Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 553 · 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.⚖️ What is the turning point of a lever called? (a) the load (b) the axle (c) the effort (d) the fulcrum
2. 2.🛟 What is a safe way to use a ruler as a lever? (a) press it gently (b) stand on the ruler (c) bend it till it snaps (d) flick coins at faces
3. 3.🧺 Do we need a flat table for the ruler lever? (a) needed (b) not needed
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) distance from the pencil (b) the number of coins (c) the kind of coins (d) which side goes down
5. 5.🧺 Which of these is needed for the ruler lever? (a) a 30 cm ruler (b) yeast (c) a battery cell (d) a magnet
6. 6.True or false: a battery cell is not needed for the ruler lever. (a) False (b) True
7. 7.🧺 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) a mirror
8. 8.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) easier (b) impossible (c) the same (d) harder
9. 9.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a magnet (c) a round pencil (d) a flat table
10. 10.⚖️ 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 number of coins (b) which side goes down (c) distance from the pencil
11. 11.🧺 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 30 cm ruler (d) a magnet
12. 12.🔮 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 right side (c) neither, it balances (d) the left side
13. 13.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? What do we do with “the kind of coins”? (a) we measure it (b) we keep it the same (c) we change it
14. 14.🧺 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 battery cell (d) a flat table
15. 15.⚙️ Which of these is a lever? (a) a well pulley (b) a tap handle (c) a see-saw (d) a steering wheel
16. 16.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) turmeric powder (c) a round pencil (d) a flat table
17. 17.True or false: a ramp is an inclined plane. (a) False (b) True
18. 18.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the same ruler is kept the same. (a) False (b) True
19. 19.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 6 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?
20. 20.True or false: a balloon is not needed for the ruler lever. (a) False (b) True
21. 21.True or false: a magnet is needed for the ruler lever. (a) True (b) False
22. 22.⚖️ 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) distance from the pencil (c) where the pencil is (d) the number of coins
23. 23.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? What do we do with “the same ruler”? (a) we change it (b) we measure it (c) we keep it the same
24. 24.🛟 Why should coins be kept away from very small children? (a) they are too cold (b) they may swallow them (c) they are magnetic (d) they are too shiny
25. 25.True or false: a see-saw uses a pulley. (a) True (b) False
26. 26.⚙️ Which of these uses a pulley? (a) a slide (b) a doorknob (c) a bottle opener (d) a well pulley
27. 27.⚖️ Coins on the two sides balance when coins × distance is ___. (a) bigger on the left (b) always 10 (c) equal on both sides (d) zero
28. 28.True or false: a flat table is not needed for the ruler lever. (a) False (b) True
29. 29.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) a flat table (c) turmeric powder (d) a round pencil
30. 30.⚙️ Which of these is a wheel and axle? (a) a crowbar (b) a spoon lifting a lid (c) a tap handle (d) a bottle opener
31. 31.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: where the pencil is is the one thing we change. (a) False (b) True
32. 32.True or false: a doorknob is a wheel and axle. (a) False (b) True
33. 33.True or false: yeast is needed for the ruler lever. (a) True (b) False
34. 34.⚖️ 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 closer to middle (d) sit on the middle
35. 35.⚖️ 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) False (b) True
36. 36.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 5 cm to the left of the pencil. How many coins must you place 3 cm to the right to balance it?
37. 37.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 10 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?
38. 38.🧺 Do we need turmeric powder for the ruler lever? (a) not needed (b) needed
39. 39.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the spoon is magnetic (b) the lid gets softer (c) the spoon is hot (d) a lever boosts your push
40. 40.⚙️ Which simple machine is a bottle opener? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle

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