Air Pressure Experiment Worksheet

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

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