Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 682 · 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 glass of water (b) a magnet (c) a stiff postcard (d) a sink or a bucket
2. 2.🔍 Which is the odd one out? (a) a magnetic pin holder (b) a suction hook (c) a compass needle (d) a magnetic chess set
3. 3.⚖️ 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 glass
4. 4.🔮 Predict: you blow up a balloon. What fills it? (a) sand (b) smoke (c) water (d) air
5. 5.🧺 Which of these is needed for the card-on-a-glass trick? (a) turmeric powder (b) yeast (c) a balloon (d) a stiff postcard
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 way we turn it (d) the same glass
7. 7.True or false: a glass of water is needed for the card-on-a-glass trick. (a) True (b) False
8. 8.🔍 Which is the odd one out? (a) a vacuum cleaner (b) a magnetic pin holder (c) a magnetic chess set (d) a fridge magnet
9. 9.⚖️ 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 change it (b) we measure it (c) we keep it the same
10. 10.🥛 What holds the card up against the upside-down glass? (a) a magnet (b) air pushing up (c) the cold water (d) glue on the card
11. 11.🧺 Do we need a balloon for the card-on-a-glass trick? (a) not needed (b) needed
12. 12.🥛 Which of these works by air pressure? (a) a drinking straw (b) a compass needle (c) a magnetic chess set (d) a fridge magnet
13. 13.🛟 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 magnetic (d) it is hotter
14. 14.🧺 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
15. 15.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the bottle is magnetic (b) air inside pushes back (c) water is hiding there (d) the cap is sticky
16. 16.🧺 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 stiff postcard (d) a glass of water
17. 17.🥛 Does a magnetic pin holder work by air pressure or by magnetism? (a) air pressure (b) magnetism
18. 18.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a towel (c) a balloon (d) a stiff postcard
19. 19.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same card is what we measure. (a) False (b) True
20. 20.🧺 Which of these is needed for the card-on-a-glass trick? (a) yeast (b) a balloon (c) a sink or a bucket (d) a magnet
21. 21.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “the same card”? (a) we measure it (b) we change it (c) we keep it the same
22. 22.🥛 Does a drinking straw work by air pressure or by magnetism? (a) magnetism (b) air pressure
23. 23.⚖️ 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
24. 24.True or false: a towel is needed for the card-on-a-glass trick. (a) True (b) False
25. 25.🛟 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
26. 26.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: whether the card stays is what we measure. (a) True (b) False
27. 27.⚖️ 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
28. 28.True or false: a battery cell 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? True or false: how full the glass is is what we measure. (a) True (b) False
30. 30.🥛 Does a compass needle work by air pressure or by magnetism? (a) air pressure (b) magnetism
31. 31.🧺 Do we need a magnet for the card-on-a-glass trick? (a) needed (b) not needed
32. 32.🔍 Which is the odd one out? (a) a suction hook (b) a drinking straw (c) a medicine dropper (d) a compass needle
33. 33.🧺 Do we need a towel for the card-on-a-glass trick? (a) needed (b) not needed
34. 34.⚖️ 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 the one thing we change. (a) True (b) False
35. 35.True or false: a mirror is not needed for the card-on-a-glass trick. (a) False (b) True
36. 36.True or false: a towel is not needed for the card-on-a-glass trick. (a) True (b) False
37. 37.🔍 Which is the odd one out? (a) a medicine dropper (b) a bicycle pump (c) a drinking straw (d) a magnetic pin holder
38. 38.True or false: a compass needle works by magnetism. (a) True (b) False
39. 39.True or false: turmeric powder is needed for the card-on-a-glass trick. (a) False (b) True
40. 40.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) needed (b) not needed

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