Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 802 · 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 round pencil (c) turmeric powder (d) a 30 cm ruler
2. 2.⚖️ 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) which side goes down (c) the same ruler (d) where the pencil is
3. 3.⚙️ Which simple machine is a tap handle? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
4. 4.True or false: a balloon is not needed for the ruler lever. (a) True (b) False
5. 5.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) coins of one kind (c) a mirror (d) a flat table
6. 6.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is what we measure? (a) distance from the pencil (b) which side goes down (c) where the pencil is (d) the kind of coins
7. 7.⚙️ Which simple machine is a bottle opener? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
8. 8.⚖️ 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
9. 9.True or false: a bottle opener is a lever. (a) True (b) False
10. 10.🔮 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) neither, it balances (c) the right side (d) both go up
11. 11.⚙️ Which of these is a wheel and axle? (a) a spoon lifting a lid (b) a well pulley (c) a steering wheel (d) a bottle opener
12. 12.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 2 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?
13. 13.⚙️ Which simple machine is a see-saw? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
14. 14.True or false: a flagpole uses a pulley. (a) True (b) False
15. 15.⚙️ Which simple machine is a flagpole? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
16. 16.True or false: a magnet is not needed for the ruler lever. (a) False (b) True
17. 17.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 4 cm to the left of the pencil. How many coins must you place 5 cm to the right to balance it?
18. 18.⚙️ Which simple machine is a spoon lifting a lid? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
19. 19.⚙️ Which simple machine is a sloping road? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
20. 20.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 6 cm to the left of the pencil. How many coins must you place 3 cm to the right to balance it?
21. 21.⚙️ Which of these is a lever? (a) a crane (b) a steering wheel (c) a see-saw (d) a doorknob
22. 22.🧺 Do we need a 30 cm ruler for the ruler lever? (a) needed (b) not needed
23. 23.⚙️ Which simple machine is a well pulley? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
24. 24.⚖️ What is the turning point of a lever called? (a) the effort (b) the load (c) the fulcrum (d) the axle
25. 25.⚖️ 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
26. 26.True or false: a slide is an inclined plane. (a) False (b) True
27. 27.🛟 Why should coins be kept away from very small children? (a) they are too cold (b) they may swallow them (c) they are too shiny (d) they are magnetic
28. 28.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) coins of one kind (c) a battery cell (d) a 30 cm ruler
29. 29.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) coins of one kind (c) a 30 cm ruler (d) a balloon
30. 30.🧺 Do we need a magnet for the ruler lever? (a) needed (b) not needed
31. 31.⚖️ 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 keep it the same (b) we measure it (c) we change it
32. 32.⚙️ Which of these is a wheel and axle? (a) a ramp (b) a well pulley (c) a tap handle (d) a crane
33. 33.⚖️ 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 measure it (b) we keep it the same (c) we change it
34. 34.⚖️ 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
35. 35.🧺 Do we need a round pencil for the ruler lever? (a) not needed (b) needed
36. 36.True or false: coins of one kind is needed for the ruler lever. (a) True (b) False
37. 37.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) a lever boosts your push (b) the spoon is magnetic (c) the spoon is hot (d) the lid gets softer
38. 38.⚖️ 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
39. 39.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) impossible (b) harder (c) the same (d) easier
40. 40.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 8 cm to the left of the pencil and 4 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?

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