Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 560 · 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.🔮 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
2. 2.🔍 Which is the odd one out? (a) a fridge magnet (b) a vacuum cleaner (c) a suction hook (d) a bicycle pump
3. 3.True or false: a bicycle pump works by air pressure. (a) True (b) False
4. 4.🥛 Does a bicycle pump work by air pressure or by magnetism? (a) magnetism (b) air pressure
5. 5.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) air inside pushes back (b) the bottle is magnetic (c) the cap is sticky (d) water is hiding there
6. 6.True or false: a compass needle works by magnetism. (a) True (b) False
7. 7.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) needed (b) not needed
8. 8.True or false: turmeric powder is not needed for the card-on-a-glass trick. (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 card flies away (b) the glass breaks (c) the card stays on (d) the water turns to ice
10. 10.🔍 Which is the odd one out? (a) a drinking straw (b) a compass needle (c) a suction hook (d) a bicycle pump
11. 11.⚖️ 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 measure it (b) we change it (c) we keep it the same
12. 12.⚖️ 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 same card
13. 13.🔍 Which is the odd one out? (a) a magnetic chess set (b) a fridge magnet (c) a compass needle (d) a vacuum cleaner
14. 14.True or false: a suction hook works by magnetism. (a) True (b) False
15. 15.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a stiff postcard (b) a magnet (c) a sink or a bucket (d) a towel
16. 16.🔍 Which is the odd one out? (a) a drinking straw (b) a magnetic pin holder (c) a bicycle pump (d) a medicine dropper
17. 17.⚖️ 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 change it (c) we measure it
18. 18.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) needed (b) not needed
19. 19.⚖️ 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 way we turn it (b) the same card (c) how full the glass is (d) the same glass
20. 20.⚖️ 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) True (b) False
21. 21.🔮 Predict: you blow up a balloon. What fills it? (a) air (b) water (c) sand (d) smoke
22. 22.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) needed (b) not needed
23. 23.🛟 Where should you do the card-and-glass trick? (a) on a bed (b) near a plug point (c) over a laptop (d) over a sink or bucket
24. 24.🔍 Which is the odd one out? (a) a fridge magnet (b) a magnetic chess set (c) a drinking straw (d) a compass needle
25. 25.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a sink or a bucket (b) a stiff postcard (c) a towel (d) yeast
26. 26.🧺 Do we need a mirror for the card-on-a-glass trick? (a) needed (b) not needed
27. 27.True or false: a glass of water is needed for the card-on-a-glass trick. (a) False (b) True
28. 28.True or false: a towel is not needed for the card-on-a-glass trick. (a) True (b) False
29. 29.🥛 Why is it best to fill the glass right to the top? (a) it looks nicer (b) the card gets wet (c) water is heavier (d) little air left inside
30. 30.True or false: a glass of water is not needed for the card-on-a-glass trick. (a) True (b) False
31. 31.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is heavier (b) it will not break (c) it is hotter (d) it is magnetic
32. 32.🧺 Do we need a balloon for the card-on-a-glass trick? (a) needed (b) not needed
33. 33.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a balloon (c) a glass of water (d) a sink or a bucket
34. 34.📘 Air presses on everything around us. What is this push called? (a) air pressure (b) friction (c) magnetism (d) sunlight
35. 35.🥛 Which of these works by magnetism? (a) a drinking straw (b) a compass needle (c) a bicycle pump (d) a vacuum cleaner
36. 36.⚖️ 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) the same glass (b) how full the glass is (c) whether the card stays
37. 37.🥤 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
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 glass”? (a) we measure it (b) we keep it the same (c) we change it
39. 39.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a sink or a bucket (b) turmeric powder (c) a stiff postcard (d) a towel
40. 40.True or false: a vacuum cleaner works by air pressure. (a) True (b) False

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