Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 734 · 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.🛟 Why should coins be kept away from very small children? (a) they may swallow them (b) they are too cold (c) they are too shiny (d) they are magnetic
2. 2.🧺 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 flat table (d) a magnet
3. 3.⚙️ Which simple machine is a doorknob? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
4. 4.True or false: a balloon is needed for the ruler lever. (a) False (b) True
5. 5.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) yeast (c) a flat table (d) a balloon
6. 6.🛟 What is a safe way to use a ruler as a lever? (a) flick coins at faces (b) bend it till it snaps (c) stand on the ruler (d) press it gently
7. 7.True or false: a ramp is an inclined plane. (a) True (b) False
8. 8.⚖️ 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
9. 9.⚙️ Which simple machine is a well pulley? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
10. 10.True or false: turmeric powder is not needed for the ruler lever. (a) False (b) True
11. 11.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) easier (b) impossible (c) harder (d) the same
12. 12.⚙️ Which of these is an inclined plane? (a) a doorknob (b) a slide (c) a flagpole (d) a crane
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 the one thing we change. (a) True (b) False
14. 14.⚖️ 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) False (b) True
15. 15.True or false: yeast is needed for the ruler lever. (a) False (b) True
16. 16.🧺 Do we need yeast for the ruler lever? (a) not needed (b) needed
17. 17.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) a round pencil (c) yeast (d) coins of one kind
18. 18.⚙️ Which of these is a lever? (a) a flagpole (b) a slide (c) a doorknob (d) a bottle opener
19. 19.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a 30 cm ruler (c) a magnet (d) a flat table
20. 20.⚖️ Coins on the two sides balance when coins × distance is ___. (a) zero (b) always 10 (c) equal on both sides (d) bigger on the left
21. 21.⚖️ What is the turning point of a lever called? (a) the effort (b) the load (c) the fulcrum (d) the axle
22. 22.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) turmeric powder (c) a battery cell (d) a round pencil
23. 23.⚙️ Which of these uses a pulley? (a) a crowbar (b) a sloping road (c) a tap handle (d) a crane
24. 24.True or false: coins of one kind is not needed for the ruler lever. (a) True (b) False
25. 25.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a 30 cm ruler (c) turmeric powder (d) a round pencil
26. 26.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the number of coins is the one thing we change. (a) True (b) False
27. 27.⚖️ 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 kind of coins (b) distance from the pencil (c) which side goes down (d) where the pencil is
28. 28.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) coins of one kind (c) a 30 cm ruler (d) a balloon
29. 29.🧺 Do we need a balloon for the ruler lever? (a) needed (b) not needed
30. 30.⚖️ 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) False (b) True
31. 31.🧺 Do we need a round pencil for the ruler lever? (a) needed (b) not needed
32. 32.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a round pencil (c) coins of one kind (d) yeast
33. 33.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the kind of coins is what we measure. (a) True (b) False
34. 34.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 1 cm to the left of the pencil. How many coins must you place 3 cm to the right to balance it?
35. 35.🔮 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) the left side (c) neither, it balances (d) the right side
36. 36.⚖️ 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) True (b) False
37. 37.True or false: a flat table is not needed for the ruler lever. (a) True (b) False
38. 38.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) the kind of coins (b) distance from the pencil (c) which side goes down
39. 39.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 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?
40. 40.⚙️ Which simple machine is a crowbar? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane

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