Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 548 · 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.🧺 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 mirror (d) a stiff postcard
2. 2.⚖️ 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) how full the glass is (c) whether the card stays (d) the way we turn it
3. 3.🧺 Do we need a mirror for the card-on-a-glass trick? (a) not needed (b) needed
4. 4.True or false: a magnetic pin holder works by air pressure. (a) True (b) False
5. 5.📘 Air presses on everything around us. What is this push called? (a) friction (b) magnetism (c) sunlight (d) air pressure
6. 6.⚖️ 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
7. 7.True or false: a magnet is needed for the card-on-a-glass trick. (a) False (b) True
8. 8.🔮 Predict: you blow up a balloon. What fills it? (a) sand (b) air (c) water (d) smoke
9. 9.🛟 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 magnetic (d) it is heavier
10. 10.True or false: a mirror is not needed for the card-on-a-glass trick. (a) False (b) True
11. 11.🧺 Which of these is needed for the card-on-a-glass trick? (a) turmeric powder (b) a battery cell (c) a balloon (d) a stiff postcard
12. 12.⚖️ 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
13. 13.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the card stays on (b) the glass breaks (c) the card flies away (d) the water turns to ice
14. 14.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the bottle is magnetic (b) the cap is sticky (c) air inside pushes back (d) water is hiding there
15. 15.🥛 Does a medicine dropper work by air pressure or by magnetism? (a) air pressure (b) magnetism
16. 16.⚖️ 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 measure it (c) we keep it the same
17. 17.🥛 Which of these works by air pressure? (a) a magnetic pin holder (b) a vacuum cleaner (c) a compass needle (d) a fridge magnet
18. 18.🥛 Which of these works by magnetism? (a) a vacuum cleaner (b) a drinking straw (c) a magnetic chess set (d) a suction hook
19. 19.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same card is the one thing we change. (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 glass is what we measure. (a) True (b) False
21. 21.🥛 Which of these works by air pressure? (a) a drinking straw (b) a magnetic pin holder (c) a magnetic chess set (d) a compass needle
22. 22.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a towel (c) a stiff postcard (d) a magnet
23. 23.🥛 Does a vacuum cleaner work by air pressure or by magnetism? (a) magnetism (b) air pressure
24. 24.🥤 Why does juice go up a drinking straw when you sip? (a) juice likes plastic (b) the straw is magnetic (c) the straw is hot (d) air pushes it up
25. 25.🥛 Why is it best to fill the glass right to the top? (a) it looks nicer (b) water is heavier (c) little air left inside (d) the card gets wet
26. 26.True or false: yeast is needed for the card-on-a-glass trick. (a) False (b) True
27. 27.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) needed (b) not needed
28. 28.🛟 Where should you do the card-and-glass trick? (a) near a plug point (b) on a bed (c) over a laptop (d) over a sink or bucket
29. 29.True or false: a glass of water is not needed for the card-on-a-glass trick. (a) False (b) True
30. 30.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) not needed (b) needed
31. 31.🧺 Which of these is needed for the card-on-a-glass trick? (a) a magnet (b) a battery cell (c) a balloon (d) a sink or a bucket
32. 32.🧺 Which of these is needed for the card-on-a-glass trick? (a) turmeric powder (b) a magnet (c) a towel (d) yeast
33. 33.🧺 Do we need a magnet for the card-on-a-glass trick? (a) needed (b) not needed
34. 34.🧺 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
35. 35.🥛 Does a bicycle pump work by air pressure or by magnetism? (a) air pressure (b) magnetism
36. 36.True or false: a magnet is not needed for the card-on-a-glass trick. (a) True (b) False
37. 37.🥛 Does a compass needle work by air pressure or by magnetism? (a) air pressure (b) magnetism
38. 38.🥛 Which of these works by air pressure? (a) a magnetic pin holder (b) a fridge magnet (c) a medicine dropper (d) a compass needle
39. 39.True or false: a fridge magnet works by magnetism. (a) True (b) False
40. 40.⚖️ 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

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