Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 409 · 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 of these is an inclined plane? (a) a sloping road (b) a see-saw (c) a well pulley (d) a crane
2. 2.🧺 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 round pencil (d) a mirror
3. 3.⚖️ Coins on the two sides balance when coins × distance is ___. (a) equal on both sides (b) always 10 (c) zero (d) bigger on the left
4. 4.⚖️ 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) which side goes down (b) where the pencil is (c) the same ruler (d) distance from the pencil
5. 5.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) a flat table (c) a mirror (d) coins of one kind
6. 6.🧺 Do we need a 30 cm ruler for the ruler lever? (a) needed (b) not needed
7. 7.⚖️ 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 change it (b) we keep it the same (c) we measure it
8. 8.⚖️ 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 measure it (c) we change it
9. 9.🔮 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
10. 10.⚙️ Which simple machine is a tap handle? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
11. 11.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) turmeric powder (b) a flat table (c) a 30 cm ruler (d) a round pencil
12. 12.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) yeast (b) a flat table (c) coins of one kind (d) a 30 cm ruler
13. 13.🧺 Do we need yeast for the ruler lever? (a) not needed (b) needed
14. 14.⚙️ Which simple machine is a see-saw? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
15. 15.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 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?
16. 16.🧺 Do we need coins of one kind for the ruler lever? (a) not needed (b) needed
17. 17.⚙️ Which simple machine is a spoon lifting a lid? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
18. 18.⚖️ 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 number of coins (b) which side goes down (c) the same ruler (d) distance from the pencil
19. 19.⚖️ 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
20. 20.⚖️ What is the turning point of a lever called? (a) the fulcrum (b) the load (c) the axle (d) the effort
21. 21.⚖️ 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
22. 22.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 8 cm to the left of the pencil. How many coins must you place 10 cm to the right to balance it?
23. 23.⚙️ Which of these is an inclined plane? (a) a bottle opener (b) a slide (c) a spoon lifting a lid (d) a see-saw
24. 24.⚖️ 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
25. 25.🛟 Why should coins be kept away from very small children? (a) they are too shiny (b) they are magnetic (c) they may swallow them (d) they are too cold
26. 26.🧺 Do we need a round pencil for the ruler lever? (a) needed (b) not needed
27. 27.⚖️ A ruler balances on a pencil at its middle. You place 4 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?
28. 28.🧺 Do we need a balloon for the ruler lever? (a) not needed (b) needed
29. 29.True or false: a balloon is needed for the ruler lever. (a) True (b) False
30. 30.⚖️ 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) True (b) False
31. 31.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) coins of one kind (c) a magnet (d) yeast
32. 32.⚙️ Which simple machine is a bottle opener? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
33. 33.🧺 Which of these is needed for the ruler lever? (a) a round pencil (b) yeast (c) a battery cell (d) a magnet
34. 34.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 1 cm to the left of the pencil. How many coins must you place 4 cm to the right to balance it?
35. 35.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: where the pencil is is kept the same. (a) False (b) True
36. 36.🧺 Do we need a mirror for the ruler lever? (a) needed (b) not needed
37. 37.⚙️ Which of these is a lever? (a) a slide (b) a flagpole (c) a crowbar (d) a tap handle
38. 38.True or false: a flat table is needed for the ruler lever. (a) True (b) False
39. 39.⚖️ 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
40. 40.🧺 Do we need turmeric powder for the ruler lever? (a) not needed (b) needed

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