Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 491 · 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.🛟 Why should coins be kept away from very small children? (a) they are magnetic (b) they may swallow them (c) they are too cold (d) they are too shiny
2. 2.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) distance from the pencil (b) which side goes down (c) the same ruler
3. 3.True or false: a slide is an inclined plane. (a) True (b) False
4. 4.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the spoon is magnetic (b) the spoon is hot (c) the lid gets softer (d) a lever boosts your push
5. 5.⚙️ Which simple machine is a crowbar? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
6. 6.⚖️ 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 change it (b) we keep it the same (c) we measure it
7. 7.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a mirror (c) a flat table (d) a 30 cm ruler
8. 8.🧺 Do we need coins of one kind for the ruler lever? (a) not needed (b) needed
9. 9.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a magnet (c) a 30 cm ruler (d) a flat table
10. 10.🧺 Do we need a magnet for the ruler lever? (a) not needed (b) needed
11. 11.⚖️ 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) where the pencil is (c) the kind of coins (d) which side goes down
12. 12.⚙️ Which of these uses a pulley? (a) a bottle opener (b) a flagpole (c) a spoon lifting a lid (d) a ramp
13. 13.⚖️ 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
14. 14.⚙️ Which of these is a wheel and axle? (a) a see-saw (b) a flagpole (c) a bottle opener (d) a steering wheel
15. 15.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: distance from the pencil is what we measure. (a) False (b) True
16. 16.True or false: a steering wheel is a wheel and axle. (a) False (b) True
17. 17.⚖️ 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) distance from the pencil (c) which side goes down
18. 18.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 4 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?
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 battery cell (d) a flat table
20. 20.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a flat table (c) a 30 cm ruler (d) yeast
21. 21.⚖️ 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 change it (c) we measure it
22. 22.🧺 Do we need a balloon for the ruler lever? (a) needed (b) not needed
23. 23.🔮 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 right side (b) the left side (c) neither, it balances (d) both go up
24. 24.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) a balloon (c) yeast (d) coins of one kind
25. 25.True or false: a crane uses a pulley. (a) True (b) False
26. 26.⚙️ Which of these is a lever? (a) a see-saw (b) a doorknob (c) a ramp (d) a slide
27. 27.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) a 30 cm ruler (c) a balloon (d) a mirror
28. 28.⚖️ 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) where the pencil is (c) distance from the pencil (d) the number of coins
29. 29.⚙️ Which simple machine is a tap handle? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
30. 30.⚙️ Which of these is an inclined plane? (a) a tap handle (b) a sloping road (c) a crowbar (d) a see-saw
31. 31.True or false: a flagpole is an inclined plane. (a) False (b) True
32. 32.🧺 Which of these is needed for the ruler lever? (a) a battery cell (b) a flat table (c) a balloon (d) yeast
33. 33.⚖️ What is the turning point of a lever called? (a) the fulcrum (b) the load (c) the axle (d) the effort
34. 34.🛟 What is a safe way to use a ruler as a lever? (a) flick coins at faces (b) stand on the ruler (c) press it gently (d) bend it till it snaps
35. 35.⚖️ Coins on the two sides balance when coins × distance is ___. (a) bigger on the left (b) equal on both sides (c) always 10 (d) zero
36. 36.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a 30 cm ruler (c) a magnet (d) a flat table
37. 37.⚙️ Which simple machine is a see-saw? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
38. 38.True or false: a flat table is not needed for the ruler lever. (a) False (b) True
39. 39.True or false: a doorknob is a wheel and axle. (a) True (b) False
40. 40.⚖️ 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?

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