Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 633 · 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 sink or a bucket (c) a stiff postcard (d) a magnet
2. 2.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a magnet (b) a towel (c) a sink or a bucket (d) a stiff postcard
3. 3.⚖️ 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
4. 4.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) not needed (b) needed
5. 5.🛟 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
6. 6.🧺 Do we need a magnet for the card-on-a-glass trick? (a) not needed (b) needed
7. 7.🥛 What holds the card up against the upside-down glass? (a) a magnet (b) air pushing up (c) glue on the card (d) the cold water
8. 8.🥛 Which of these works by magnetism? (a) a suction hook (b) a compass needle (c) a bicycle pump (d) a drinking straw
9. 9.🧺 Do we need yeast for the card-on-a-glass trick? (a) needed (b) not needed
10. 10.🥛 Which of these works by magnetism? (a) a drinking straw (b) a vacuum cleaner (c) a magnetic pin holder (d) a bicycle pump
11. 11.True or false: a sink or a bucket is needed for the card-on-a-glass trick. (a) False (b) True
12. 12.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the glass breaks (b) the water turns to ice (c) the card stays on (d) the card flies away
13. 13.⚖️ 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) how full the glass is (b) the same glass (c) whether the card stays (d) the way we turn it
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) how full the glass is (b) whether the card stays (c) the way we turn it
15. 15.⚖️ 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) True (b) False
16. 16.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a sink or a bucket (c) a glass of water (d) a battery cell
17. 17.True or false: a bicycle pump works by air pressure. (a) False (b) True
18. 18.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) not needed (b) needed
19. 19.🧺 Which of these is needed for the card-on-a-glass trick? (a) a battery cell (b) a balloon (c) a sink or a bucket (d) yeast
20. 20.True or false: a glass of water is not needed for the card-on-a-glass trick. (a) False (b) True
21. 21.True or false: a suction hook works by air pressure. (a) False (b) True
22. 22.True or false: a stiff postcard is not needed for the card-on-a-glass trick. (a) False (b) True
23. 23.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) a mirror (c) a glass of water (d) a stiff postcard
24. 24.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a magnetic pin holder (c) a compass needle (d) a vacuum cleaner
25. 25.🛟 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
26. 26.⚖️ 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) True (b) False
27. 27.True or false: a mirror is not needed for the card-on-a-glass trick. (a) True (b) False
28. 28.🧺 Which of these is needed for the card-on-a-glass trick? (a) a mirror (b) turmeric powder (c) yeast (d) a stiff postcard
29. 29.🔍 Which is the odd one out? (a) a vacuum cleaner (b) a suction hook (c) a drinking straw (d) a fridge magnet
30. 30.🥛 Why is it best to fill the glass right to the top? (a) the card gets wet (b) water is heavier (c) it looks nicer (d) little air left inside
31. 31.True or false: a glass of water is needed for the card-on-a-glass trick. (a) False (b) True
32. 32.🧺 Which of these is needed for the card-on-a-glass trick? (a) a balloon (b) a glass of water (c) a battery cell (d) turmeric powder
33. 33.🥛 Which of these works by air pressure? (a) a magnetic chess set (b) a drinking straw (c) a compass needle (d) a magnetic pin holder
34. 34.⚖️ 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 kept the same. (a) True (b) False
35. 35.⚖️ 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 glass (c) whether the card stays
36. 36.True or false: a bicycle pump works by magnetism. (a) False (b) True
37. 37.🥛 Does a drinking straw work by air pressure or by magnetism? (a) magnetism (b) air pressure
38. 38.⚖️ 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
39. 39.🧺 Which of these is needed for the card-on-a-glass trick? (a) a towel (b) a battery cell (c) a balloon (d) a magnet
40. 40.🔮 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

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