Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 629 · 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.⚖️ 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
2. 2.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) a stiff postcard (c) a towel (d) a magnet
3. 3.🔍 Which is the odd one out? (a) a suction hook (b) a fridge magnet (c) a magnetic pin holder (d) a compass needle
4. 4.🛟 Why is a plastic cup safer than a glass for small children here? (a) it will not break (b) it is hotter (c) it is heavier (d) it is magnetic
5. 5.True or false: a towel is needed for the card-on-a-glass trick. (a) True (b) False
6. 6.🛟 Where should you do the card-and-glass trick? (a) over a laptop (b) near a plug point (c) on a bed (d) over a sink or bucket
7. 7.True or false: a battery cell is not needed for the card-on-a-glass trick. (a) False (b) True
8. 8.🥛 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
9. 9.🧺 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 battery cell (d) a sink or a bucket
10. 10.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the cap is sticky (b) the bottle is magnetic (c) air inside pushes back (d) water is hiding there
11. 11.🥛 What holds the card up against the upside-down glass? (a) glue on the card (b) air pushing up (c) the cold water (d) a magnet
12. 12.🧺 Which of these is needed for the card-on-a-glass trick? (a) a magnet (b) a battery cell (c) a towel (d) a balloon
13. 13.True or false: a battery cell is needed for the card-on-a-glass trick. (a) False (b) True
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.True or false: a vacuum cleaner works by air pressure. (a) True (b) False
16. 16.🧺 Which of these is needed for the card-on-a-glass trick? (a) turmeric powder (b) a magnet (c) a glass of water (d) a balloon
17. 17.True or false: a magnetic pin holder works by air pressure. (a) False (b) True
18. 18.🥛 Does a bicycle pump work by air pressure or by magnetism? (a) magnetism (b) air pressure
19. 19.🧺 Which of these is not needed for the card-on-a-glass trick? (a) turmeric powder (b) a stiff postcard (c) a sink or a bucket (d) a towel
20. 20.🔍 Which is the odd one out? (a) a fridge magnet (b) a medicine dropper (c) a bicycle pump (d) a suction hook
21. 21.True or false: a fridge magnet works by air pressure. (a) False (b) True
22. 22.🥛 Does a medicine dropper work by air pressure or by magnetism? (a) air pressure (b) magnetism
23. 23.🧺 Do we need turmeric powder for the card-on-a-glass trick? (a) needed (b) not needed
24. 24.⚖️ 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
25. 25.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the card flies away (b) the card stays on (c) the glass breaks (d) the water turns to ice
26. 26.⚖️ 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
27. 27.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a stiff postcard (b) a sink or a bucket (c) yeast (d) a towel
28. 28.⚖️ 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
29. 29.🥛 Does a drinking straw work by air pressure or by magnetism? (a) magnetism (b) air pressure
30. 30.🥛 Which of these works by magnetism? (a) a medicine dropper (b) a bicycle pump (c) a drinking straw (d) a fridge magnet
31. 31.True or false: a balloon 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: whether the card stays is kept the same. (a) False (b) True
33. 33.True or false: a sink or a bucket is needed for the card-on-a-glass trick. (a) True (b) False
34. 34.🔍 Which is the odd one out? (a) a magnetic chess set (b) a bicycle pump (c) a drinking straw (d) a vacuum cleaner
35. 35.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a mirror (b) a towel (c) a glass of water (d) a stiff postcard
36. 36.🔍 Which is the odd one out? (a) a compass needle (b) a fridge magnet (c) a magnetic pin holder (d) a drinking straw
37. 37.🥛 Which of these works by air pressure? (a) a magnetic pin holder (b) a compass needle (c) a fridge magnet (d) a drinking straw
38. 38.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a sink or a bucket (c) yeast (d) a stiff postcard
39. 39.⚖️ 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
40. 40.⚖️ 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 way we turn it (b) how full the glass is (c) whether the card stays

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