Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 103 · 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.True or false: a magnetic pin holder works by magnetism. (a) True (b) False
2. 2.True or false: a sink or a bucket is needed for the card-on-a-glass trick. (a) False (b) True
3. 3.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a mirror (c) a towel (d) a stiff postcard
4. 4.🥛 Does a magnetic pin holder work by air pressure or by magnetism? (a) air pressure (b) magnetism
5. 5.True or false: yeast is needed for the card-on-a-glass trick. (a) False (b) True
6. 6.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a compass needle (c) a suction hook (d) a magnetic pin holder
7. 7.True or false: a bicycle pump works by magnetism. (a) True (b) False
8. 8.🔍 Which is the odd one out? (a) a medicine dropper (b) a drinking straw (c) a magnetic chess set (d) a bicycle pump
9. 9.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) air inside pushes back (b) the bottle is magnetic (c) the cap is sticky (d) water is hiding there
10. 10.⚖️ 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) the same card (c) whether the card stays
11. 11.True or false: a magnet is needed for the card-on-a-glass trick. (a) True (b) False
12. 12.🥛 Which of these works by air pressure? (a) a medicine dropper (b) a magnetic pin holder (c) a fridge magnet (d) a compass needle
13. 13.🧺 Which of these is needed for the card-on-a-glass trick? (a) a mirror (b) a battery cell (c) yeast (d) a towel
14. 14.⚖️ 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 kept the same. (a) False (b) True
15. 15.🧺 Do we need a battery cell for the card-on-a-glass trick? (a) needed (b) not needed
16. 16.⚖️ 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) the same glass (c) the same card (d) whether the card stays
17. 17.🔮 Why do we try the card trick over a sink or a bucket? (a) to grow plants (b) to catch any spills (c) to cool the glass (d) to make it rain
18. 18.⚖️ 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 way we turn it (d) the same card
19. 19.True or false: a suction hook works by air pressure. (a) True (b) False
20. 20.⚖️ 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) True (b) False
21. 21.🛟 Where should you do the card-and-glass trick? (a) over a sink or bucket (b) on a bed (c) over a laptop (d) near a plug point
22. 22.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the glass breaks (b) the card flies away (c) the card stays on (d) the water turns to ice
23. 23.🔍 Which is the odd one out? (a) a magnetic chess set (b) a fridge magnet (c) a magnetic pin holder (d) a vacuum cleaner
24. 24.🔮 Predict: you blow up a balloon. What fills it? (a) water (b) air (c) sand (d) smoke
25. 25.🧺 Do we need yeast for the card-on-a-glass trick? (a) needed (b) not needed
26. 26.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is magnetic (b) it is hotter (c) it will not break (d) it is heavier
27. 27.🥛 Does a medicine dropper work by air pressure or by magnetism? (a) air pressure (b) magnetism
28. 28.True or false: a stiff postcard is needed for the card-on-a-glass trick. (a) False (b) True
29. 29.True or false: a sink or a bucket is not needed for the card-on-a-glass trick. (a) False (b) True
30. 30.True or false: a fridge magnet works by air pressure. (a) False (b) True
31. 31.🥛 Does a vacuum cleaner work by air pressure or by magnetism? (a) air pressure (b) magnetism
32. 32.🥛 Does a bicycle pump work by air pressure or by magnetism? (a) magnetism (b) air pressure
33. 33.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) not needed (b) needed
34. 34.🔍 Which is the odd one out? (a) a medicine dropper (b) a vacuum cleaner (c) a bicycle pump (d) a compass needle
35. 35.🧺 Which of these is needed for the card-on-a-glass trick? (a) a magnet (b) a stiff postcard (c) yeast (d) a balloon
36. 36.⚖️ 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
37. 37.True or false: yeast is not needed for the card-on-a-glass trick. (a) False (b) True
38. 38.🧺 Do we need a magnet for the card-on-a-glass trick? (a) not needed (b) needed
39. 39.🥛 What holds the card up against the upside-down glass? (a) the cold water (b) a magnet (c) glue on the card (d) air pushing up
40. 40.🧺 Do we need a balloon for the card-on-a-glass trick? (a) not needed (b) needed

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