Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 359 · 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? Which of these is kept the same? (a) the same card (b) whether the card stays (c) how full the glass is
2. 2.🥛 Which of these works by air pressure? (a) a suction hook (b) a compass needle (c) a fridge magnet (d) a magnetic pin holder
3. 3.🥛 Does a drinking straw work by air pressure or by magnetism? (a) air pressure (b) magnetism
4. 4.🔍 Which is the odd one out? (a) a suction hook (b) a fridge magnet (c) a compass needle (d) a magnetic pin holder
5. 5.⚖️ 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 keep it the same (c) we measure it
6. 6.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) a sink or a bucket (c) a battery cell (d) a stiff postcard
7. 7.🧺 Do we need a mirror for the card-on-a-glass trick? (a) needed (b) not needed
8. 8.🥛 Which of these works by magnetism? (a) a drinking straw (b) a compass needle (c) a bicycle pump (d) a vacuum cleaner
9. 9.🔮 Why do we try the card trick over a sink or a bucket? (a) to grow plants (b) to cool the glass (c) to catch any spills (d) to make it rain
10. 10.📘 Air presses on everything around us. What is this push called? (a) friction (b) magnetism (c) sunlight (d) air pressure
11. 11.🔮 Predict: you blow up a balloon. What fills it? (a) water (b) sand (c) air (d) smoke
12. 12.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the bottle is magnetic (b) water is hiding there (c) the cap is sticky (d) air inside pushes back
13. 13.🥛 What holds the card up against the upside-down glass? (a) glue on the card (b) the cold water (c) air pushing up (d) a magnet
14. 14.⚖️ 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
15. 15.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) a stiff postcard (c) a magnet (d) a towel
16. 16.🥛 Does a vacuum cleaner work by air pressure or by magnetism? (a) magnetism (b) air pressure
17. 17.🥤 Why does juice go up a drinking straw when you sip? (a) juice likes plastic (b) the straw is magnetic (c) air pushes it up (d) the straw is hot
18. 18.🧺 Which of these is needed for the card-on-a-glass trick? (a) yeast (b) turmeric powder (c) a balloon (d) a sink or a bucket
19. 19.🧺 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) yeast (d) a towel
20. 20.⚖️ 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) whether the card stays (c) the way we turn it
21. 21.🧺 Which of these is needed for the card-on-a-glass trick? (a) a battery cell (b) a glass of water (c) a magnet (d) a mirror
22. 22.True or false: a magnetic chess set works by magnetism. (a) True (b) False
23. 23.⚖️ 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) whether the card stays (b) how full the glass is (c) the same glass (d) the way we turn it
24. 24.⚖️ 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
25. 25.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a battery cell (b) a glass of water (c) a stiff postcard (d) a towel
26. 26.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) needed (b) not needed
27. 27.🥛 Which of these works by magnetism? (a) a magnetic pin holder (b) a drinking straw (c) a vacuum cleaner (d) a bicycle pump
28. 28.🛟 Where should you do the card-and-glass trick? (a) near a plug point (b) on a bed (c) over a sink or bucket (d) over a laptop
29. 29.True or false: a sink or a bucket is needed for the card-on-a-glass trick. (a) True (b) False
30. 30.🧺 Do we need yeast for the card-on-a-glass trick? (a) needed (b) not needed
31. 31.True or false: yeast 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? Which of these is the one thing we change? (a) whether the card stays (b) the way we turn it (c) how full the glass is (d) the same card
33. 33.True or false: a sink or a bucket is not needed for the card-on-a-glass trick. (a) False (b) True
34. 34.⚖️ 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 keep it the same (b) we change it (c) we measure it
35. 35.🛟 Why is a plastic cup safer than a glass for small children here? (a) it will not break (b) it is magnetic (c) it is hotter (d) it is heavier
36. 36.True or false: a suction hook works by air pressure. (a) False (b) True
37. 37.⚖️ 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 what we measure. (a) True (b) False
38. 38.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) needed (b) not needed
39. 39.🥛 Does a suction hook work by air pressure or by magnetism? (a) air pressure (b) magnetism
40. 40.🧺 Do we need a balloon for the card-on-a-glass trick? (a) needed (b) not needed

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