Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 768 · 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.🧺 Do we need a balloon for the card-on-a-glass trick? (a) needed (b) not needed
2. 2.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is heavier (b) it will not break (c) it is hotter (d) it is magnetic
3. 3.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) a sink or a bucket (c) a glass of water (d) turmeric powder
4. 4.True or false: a sink or a bucket is not needed for the card-on-a-glass trick. (a) False (b) True
5. 5.True or false: a magnetic chess set works by magnetism. (a) False (b) True
6. 6.🥛 Does a drinking straw work by air pressure or by magnetism? (a) magnetism (b) air pressure
7. 7.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) air inside pushes back (b) the cap is sticky (c) the bottle is magnetic (d) water is hiding there
8. 8.🧺 Which of these is needed for the card-on-a-glass trick? (a) a mirror (b) a battery cell (c) a towel (d) a balloon
9. 9.🥛 Does a suction hook work by air pressure or by magnetism? (a) magnetism (b) air pressure
10. 10.🥛 Does a vacuum cleaner work by air pressure or by magnetism? (a) magnetism (b) air pressure
11. 11.⚖️ 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 glass (c) how full the glass is (d) the same card
12. 12.🥛 Which of these works by air pressure? (a) a vacuum cleaner (b) a magnetic pin holder (c) a compass needle (d) a fridge magnet
13. 13.🧺 Do we need yeast for the card-on-a-glass trick? (a) not needed (b) needed
14. 14.🥛 Does a magnetic pin holder work by air pressure or by magnetism? (a) magnetism (b) air pressure
15. 15.🥛 What holds the card up against the upside-down glass? (a) glue on the card (b) air pushing up (c) a magnet (d) the cold water
16. 16.⚖️ 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 keep it the same (b) we measure it (c) we change it
17. 17.🧺 Do we need turmeric powder for the card-on-a-glass trick? (a) not needed (b) needed
18. 18.True or false: a glass of water is needed for the card-on-a-glass trick. (a) False (b) True
19. 19.🔍 Which is the odd one out? (a) a fridge magnet (b) a magnetic chess set (c) a compass needle (d) a medicine dropper
20. 20.🥛 Why is it best to fill the glass right to the top? (a) little air left inside (b) it looks nicer (c) water is heavier (d) the card gets wet
21. 21.🥛 Does a compass needle work by air pressure or by magnetism? (a) magnetism (b) air pressure
22. 22.True or false: yeast is not needed for the card-on-a-glass trick. (a) False (b) True
23. 23.⚖️ 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 change it (b) we keep it the same (c) we measure it
24. 24.True or false: a magnetic pin holder works by air pressure. (a) False (b) True
25. 25.⚖️ 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) whether the card stays (c) how full the glass is
26. 26.True or false: a towel is not needed for the card-on-a-glass trick. (a) False (b) True
27. 27.True or false: a mirror is not needed for the card-on-a-glass trick. (a) False (b) True
28. 28.🔍 Which is the odd one out? (a) a fridge magnet (b) a suction hook (c) a vacuum cleaner (d) a bicycle pump
29. 29.🔍 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 water turns to ice (c) the card stays on (d) the glass breaks
30. 30.🧺 Do we need a battery cell for the card-on-a-glass trick? (a) not needed (b) needed
31. 31.🥛 Which of these works by magnetism? (a) a magnetic pin holder (b) a medicine dropper (c) a vacuum cleaner (d) a drinking straw
32. 32.🛟 Where should you do the card-and-glass trick? (a) on a bed (b) over a laptop (c) over a sink or bucket (d) near a plug point
33. 33.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a magnet (c) a sink or a bucket (d) a glass of water
34. 34.🧺 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 glass of water (c) a towel (d) a mirror
35. 35.🔮 Predict: you blow up a balloon. What fills it? (a) smoke (b) sand (c) water (d) air
36. 36.⚖️ 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) the same glass (c) whether the card stays (d) the same card
37. 37.🥛 Which of these works by magnetism? (a) a suction hook (b) a compass needle (c) a vacuum cleaner (d) a drinking straw
38. 38.⚖️ 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
39. 39.⚖️ 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 same card
40. 40.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) not needed (b) needed

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