Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 769 · 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 “the same card”? (a) we measure it (b) we change it (c) we keep it the same
2. 2.🥤 Why does juice go up a drinking straw when you sip? (a) the straw is hot (b) the straw is magnetic (c) air pushes it up (d) juice likes plastic
3. 3.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) needed (b) not needed
4. 4.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is magnetic (b) it is heavier (c) it is hotter (d) it will not break
5. 5.⚖️ 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 keep it the same (b) we measure it (c) we change it
6. 6.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same card is what we measure. (a) False (b) True
7. 7.🔍 Which is the odd one out? (a) a fridge magnet (b) a magnetic pin holder (c) a drinking straw (d) a compass needle
8. 8.🛟 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
9. 9.⚖️ 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) False (b) True
10. 10.📘 Air presses on everything around us. What is this push called? (a) friction (b) magnetism (c) sunlight (d) air pressure
11. 11.True or false: a glass of water is needed for the card-on-a-glass trick. (a) False (b) True
12. 12.🧺 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 towel (d) a magnet
13. 13.True or false: a compass needle works by magnetism. (a) True (b) False
14. 14.⚖️ 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 way we turn it (c) how full the glass is
15. 15.🥛 Does a vacuum cleaner work by air pressure or by magnetism? (a) magnetism (b) air pressure
16. 16.🥛 Which of these works by magnetism? (a) a bicycle pump (b) a drinking straw (c) a medicine dropper (d) a magnetic pin holder
17. 17.⚖️ 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 the one thing we change. (a) False (b) True
18. 18.True or false: a towel is needed for the card-on-a-glass trick. (a) True (b) False
19. 19.⚖️ 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 card (b) the same glass (c) the way we turn it (d) how full the glass is
20. 20.🔮 Predict: you blow up a balloon. What fills it? (a) air (b) smoke (c) sand (d) water
21. 21.True or false: a sink or a bucket is not needed for the card-on-a-glass trick. (a) True (b) False
22. 22.⚖️ 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 measure it (b) we change it (c) we keep it the same
23. 23.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a sink or a bucket (b) a stiff postcard (c) a towel (d) turmeric powder
24. 24.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a mirror (b) a glass of water (c) a stiff postcard (d) a sink or a bucket
25. 25.True or false: a vacuum cleaner works by air pressure. (a) False (b) True
26. 26.True or false: a medicine dropper works by air pressure. (a) True (b) False
27. 27.True or false: a mirror is needed for the card-on-a-glass trick. (a) True (b) False
28. 28.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a towel (b) a glass of water (c) a sink or a bucket (d) a magnet
29. 29.🥛 Which of these works by air pressure? (a) a vacuum cleaner (b) a magnetic chess set (c) a magnetic pin holder (d) a compass needle
30. 30.🔍 Which is the odd one out? (a) a compass needle (b) a medicine dropper (c) a vacuum cleaner (d) a bicycle pump
31. 31.🥛 Does a bicycle pump work by air pressure or by magnetism? (a) magnetism (b) air pressure
32. 32.🧺 Which of these is needed for the card-on-a-glass trick? (a) a balloon (b) a towel (c) a magnet (d) a battery cell
33. 33.🧺 Which of these is needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a magnet (c) a mirror (d) a battery cell
34. 34.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the cap is sticky (b) water is hiding there (c) the bottle is magnetic (d) air inside pushes back
35. 35.🥛 Does a compass needle work by air pressure or by magnetism? (a) air pressure (b) magnetism
36. 36.🥛 Which of these works by air pressure? (a) a magnetic chess set (b) a medicine dropper (c) a compass needle (d) a magnetic pin holder
37. 37.🧺 Do we need turmeric powder for the card-on-a-glass trick? (a) needed (b) not needed
38. 38.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a sink or a bucket (b) a battery cell (c) a glass of water (d) a stiff postcard
39. 39.🔮 Why do we try the card trick over a sink or a bucket? (a) to cool the glass (b) to grow plants (c) to catch any spills (d) to make it rain
40. 40.🔍 Which is the odd one out? (a) a fridge magnet (b) a drinking straw (c) a suction hook (d) a bicycle pump

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