Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 369 · 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.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a stiff postcard (c) a mirror (d) a sink or a bucket
2. 2.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is hotter (b) it is magnetic (c) it is heavier (d) it will not break
3. 3.True or false: yeast is needed for the card-on-a-glass trick. (a) True (b) False
4. 4.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a stiff postcard (c) a towel (d) a balloon
5. 5.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: how full the glass is is kept the same. (a) False (b) True
6. 6.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: how full the glass is is the one thing we change. (a) True (b) False
7. 7.True or false: turmeric powder is needed for the card-on-a-glass trick. (a) False (b) True
8. 8.True or false: a drinking straw works by air pressure. (a) False (b) True
9. 9.🔍 Which is the odd one out? (a) a bicycle pump (b) a suction hook (c) a medicine dropper (d) a fridge magnet
10. 10.🔮 Predict: you blow up a balloon. What fills it? (a) water (b) smoke (c) sand (d) air
11. 11.True or false: yeast is not needed for the card-on-a-glass trick. (a) False (b) True
12. 12.🔍 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 water turns to ice (d) the card stays on
13. 13.True or false: a bicycle pump works by air pressure. (a) False (b) True
14. 14.True or false: a glass of water is needed for the card-on-a-glass trick. (a) True (b) False
15. 15.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a sink or a bucket (b) yeast (c) a stiff postcard (d) a glass of water
16. 16.🥛 Does a drinking straw work by air pressure or by magnetism? (a) air pressure (b) magnetism
17. 17.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) needed (b) not needed
18. 18.True or false: a towel is needed for the card-on-a-glass trick. (a) True (b) False
19. 19.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a towel (b) a sink or a bucket (c) a glass of water (d) a mirror
20. 20.⚖️ 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 kept the same. (a) False (b) True
21. 21.True or false: a mirror is needed for the card-on-a-glass trick. (a) False (b) True
22. 22.🧺 Do we need a balloon for the card-on-a-glass trick? (a) not needed (b) needed
23. 23.🥛 Which of these works by air pressure? (a) a magnetic pin holder (b) a compass needle (c) a fridge magnet (d) a suction hook
24. 24.🛟 Where should you do the card-and-glass trick? (a) near a plug point (b) over a sink or bucket (c) on a bed (d) over a laptop
25. 25.🔍 Which is the odd one out? (a) a compass needle (b) a magnetic chess set (c) a fridge magnet (d) a medicine dropper
26. 26.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) needed (b) not needed
27. 27.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? Which of these is kept the same? (a) whether the card stays (b) how full the glass is (c) the way we turn it
28. 28.🥛 Does a fridge magnet work by air pressure or by magnetism? (a) air pressure (b) magnetism
29. 29.🥛 Why is it best to fill the glass right to the top? (a) it looks nicer (b) little air left inside (c) water is heavier (d) the card gets wet
30. 30.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a towel (b) turmeric powder (c) a stiff postcard (d) a sink or a bucket
31. 31.🧺 Do we need a towel for the card-on-a-glass trick? (a) needed (b) not needed
32. 32.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the cap is sticky (b) water is hiding there (c) air inside pushes back (d) the bottle is magnetic
33. 33.🔍 Which is the odd one out? (a) a bicycle pump (b) a fridge magnet (c) a magnetic chess set (d) a compass needle
34. 34.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a compass needle (c) a medicine dropper (d) a magnetic chess set
35. 35.🧺 Do we need a magnet for the card-on-a-glass trick? (a) needed (b) not needed
36. 36.🧺 Which of these is needed for the card-on-a-glass trick? (a) a towel (b) a balloon (c) a magnet (d) a battery cell
37. 37.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “the same glass”? (a) we keep it the same (b) we change it (c) we measure it
38. 38.⚖️ 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 keep it the same (c) we measure it
39. 39.⚖️ 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) the same card (c) whether the card stays (d) how full the glass is
40. 40.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “the same card”? (a) we change it (b) we measure it (c) we keep it the same

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