Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 39 · 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.🧺 Do we need yeast for the card-on-a-glass trick? (a) not needed (b) needed
2. 2.🥛 Which of these works by air pressure? (a) a compass needle (b) a magnetic pin holder (c) a magnetic chess set (d) a bicycle pump
3. 3.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a magnet (c) a towel (d) a sink or a bucket
4. 4.🥛 Which of these works by air pressure? (a) a magnetic chess set (b) a compass needle (c) a magnetic pin holder (d) a suction hook
5. 5.⚖️ 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 keep it the same (b) we measure it (c) we change it
6. 6.True or false: a towel is not needed for the card-on-a-glass trick. (a) True (b) False
7. 7.⚖️ 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 same glass (b) how full the glass is (c) the same card (d) whether the card stays
8. 8.🥛 Does a suction hook work by air pressure or by magnetism? (a) magnetism (b) air pressure
9. 9.🥛 Why is it best to fill the glass right to the top? (a) the card gets wet (b) little air left inside (c) it looks nicer (d) water is heavier
10. 10.True or false: a vacuum cleaner works by air pressure. (a) False (b) True
11. 11.True or false: a sink or a bucket is not needed for the card-on-a-glass trick. (a) False (b) True
12. 12.🥛 Does a bicycle pump work by air pressure or by magnetism? (a) magnetism (b) air pressure
13. 13.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a towel (b) a battery cell (c) a glass of water (d) a sink or a bucket
14. 14.⚖️ 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 change it (b) we keep it the same (c) we measure it
15. 15.🧺 Which of these is needed for the card-on-a-glass trick? (a) a magnet (b) a mirror (c) a balloon (d) a glass of water
16. 16.🔍 Which is the odd one out? (a) a suction hook (b) a bicycle pump (c) a drinking straw (d) a magnetic pin holder
17. 17.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a glass of water (c) a mirror (d) a sink or a bucket
18. 18.🥛 Which of these works by air pressure? (a) a medicine dropper (b) a magnetic chess set (c) a fridge magnet (d) a magnetic pin holder
19. 19.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the water turns to ice (b) the card stays on (c) the glass breaks (d) the card flies away
20. 20.🔍 Which is the odd one out? (a) a fridge magnet (b) a magnetic pin holder (c) a vacuum cleaner (d) a compass needle
21. 21.🧺 Do we need a towel for the card-on-a-glass trick? (a) needed (b) not needed
22. 22.⚖️ 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
23. 23.🛟 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
24. 24.🧺 Do we need a magnet for the card-on-a-glass trick? (a) needed (b) not needed
25. 25.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a glass of water (c) a towel (d) a magnet
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 change it (b) we measure it (c) we keep it the same
27. 27.True or false: a fridge magnet works by air pressure. (a) False (b) True
28. 28.🥛 Which of these works by magnetism? (a) a medicine dropper (b) a suction hook (c) a drinking straw (d) a magnetic chess set
29. 29.🥛 Does a fridge magnet work by air pressure or by magnetism? (a) magnetism (b) air pressure
30. 30.⚖️ 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) how full the glass is (c) the same card (d) whether the card stays
31. 31.True or false: a bicycle pump works by air pressure. (a) False (b) True
32. 32.🧺 Do we need a balloon for the card-on-a-glass trick? (a) needed (b) not needed
33. 33.True or false: turmeric powder is needed for the card-on-a-glass trick. (a) False (b) True
34. 34.⚖️ 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) whether the card stays (c) how full the glass is
35. 35.True or false: a magnetic pin holder works by air pressure. (a) False (b) True
36. 36.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) not needed (b) needed
37. 37.⚖️ 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 keep it the same (b) we change it (c) we measure it
38. 38.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a towel (b) a glass of water (c) a stiff postcard (d) a balloon
39. 39.True or false: a battery cell is needed for the card-on-a-glass trick. (a) True (b) False
40. 40.⚖️ 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 kept the same. (a) True (b) False

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