Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 814 · 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.🧺 Do we need yeast for the ruler lever? (a) not needed (b) needed
2. 2.True or false: a 30 cm ruler is needed for the ruler lever. (a) True (b) False
3. 3.⚖️ 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 change it (c) we keep it the same
4. 4.True or false: yeast is needed for the ruler lever. (a) False (b) True
5. 5.True or false: a magnet is not needed for the ruler lever. (a) False (b) True
6. 6.⚖️ 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 change it (b) we measure it (c) we keep it the same
7. 7.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is what we measure? (a) which side goes down (b) the kind of coins (c) where the pencil is (d) distance from the pencil
8. 8.True or false: a doorknob is an inclined plane. (a) True (b) False
9. 9.🧺 Do we need a battery cell for the ruler lever? (a) needed (b) not needed
10. 10.🧺 Do we need a 30 cm ruler for the ruler lever? (a) needed (b) not needed
11. 11.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) a magnet (c) a round pencil (d) a flat table
12. 12.⚙️ Which of these is an inclined plane? (a) a steering wheel (b) a tap handle (c) a slide (d) a doorknob
13. 13.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a flat table (c) coins of one kind (d) yeast
14. 14.True or false: a spoon lifting a lid is a lever. (a) False (b) True
15. 15.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 6 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.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) easier (b) harder (c) impossible (d) the same
17. 17.⚖️ A ruler balances on a pencil at its middle. You place 5 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?
18. 18.True or false: a crowbar is a wheel and axle. (a) False (b) True
19. 19.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a 30 cm ruler (c) a round pencil (d) turmeric powder
20. 20.⚖️ A ruler balances on a pencil at its middle. You place 4 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?
21. 21.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a mirror (b) coins of one kind (c) a round pencil (d) a flat table
22. 22.⚖️ 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
23. 23.⚙️ Which of these is an inclined plane? (a) a bottle opener (b) a sloping road (c) a see-saw (d) a doorknob
24. 24.⚖️ Coins on the two sides balance when coins × distance is ___. (a) always 10 (b) equal on both sides (c) bigger on the left (d) zero
25. 25.⚙️ Which simple machine is a crane? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
26. 26.⚖️ 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
27. 27.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: which side goes down is the one thing we change. (a) False (b) True
28. 28.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 5 cm to the left of the pencil. How many coins must you place 5 cm to the right to balance it?
29. 29.True or false: turmeric powder is needed for the ruler lever. (a) True (b) False
30. 30.⚙️ Which simple machine is a steering wheel? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
31. 31.True or false: coins of one kind is not needed for the ruler lever. (a) True (b) False
32. 32.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit closer to middle (b) jump up and down (c) sit on the middle (d) sit farther from middle
33. 33.True or false: a bottle opener is a lever. (a) True (b) False
34. 34.🧺 Do we need turmeric powder for the ruler lever? (a) needed (b) not needed
35. 35.🧺 Do we need a round pencil for the ruler lever? (a) not needed (b) needed
36. 36.⚙️ Which simple machine is a bottle opener? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
37. 37.⚖️ 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) False (b) True
38. 38.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 2 cm to the left of the pencil. How many coins must you place 8 cm to the right to balance it?
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) where the pencil is (b) which side goes down (c) distance from the pencil
40. 40.🛟 What is a safe way to use a ruler as a lever? (a) flick coins at faces (b) bend it till it snaps (c) press it gently (d) stand on the ruler

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