Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 901 · 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 of these works by magnetism? (a) a drinking straw (b) a vacuum cleaner (c) a suction hook (d) a fridge magnet
2. 2.🔮 Why do we try the card trick over a sink or a bucket? (a) to make it rain (b) to cool the glass (c) to grow plants (d) to catch any spills
3. 3.🥛 Does a compass needle work by air pressure or by magnetism? (a) magnetism (b) air pressure
4. 4.🔍 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 glass breaks (c) the card stays on (d) the card flies away
5. 5.🥛 Which of these works by magnetism? (a) a vacuum cleaner (b) a medicine dropper (c) a compass needle (d) a drinking straw
6. 6.⚖️ 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
7. 7.🧺 Do we need a magnet for the card-on-a-glass trick? (a) needed (b) not needed
8. 8.🔍 Which is the odd one out? (a) a suction hook (b) a drinking straw (c) a bicycle pump (d) a magnetic chess set
9. 9.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) water is hiding there (b) the cap is sticky (c) air inside pushes back (d) the bottle is magnetic
10. 10.🥛 Does a suction hook work by air pressure or by magnetism? (a) air pressure (b) magnetism
11. 11.🥛 Does a drinking straw work by air pressure or by magnetism? (a) air pressure (b) magnetism
12. 12.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same card is kept the same. (a) False (b) True
13. 13.🔍 Which is the odd one out? (a) a compass needle (b) a fridge magnet (c) a medicine dropper (d) a magnetic pin holder
14. 14.True or false: a balloon is needed for the card-on-a-glass trick. (a) True (b) False
15. 15.🔍 Which is the odd one out? (a) a bicycle pump (b) a suction hook (c) a fridge magnet (d) a drinking straw
16. 16.⚖️ 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 same glass (c) how full the glass is
17. 17.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a stiff postcard (c) a towel (d) a magnet
18. 18.🧺 Do we need a balloon for the card-on-a-glass trick? (a) not needed (b) needed
19. 19.🔍 Which is the odd one out? (a) a magnetic pin holder (b) a compass needle (c) a fridge magnet (d) a drinking straw
20. 20.🧺 Do we need a mirror for the card-on-a-glass trick? (a) not needed (b) needed
21. 21.🧺 Do we need a sink or a bucket 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? Which of these is the one thing we change? (a) how full the glass is (b) the way we turn it (c) the same card (d) whether the card stays
23. 23.True or false: a balloon is not needed for the card-on-a-glass trick. (a) True (b) False
24. 24.🔮 Predict: you blow up a balloon. What fills it? (a) smoke (b) air (c) water (d) sand
25. 25.⚖️ 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) how full the glass is (b) whether the card stays (c) the same card (d) the same glass
26. 26.🧺 Do we need turmeric powder for the card-on-a-glass trick? (a) needed (b) not needed
27. 27.🛟 Where should you do the card-and-glass trick? (a) near a plug point (b) over a laptop (c) over a sink or bucket (d) on a bed
28. 28.True or false: a suction hook works by air pressure. (a) False (b) True
29. 29.True or false: a medicine dropper works by magnetism. (a) False (b) True
30. 30.🥛 Does a magnetic chess set work by air pressure or by magnetism? (a) air pressure (b) magnetism
31. 31.True or false: a sink or a bucket is not needed for the card-on-a-glass trick. (a) False (b) True
32. 32.⚖️ 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
33. 33.🛟 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
34. 34.⚖️ 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
35. 35.True or false: a compass needle works by air pressure. (a) True (b) False
36. 36.🧺 Which of these is needed for the card-on-a-glass trick? (a) a battery cell (b) a sink or a bucket (c) a mirror (d) yeast
37. 37.🔍 Which is the odd one out? (a) a vacuum cleaner (b) a medicine dropper (c) a compass needle (d) a bicycle pump
38. 38.🥛 What holds the card up against the upside-down glass? (a) the cold water (b) glue on the card (c) air pushing up (d) a magnet
39. 39.True or false: a magnet 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? What do we do with “how full the glass is”? (a) we measure it (b) we keep it the same (c) we change it

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