Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 213 · 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 a mirror for the ruler lever? (a) needed (b) not needed
2. 2.🧺 Do we need yeast for the ruler lever? (a) needed (b) not needed
3. 3.⚖️ 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) where the pencil is (b) the same ruler (c) distance from the pencil (d) the number of coins
4. 4.🧺 Do we need a round pencil for the ruler lever? (a) needed (b) not needed
5. 5.🧺 Do we need a magnet for the ruler lever? (a) not needed (b) needed
6. 6.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) yeast (b) a round pencil (c) coins of one kind (d) a 30 cm ruler
7. 7.🧺 Which of these is needed for the ruler lever? (a) a 30 cm ruler (b) a mirror (c) yeast (d) a battery cell
8. 8.⚖️ 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) False (b) True
9. 9.⚖️ What is the turning point of a lever called? (a) the fulcrum (b) the effort (c) the load (d) the axle
10. 10.🛟 Why should coins be kept away from very small children? (a) they are magnetic (b) they are too shiny (c) they may swallow them (d) they are too cold
11. 11.⚖️ 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) True (b) False
12. 12.True or false: a spoon lifting a lid is a lever. (a) True (b) False
13. 13.⚖️ 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
14. 14.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a round pencil (c) a mirror (d) coins of one kind
15. 15.⚙️ Which of these is an inclined plane? (a) a crane (b) a bottle opener (c) a see-saw (d) a ramp
16. 16.⚖️ Coins on the two sides balance when coins × distance is ___. (a) bigger on the left (b) equal on both sides (c) zero (d) always 10
17. 17.🔮 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) both go up (d) the right side
18. 18.⚙️ Which of these is a wheel and axle? (a) a sloping road (b) a bottle opener (c) a spoon lifting a lid (d) a steering wheel
19. 19.⚙️ Which simple machine is a spoon lifting a lid? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
20. 20.⚙️ Which simple machine is a crane? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
21. 21.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) impossible (b) the same (c) easier (d) harder
22. 22.True or false: a well pulley is a lever. (a) False (b) True
23. 23.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) turmeric powder (c) a round pencil (d) a magnet
24. 24.True or false: a steering wheel is an inclined plane. (a) True (b) False
25. 25.🛟 What is a safe way to use a ruler as a lever? (a) stand on the ruler (b) bend it till it snaps (c) flick coins at faces (d) press it gently
26. 26.🧺 Which of these is not needed for the ruler lever? (a) turmeric powder (b) a 30 cm ruler (c) a round pencil (d) a flat table
27. 27.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a round pencil (c) a 30 cm ruler (d) yeast
28. 28.⚖️ 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
29. 29.True or false: a crane uses a pulley. (a) False (b) True
30. 30.True or false: a flat table is not needed for the ruler lever. (a) True (b) False
31. 31.⚖️ 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 kind of coins (b) the number of coins (c) which side goes down (d) the same ruler
32. 32.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 5 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?
33. 33.⚙️ Which of these uses a pulley? (a) a crane (b) a see-saw (c) a bottle opener (d) a doorknob
34. 34.True or false: a magnet is needed for the ruler lever. (a) False (b) True
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) True (b) False
36. 36.⚙️ Which simple machine is a see-saw? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
37. 37.🧺 Which of these is needed for the ruler lever? (a) a battery cell (b) a mirror (c) turmeric powder (d) coins of one kind
38. 38.True or false: a battery cell is needed for the ruler lever. (a) True (b) False
39. 39.⚙️ Which of these is a lever? (a) a crane (b) a ramp (c) a crowbar (d) a flagpole
40. 40.True or false: a see-saw is a lever. (a) False (b) True

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