Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 842 · 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.True or false: a towel is not needed for the card-on-a-glass trick. (a) True (b) False
2. 2.🔍 Which is the odd one out? (a) a suction hook (b) a drinking straw (c) a fridge magnet (d) a vacuum cleaner
3. 3.⚖️ 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
4. 4.🧺 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 glass of water (d) a towel
5. 5.🥛 Which of these works by air pressure? (a) a compass needle (b) a drinking straw (c) a magnetic chess set (d) a fridge magnet
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 kept the same. (a) True (b) False
7. 7.📘 Air presses on everything around us. What is this push called? (a) magnetism (b) friction (c) sunlight (d) air pressure
8. 8.🧺 Which of these is needed for the card-on-a-glass trick? (a) a balloon (b) a sink or a bucket (c) turmeric powder (d) a magnet
9. 9.True or false: a medicine dropper works by air pressure. (a) True (b) False
10. 10.🥛 Which of these works by magnetism? (a) a medicine dropper (b) a compass needle (c) a bicycle pump (d) a vacuum cleaner
11. 11.🔍 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 stays on (c) the card flies away (d) the water turns to ice
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 way we turn it (b) the same card (c) the same glass (d) whether the card stays
13. 13.⚖️ 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
14. 14.True or false: a magnetic pin holder works by magnetism. (a) False (b) True
15. 15.🧺 Do we need a mirror for the card-on-a-glass trick? (a) not needed (b) needed
16. 16.True or false: a fridge magnet works by magnetism. (a) True (b) False
17. 17.🥛 Does a drinking straw work by air pressure or by magnetism? (a) magnetism (b) air pressure
18. 18.🔮 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) water is hiding there (d) air inside pushes back
19. 19.True or false: a suction hook works by magnetism. (a) False (b) True
20. 20.🛟 Why is a plastic cup safer than a glass for small children here? (a) it will not break (b) it is magnetic (c) it is hotter (d) it is heavier
21. 21.⚖️ 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 glass (c) the same card (d) how full the glass is
22. 22.🧺 Do we need yeast for the card-on-a-glass trick? (a) needed (b) not needed
23. 23.🧺 Which of these is needed for the card-on-a-glass trick? (a) a balloon (b) a mirror (c) turmeric powder (d) a glass of water
24. 24.🛟 Where should you do the card-and-glass trick? (a) over a laptop (b) over a sink or bucket (c) near a plug point (d) on a bed
25. 25.⚖️ 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
26. 26.⚖️ 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
27. 27.🔮 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
28. 28.⚖️ 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
29. 29.🥤 Why does juice go up a drinking straw when you sip? (a) the straw is magnetic (b) the straw is hot (c) air pushes it up (d) juice likes plastic
30. 30.True or false: a bicycle pump works by magnetism. (a) False (b) True
31. 31.🥛 Which of these works by air pressure? (a) a magnetic chess set (b) a suction hook (c) a compass needle (d) a magnetic pin holder
32. 32.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) a stiff postcard (c) a mirror (d) a sink or a bucket
33. 33.🥛 Does a magnetic chess set work by air pressure or by magnetism? (a) magnetism (b) air pressure
34. 34.True or false: a magnetic pin holder works by air pressure. (a) True (b) False
35. 35.🧺 Which of these is needed for the card-on-a-glass trick? (a) a balloon (b) a battery cell (c) a magnet (d) a towel
36. 36.True or false: a magnetic chess set works by magnetism. (a) True (b) False
37. 37.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a towel (c) a battery cell (d) a stiff postcard
38. 38.🥛 Which of these works by air pressure? (a) a magnetic pin holder (b) a fridge magnet (c) a vacuum cleaner (d) a compass needle
39. 39.🧺 Which of these is needed for the card-on-a-glass trick? (a) a mirror (b) a stiff postcard (c) a battery cell (d) a balloon
40. 40.🔮 Predict: you blow up a balloon. What fills it? (a) smoke (b) air (c) water (d) sand

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