Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 196 · 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.True or false: coins of one kind is needed for the ruler lever. (a) True (b) False
2. 2.⚖️ 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
3. 3.⚙️ Which of these is an inclined plane? (a) a flagpole (b) a bottle opener (c) a sloping road (d) a steering wheel
4. 4.⚙️ Which simple machine is a flagpole? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
5. 5.⚖️ Coins on the two sides balance when coins × distance is ___. (a) always 10 (b) equal on both sides (c) zero (d) bigger on the left
6. 6.⚖️ 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
7. 7.True or false: turmeric powder is needed for the ruler lever. (a) False (b) True
8. 8.🛟 What is a safe way to use a ruler as a lever? (a) stand on the ruler (b) press it gently (c) bend it till it snaps (d) flick coins at faces
9. 9.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) a round pencil (c) yeast (d) a battery cell
10. 10.🧺 Which of these is needed for the ruler lever? (a) a flat table (b) a mirror (c) yeast (d) a balloon
11. 11.True or false: a crane is a wheel and axle. (a) True (b) False
12. 12.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a flat table (c) a balloon (d) a 30 cm ruler
13. 13.⚙️ Which of these is an inclined plane? (a) a flagpole (b) a see-saw (c) a steering wheel (d) a slide
14. 14.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the number of coins is what we measure. (a) False (b) True
15. 15.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 5 cm to the left of the pencil and 5 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
16. 16.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) a lever boosts your push (b) the lid gets softer (c) the spoon is hot (d) the spoon is magnetic
17. 17.⚙️ Which of these is a wheel and axle? (a) a crane (b) a spoon lifting a lid (c) a tap handle (d) a ramp
18. 18.⚖️ 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
19. 19.True or false: a bottle opener is an inclined plane. (a) True (b) False
20. 20.⚖️ 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 keep it the same (b) we change it (c) we measure it
21. 21.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 6 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?
22. 22.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) impossible (b) the same (c) easier (d) harder
23. 23.🛟 Why should coins be kept away from very small children? (a) they are magnetic (b) they may swallow them (c) they are too shiny (d) they are too cold
24. 24.True or false: a tap handle is a lever. (a) True (b) False
25. 25.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a round pencil (c) a magnet (d) a flat table
26. 26.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) turmeric powder (c) a mirror (d) a 30 cm ruler
27. 27.True or false: a crowbar is a wheel and axle. (a) False (b) True
28. 28.🧺 Do we need a magnet for the ruler lever? (a) not needed (b) needed
29. 29.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit farther from middle (b) jump up and down (c) sit on the middle (d) sit closer to middle
30. 30.🧺 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 flat table (d) turmeric powder
31. 31.True or false: yeast is needed for the ruler lever. (a) True (b) False
32. 32.⚙️ Which simple machine is a bottle opener? (a) a wheel and axle (b) an inclined plane (c) a pulley (d) a lever
33. 33.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 3 cm to the left of the pencil. How many coins must you place 1 cm to the right to balance it?
34. 34.🔮 Predict: 2 coins sit 5 cm left of the pencil and 2 coins sit 10 cm right of it. Which side goes down? (a) both go up (b) neither, it balances (c) the left side (d) the right side
35. 35.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a flat table (c) a 30 cm ruler (d) a mirror
36. 36.True or false: a battery cell is needed for the ruler lever. (a) True (b) False
37. 37.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) yeast (b) coins of one kind (c) a flat table (d) a round pencil
38. 38.🧺 Do we need turmeric powder for the ruler lever? (a) needed (b) not needed
39. 39.True or false: a battery cell is not needed for the ruler lever. (a) False (b) True
40. 40.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a mirror (b) a 30 cm ruler (c) a round pencil (d) coins of one kind

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