Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 943 · 40 questions

What you do (Air pushes): 1. Fill a plastic glass right to the top with water. 2. Lay the postcard flat on top, covering the rim. 3. Over a sink or bucket, hold the card and turn the glass upside down. 4. Slowly take your hand away from the card and watch.

1. 1.🧺 Which of these is needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a magnet (c) a balloon (d) a battery cell
2. 2.True or false: a suction hook works by magnetism. (a) True (b) False
3. 3.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the cap is sticky (b) air inside pushes back (c) water is hiding there (d) the bottle is magnetic
4. 4.🔮 Why do we try the card trick over a sink or a bucket? (a) to cool the glass (b) to make it rain (c) to grow plants (d) to catch any spills
5. 5.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “the way we turn it”? (a) we keep it the same (b) we measure it (c) we change it
6. 6.🔍 Which is the odd one out? (a) a fridge magnet (b) a magnetic chess set (c) a suction hook (d) a compass needle
7. 7.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: whether the card stays is kept the same. (a) True (b) False
8. 8.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “whether the card stays”? (a) we change it (b) we measure it (c) we keep it the same
9. 9.True or false: a stiff postcard is needed for the card-on-a-glass trick. (a) False (b) True
10. 10.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a balloon (b) a sink or a bucket (c) a towel (d) a stiff postcard
11. 11.🧺 Do we need yeast for the card-on-a-glass trick? (a) needed (b) not needed
12. 12.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a sink or a bucket (c) a battery cell (d) a stiff postcard
13. 13.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? Which of these is the one thing we change? (a) the same glass (b) whether the card stays (c) how full the glass is (d) the way we turn it
14. 14.🧺 Which of these is needed for the card-on-a-glass trick? (a) a balloon (b) turmeric powder (c) yeast (d) a towel
15. 15.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) turmeric powder (c) a towel (d) a stiff postcard
16. 16.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? Which of these is what we measure? (a) the same glass (b) the way we turn it (c) whether the card stays (d) the same card
17. 17.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: whether the card stays is what we measure. (a) False (b) True
18. 18.True or false: a magnet is needed for the card-on-a-glass trick. (a) False (b) True
19. 19.True or false: a vacuum cleaner works by magnetism. (a) False (b) True
20. 20.🛟 Where should you do the card-and-glass trick? (a) near a plug point (b) on a bed (c) over a sink or bucket (d) over a laptop
21. 21.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) yeast (b) a stiff postcard (c) a sink or a bucket (d) a towel
22. 22.True or false: a stiff postcard is not needed for the card-on-a-glass trick. (a) True (b) False
23. 23.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) not needed (b) needed
24. 24.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the glass breaks (b) the card flies away (c) the card stays on (d) the water turns to ice
25. 25.🥛 Why is it best to fill the glass right to the top? (a) the card gets wet (b) water is heavier (c) little air left inside (d) it looks nicer
26. 26.🥛 Which of these works by air pressure? (a) a compass needle (b) a fridge magnet (c) a magnetic chess set (d) a drinking straw
27. 27.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is heavier (b) it is magnetic (c) it is hotter (d) it will not break
28. 28.🔍 Which is the odd one out? (a) a drinking straw (b) a magnetic chess set (c) a fridge magnet (d) a magnetic pin holder
29. 29.🔮 Predict: you blow up a balloon. What fills it? (a) smoke (b) water (c) sand (d) air
30. 30.True or false: a mirror is not needed for the card-on-a-glass trick. (a) True (b) False
31. 31.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the way we turn it is the one thing we change. (a) False (b) True
32. 32.🔍 Which is the odd one out? (a) a medicine dropper (b) a vacuum cleaner (c) a drinking straw (d) a magnetic chess set
33. 33.True or false: a balloon is not needed for the card-on-a-glass trick. (a) False (b) True
34. 34.True or false: a medicine dropper works by magnetism. (a) True (b) False
35. 35.True or false: a glass of water is needed for the card-on-a-glass trick. (a) True (b) False
36. 36.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same glass is the one thing we change. (a) False (b) True
37. 37.True or false: a compass needle works by air pressure. (a) True (b) False
38. 38.🥛 Which of these works by air pressure? (a) a magnetic pin holder (b) a compass needle (c) a magnetic chess set (d) a medicine dropper
39. 39.True or false: yeast is needed for the card-on-a-glass trick. (a) False (b) True
40. 40.🔍 Which is the odd one out? (a) a bicycle pump (b) a suction hook (c) a drinking straw (d) a magnetic pin holder

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