Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 928 · 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 simple machine is a tap handle? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
2. 2.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: which side goes down is kept the same. (a) False (b) True
3. 3.⚖️ A ruler balances on a pencil at its middle. You place 6 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?
4. 4.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 2 cm to the left of the pencil and 1 coin on the right. How many cm from the pencil must the right-hand coins go to balance it?
5. 5.⚙️ Which simple machine is a bottle opener? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
6. 6.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the lid gets softer (b) the spoon is hot (c) a lever boosts your push (d) the spoon is magnetic
7. 7.🧺 Do we need coins of one kind for the ruler lever? (a) not needed (b) needed
8. 8.🛟 Why should coins be kept away from very small children? (a) they are magnetic (b) they are too cold (c) they are too shiny (d) they may swallow them
9. 9.🧺 Do we need a battery cell for the ruler lever? (a) needed (b) not needed
10. 10.⚙️ Which of these is an inclined plane? (a) a sloping road (b) a well pulley (c) a steering wheel (d) a flagpole
11. 11.🧺 Do we need a flat table for the ruler lever? (a) not needed (b) needed
12. 12.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) a flat table (c) a mirror (d) a magnet
13. 13.🛟 What is a safe way to use a ruler as a lever? (a) bend it till it snaps (b) press it gently (c) stand on the ruler (d) flick coins at faces
14. 14.True or false: a well pulley uses a pulley. (a) False (b) True
15. 15.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit on the middle (b) sit farther from middle (c) jump up and down (d) sit closer to middle
16. 16.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a magnet (c) a flat table (d) a 30 cm ruler
17. 17.🧺 Which of these is not needed for the ruler lever? (a) a magnet (b) a flat table (c) coins of one kind (d) a 30 cm ruler
18. 18.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: distance from the pencil is the one thing we change. (a) False (b) True
19. 19.⚙️ Which of these uses a pulley? (a) a steering wheel (b) a doorknob (c) a spoon lifting a lid (d) a crane
20. 20.True or false: a ramp is an inclined plane. (a) False (b) True
21. 21.True or false: a sloping road is a lever. (a) False (b) True
22. 22.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) a round pencil (c) a balloon (d) a magnet
23. 23.True or false: a magnet is not needed for the ruler lever. (a) False (b) True
24. 24.⚖️ A ruler balances on a pencil at its middle. You place 6 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?
25. 25.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) the same (b) impossible (c) easier (d) harder
26. 26.⚙️ Which of these is an inclined plane? (a) a steering wheel (b) a crane (c) a crowbar (d) a slide
27. 27.⚖️ 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) the number of coins (d) the same ruler
28. 28.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 10 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?
29. 29.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: which side goes down is what we measure. (a) True (b) False
30. 30.⚖️ 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 keep it the same (b) we measure it (c) we change it
31. 31.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 1 cm to the left of the pencil. How many coins must you place 6 cm to the right to balance it?
32. 32.🧺 Do we need a magnet for the ruler lever? (a) not needed (b) needed
33. 33.🧺 Do we need a mirror for the ruler lever? (a) needed (b) not needed
34. 34.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) a magnet (c) yeast (d) coins of one kind
35. 35.True or false: a round pencil is not needed for the ruler lever. (a) True (b) False
36. 36.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a round pencil (c) coins of one kind (d) yeast
37. 37.⚖️ 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) the kind of coins (b) the same ruler (c) the number of coins (d) distance from the pencil
38. 38.🧺 Do we need turmeric powder for the ruler lever? (a) not needed (b) needed
39. 39.🧺 Which of these is needed for the ruler lever? (a) yeast (b) a mirror (c) a battery cell (d) a 30 cm ruler
40. 40.🧺 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 mirror (d) a flat table

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