Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 322 · 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 glass of water is needed for the card-on-a-glass trick. (a) False (b) True
2. 2.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is hotter (b) it is magnetic (c) it is heavier (d) it will not break
3. 3.⚖️ 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
4. 4.⚖️ 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) False (b) True
5. 5.🔍 Which is the odd one out? (a) a vacuum cleaner (b) a compass needle (c) a fridge magnet (d) a magnetic pin holder
6. 6.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a mirror (c) a glass of water (d) a sink or a bucket
7. 7.True or false: a bicycle pump works by magnetism. (a) False (b) True
8. 8.⚖️ 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
9. 9.True or false: a mirror is not needed for the card-on-a-glass trick. (a) False (b) True
10. 10.🥛 Which of these works by magnetism? (a) a magnetic chess set (b) a vacuum cleaner (c) a drinking straw (d) a medicine dropper
11. 11.📘 Air presses on everything around us. What is this push called? (a) sunlight (b) friction (c) air pressure (d) magnetism
12. 12.True or false: a magnetic pin holder works by magnetism. (a) True (b) False
13. 13.⚖️ 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) how full the glass is (c) whether the card stays
14. 14.🥛 What holds the card up against the upside-down glass? (a) a magnet (b) glue on the card (c) the cold water (d) air pushing up
15. 15.🛟 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
16. 16.🥛 Why is it best to fill the glass right to the top? (a) the card gets wet (b) it looks nicer (c) water is heavier (d) little air left inside
17. 17.🧺 Which of these is needed for the card-on-a-glass trick? (a) a magnet (b) turmeric powder (c) yeast (d) a towel
18. 18.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) a glass of water (c) a stiff postcard (d) a magnet
19. 19.🔍 Which is the odd one out? (a) a fridge magnet (b) a suction hook (c) a drinking straw (d) a vacuum cleaner
20. 20.🔍 Which is the odd one out? (a) a drinking straw (b) a magnetic chess set (c) a medicine dropper (d) a bicycle pump
21. 21.🥛 Does a vacuum cleaner work by air pressure or by magnetism? (a) magnetism (b) air pressure
22. 22.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a battery cell (b) a sink or a bucket (c) a glass of water (d) a towel
23. 23.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the cap is sticky (b) air inside pushes back (c) water is hiding there (d) the bottle is magnetic
24. 24.🧺 Do we need a magnet for the card-on-a-glass trick? (a) not needed (b) needed
25. 25.🧺 Which of these is needed for the card-on-a-glass trick? (a) a battery cell (b) a mirror (c) a balloon (d) a glass of water
26. 26.⚖️ 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) the same card (c) the same glass (d) how full the glass is
27. 27.True or false: a fridge magnet works by magnetism. (a) False (b) True
28. 28.True or false: a magnet is 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: the same glass is kept the same. (a) True (b) False
30. 30.🔮 Why do we try the card trick over a sink or a bucket? (a) to catch any spills (b) to cool the glass (c) to grow plants (d) to make it rain
31. 31.⚖️ 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
32. 32.🥛 Which of these works by magnetism? (a) a suction hook (b) a bicycle pump (c) a vacuum cleaner (d) a compass needle
33. 33.🥛 Which of these works by air pressure? (a) a compass needle (b) a bicycle pump (c) a magnetic chess set (d) a magnetic pin holder
34. 34.🔍 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
35. 35.⚖️ 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 keep it the same (c) we measure it
36. 36.🥛 Which of these works by magnetism? (a) a suction hook (b) a magnetic pin holder (c) a vacuum cleaner (d) a medicine dropper
37. 37.True or false: a battery cell is not needed for the card-on-a-glass trick. (a) False (b) True
38. 38.🧺 Do we need a towel for the card-on-a-glass trick? (a) needed (b) not needed
39. 39.True or false: a magnetic chess set works by air pressure. (a) False (b) True
40. 40.⚖️ 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

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