Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 270 · 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.📘 Air presses on everything around us. What is this push called? (a) friction (b) magnetism (c) sunlight (d) air pressure
2. 2.True or false: a glass of water is not needed for the card-on-a-glass trick. (a) False (b) True
3. 3.⚖️ 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 measure it (b) we change it (c) we keep it the same
4. 4.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is hotter (b) it will not break (c) it is magnetic (d) it is heavier
5. 5.🥛 Which of these works by air pressure? (a) a suction hook (b) a fridge magnet (c) a magnetic pin holder (d) a compass needle
6. 6.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a towel (c) a balloon (d) a stiff postcard
7. 7.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) a sink or a bucket (c) a mirror (d) a stiff postcard
8. 8.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same card is kept the same. (a) False (b) True
9. 9.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the glass breaks (b) the water turns to ice (c) the card stays on (d) the card flies away
10. 10.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a towel (b) a sink or a bucket (c) yeast (d) a stiff postcard
11. 11.🥛 Which of these works by magnetism? (a) a bicycle pump (b) a medicine dropper (c) a fridge magnet (d) a vacuum cleaner
12. 12.⚖️ 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) whether the card stays (c) the way we turn it (d) the same card
13. 13.True or false: yeast is needed for the card-on-a-glass trick. (a) True (b) False
14. 14.🔍 Which is the odd one out? (a) a fridge magnet (b) a medicine dropper (c) a drinking straw (d) a suction hook
15. 15.🧺 Do we need a towel for the card-on-a-glass trick? (a) not needed (b) needed
16. 16.⚖️ 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) how full the glass is (b) the way we turn it (c) whether the card stays
17. 17.🥤 Why does juice go up a drinking straw when you sip? (a) the straw is hot (b) juice likes plastic (c) air pushes it up (d) the straw is magnetic
18. 18.🧺 Do we need a mirror for the card-on-a-glass trick? (a) not needed (b) needed
19. 19.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) air inside pushes back (b) the cap is sticky (c) water is hiding there (d) the bottle is magnetic
20. 20.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) not needed (b) needed
21. 21.🛟 Where should you do the card-and-glass trick? (a) near a plug point (b) over a laptop (c) over a sink or bucket (d) on a bed
22. 22.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) needed (b) not needed
23. 23.🔍 Which is the odd one out? (a) a magnetic chess set (b) a bicycle pump (c) a vacuum cleaner (d) a drinking straw
24. 24.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a magnet (c) a sink or a bucket (d) a stiff postcard
25. 25.True or false: a balloon is not needed for the card-on-a-glass trick. (a) True (b) False
26. 26.🥛 Does a suction hook work by air pressure or by magnetism? (a) magnetism (b) air pressure
27. 27.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a stiff postcard (b) a glass of water (c) a sink or a bucket (d) a magnet
28. 28.🥛 Why is it best to fill the glass right to the top? (a) little air left inside (b) the card gets wet (c) it looks nicer (d) water is heavier
29. 29.🧺 Which of these is needed for the card-on-a-glass trick? (a) a magnet (b) a mirror (c) a glass of water (d) turmeric powder
30. 30.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) turmeric powder (c) a stiff postcard (d) a sink or a bucket
31. 31.🥛 Which of these works by magnetism? (a) a drinking straw (b) a magnetic chess set (c) a vacuum cleaner (d) a suction hook
32. 32.🧺 Do we need a battery cell for the card-on-a-glass trick? (a) needed (b) not needed
33. 33.True or false: a drinking straw works by magnetism. (a) True (b) False
34. 34.🧺 Do we need a magnet for the card-on-a-glass trick? (a) needed (b) not needed
35. 35.True or false: a bicycle pump works by magnetism. (a) True (b) False
36. 36.🔮 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
37. 37.🥛 Does a vacuum cleaner work by air pressure or by magnetism? (a) magnetism (b) air pressure
38. 38.⚖️ 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 keep it the same (b) we measure it (c) we change it
39. 39.🔮 Predict: you blow up a balloon. What fills it? (a) water (b) sand (c) smoke (d) air
40. 40.🧺 Which of these is needed for the card-on-a-glass trick? (a) a battery cell (b) a sink or a bucket (c) a magnet (d) a balloon

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