Air Pressure Experiment Worksheet

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

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