Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 83 · 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 simple machine is a bottle opener? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
2. 2.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a 30 cm ruler (c) a magnet (d) a flat table
3. 3.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 6 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?
4. 4.⚖️ 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
5. 5.⚙️ Which of these uses a pulley? (a) a slide (b) a steering wheel (c) a flagpole (d) a doorknob
6. 6.True or false: a crane is a lever. (a) True (b) False
7. 7.🔮 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) the right side (d) neither, it balances
8. 8.True or false: a steering wheel is a wheel and axle. (a) True (b) False
9. 9.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a round pencil (c) a flat table (d) turmeric powder
10. 10.⚙️ Which simple machine is a spoon lifting a lid? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
11. 11.True or false: a round pencil is not needed for the ruler lever. (a) False (b) True
12. 12.True or false: a round pencil is needed for the ruler lever. (a) True (b) False
13. 13.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a magnet (c) a round pencil (d) a flat table
14. 14.True or false: a spoon lifting a lid is a lever. (a) False (b) True
15. 15.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) the same (b) easier (c) harder (d) impossible
16. 16.⚙️ Which simple machine is a crane? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
17. 17.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: which side goes down is what we measure. (a) False (b) True
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) distance from the pencil (b) where the pencil is (c) the same ruler (d) the kind of coins
19. 19.🧺 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) yeast
20. 20.🧺 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 balloon
21. 21.🧺 Do we need a 30 cm ruler for the ruler lever? (a) not needed (b) needed
22. 22.🛟 What is a safe way to use a ruler as a lever? (a) bend it till it snaps (b) stand on the ruler (c) flick coins at faces (d) press it gently
23. 23.⚖️ 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) True (b) False
24. 24.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 6 cm to the left of the pencil. How many coins must you place 6 cm to the right to balance it?
25. 25.🧺 Do we need a mirror for the ruler lever? (a) not needed (b) needed
26. 26.🧺 Which of these is needed for the ruler lever? (a) coins of one kind (b) a mirror (c) a battery cell (d) yeast
27. 27.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a balloon (b) coins of one kind (c) a flat table (d) a 30 cm ruler
28. 28.🛟 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
29. 29.🧺 Which of these is needed for the ruler lever? (a) a battery cell (b) yeast (c) a mirror (d) a 30 cm ruler
30. 30.⚖️ 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) where the pencil is (c) which side goes down
31. 31.⚖️ 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
32. 32.True or false: coins of one kind is not needed for the ruler lever. (a) True (b) False
33. 33.⚙️ Which of these uses a pulley? (a) a spoon lifting a lid (b) a bottle opener (c) a steering wheel (d) a well pulley
34. 34.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: distance from the pencil is what we measure. (a) True (b) False
35. 35.True or false: a mirror is needed for the ruler lever. (a) False (b) True
36. 36.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is what we measure? (a) the same ruler (b) the number of coins (c) the kind of coins (d) which side goes down
37. 37.⚖️ 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
38. 38.⚖️ 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?
39. 39.🧺 Do we need coins of one kind for the ruler lever? (a) not needed (b) needed
40. 40.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the same ruler is the one thing we change. (a) True (b) False

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