil for the ruler lever? (a) needed (b) not needed
21. 21.True or false: a steering wheel is an inclined plane. (a) False (b) True
22. 22.🧺 Do we need a 30 cm ruler for the ruler lever? (a) not needed (b) needed
23. 23.True or false: coins of one kind is needed for the ruler lever. (a) False (b) True
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) the same ruler (c) distance from the pencil
25. 25.⚖️ 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
26. 26.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) coins of one kind (c) a magnet (d) a 30 cm ruler
27. 27.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit farther from middle (b) sit on the middle (c) sit closer to middle (d) jump up and down
28. 28.⚙️ Which simple machine is a see-saw? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
29. 29.🛟 What is a safe way to use a ruler as a lever? (a) stand on the ruler (b) flick coins at faces (c) press it gently (d) bend it till it snaps
30. 30.⚖️ 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 measure it (c) we keep it the same
31. 31.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) the same (b) easier (c) impossible (d) harder
32. 32.True or false: a flat table is needed for the ruler lever. (a) True (b) False
33. 33.🧺 Do we need turmeric powder for the ruler lever? (a) needed (b) not needed
34. 34.True or false: a bottle opener is a lever. (a) True (b) False
35. 35.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) coins of one kind (c) a round pencil (d) a battery cell
36. 36.⚖️ A ruler balances on a pencil at its middle. You place 6 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?
37. 37.⚖️ 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 keep it the same (c) we change it
38. 38.⚙️ Which simple machine is a sloping road? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
39. 39.⚙️ Which of these uses a pulley? (a) a flagpole (b) a doorknob (c) a crowbar (d) a spoon lifting a lid
40. 40.True or false: a tap handle is a wheel and axle. (a) False (b) True

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