Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 402 · 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 is the odd one out? (a) a fridge magnet (b) a magnetic chess set (c) a compass needle (d) a drinking straw
2. 2.⚖️ 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 the one thing we change. (a) False (b) True
3. 3.⚖️ 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) the same card (c) the same glass (d) how full the glass is
4. 4.⚖️ 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 keep it the same (b) we change it (c) we measure it
5. 5.🛟 Why is a plastic cup safer than a glass for small children here? (a) it will not break (b) it is heavier (c) it is magnetic (d) it is hotter
6. 6.⚖️ 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
7. 7.🥛 Which of these works by air pressure? (a) a magnetic chess set (b) a drinking straw (c) a fridge magnet (d) a magnetic pin holder
8. 8.🔮 Why do we try the card trick over a sink or a bucket? (a) to grow plants (b) to catch any spills (c) to make it rain (d) to cool the glass
9. 9.🧺 Do we need turmeric powder for the card-on-a-glass trick? (a) needed (b) not needed
10. 10.🥛 Which of these works by magnetism? (a) a vacuum cleaner (b) a drinking straw (c) a medicine dropper (d) a magnetic chess set
11. 11.True or false: a magnetic chess set works by air pressure. (a) False (b) True
12. 12.🧺 Which of these is needed for the card-on-a-glass trick? (a) a magnet (b) a balloon (c) a battery cell (d) a stiff postcard
13. 13.True or false: a sink or a bucket is needed for the card-on-a-glass trick. (a) False (b) True
14. 14.True or false: a glass of water is needed for the card-on-a-glass trick. (a) True (b) False
15. 15.🥛 Which of these works by air pressure? (a) a medicine dropper (b) a magnetic chess set (c) a fridge magnet (d) a compass needle
16. 16.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the cap is sticky (b) water is hiding there (c) the bottle is magnetic (d) air inside pushes back
17. 17.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) not needed (b) needed
18. 18.True or false: a medicine dropper works by air pressure. (a) False (b) True
19. 19.🔍 Which is the odd one out? (a) a magnetic chess set (b) a fridge magnet (c) a compass needle (d) a vacuum cleaner
20. 20.⚖️ 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
21. 21.True or false: a magnetic chess set works by magnetism. (a) True (b) False
22. 22.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a stiff postcard (b) a towel (c) a balloon (d) a sink or a bucket
23. 23.🔍 Which is the odd one out? (a) a drinking straw (b) a vacuum cleaner (c) a bicycle pump (d) a magnetic pin holder
24. 24.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same glass is what we measure. (a) True (b) False
25. 25.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) needed (b) not needed
26. 26.🥛 Does a drinking straw work by air pressure or by magnetism? (a) magnetism (b) air pressure
27. 27.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the way we turn it is what we measure. (a) False (b) True
28. 28.🔮 Predict: you blow up a balloon. What fills it? (a) sand (b) water (c) smoke (d) air
29. 29.🧺 Which of these is needed for the card-on-a-glass trick? (a) yeast (b) a battery cell (c) a magnet (d) a glass of water
30. 30.True or false: a compass needle works by air pressure. (a) True (b) False
31. 31.True or false: a compass needle works by magnetism. (a) True (b) False
32. 32.⚖️ 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
33. 33.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same card is the one thing we change. (a) False (b) True
34. 34.True or false: a fridge magnet works by magnetism. (a) False (b) True
35. 35.True or false: a bicycle pump works by magnetism. (a) False (b) True
36. 36.🧺 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 stiff postcard (d) turmeric powder
37. 37.True or false: turmeric powder is needed for the card-on-a-glass trick. (a) False (b) True
38. 38.🧺 Which of these is needed for the card-on-a-glass trick? (a) a magnet (b) a sink or a bucket (c) a mirror (d) turmeric powder
39. 39.🥤 Why does juice go up a drinking straw when you sip? (a) the straw is hot (b) air pushes it up (c) juice likes plastic (d) the straw is magnetic
40. 40.🛟 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

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