Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 389 · 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? True or false: the same card is kept the same. (a) False (b) True
2. 2.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) water is hiding there (b) air inside pushes back (c) the bottle is magnetic (d) the cap is sticky
3. 3.🧺 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 balloon (c) a glass of water (d) a towel
4. 4.⚖️ 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
5. 5.🔍 Which is the odd one out? (a) a medicine dropper (b) a bicycle pump (c) a magnetic chess set (d) a suction hook
6. 6.⚖️ 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
7. 7.True or false: a medicine dropper works by magnetism. (a) True (b) False
8. 8.⚖️ 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 way we turn it (b) whether the card stays (c) how full the glass is (d) the same glass
9. 9.True or false: a glass of water is not needed for the card-on-a-glass trick. (a) True (b) False
10. 10.🧺 Do we need turmeric powder for the card-on-a-glass trick? (a) needed (b) not needed
11. 11.🧺 Do we need a towel for the card-on-a-glass trick? (a) needed (b) not needed
12. 12.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) yeast (c) a stiff postcard (d) a towel
13. 13.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a stiff postcard (c) a sink or a bucket (d) a mirror
14. 14.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a magnetic pin holder (c) a drinking straw (d) a compass needle
15. 15.True or false: a sink or a bucket is not needed for the card-on-a-glass trick. (a) False (b) True
16. 16.🥛 Which of these works by air pressure? (a) a magnetic chess set (b) a fridge magnet (c) a magnetic pin holder (d) a suction hook
17. 17.True or false: a bicycle pump works by air pressure. (a) False (b) True
18. 18.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same glass is kept the same. (a) True (b) False
19. 19.🔮 Why do we try the card trick over a sink or a bucket? (a) to grow plants (b) to catch any spills (c) to cool the glass (d) to make it rain
20. 20.⚖️ 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 change it (b) we keep it the same (c) we measure it
21. 21.🔍 Which is the odd one out? (a) a compass needle (b) a magnetic chess set (c) a magnetic pin holder (d) a suction hook
22. 22.⚖️ 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
23. 23.🔍 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
24. 24.⚖️ 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
25. 25.⚖️ 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 the one thing we change. (a) True (b) False
26. 26.True or false: a magnetic pin holder works by magnetism. (a) False (b) True
27. 27.🛟 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
28. 28.🥛 What holds the card up against the upside-down glass? (a) a magnet (b) glue on the card (c) air pushing up (d) the cold water
29. 29.🧺 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 towel (c) a stiff postcard (d) turmeric powder
30. 30.🧺 Which of these is needed for the card-on-a-glass trick? (a) a magnet (b) a towel (c) a balloon (d) a battery cell
31. 31.True or false: a battery cell is not needed for the card-on-a-glass trick. (a) True (b) False
32. 32.🔍 Which is the odd one out? (a) a magnetic chess set (b) a compass needle (c) a magnetic pin holder (d) a vacuum cleaner
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 battery cell (c) a glass of water (d) a towel
34. 34.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a magnetic chess set (c) a vacuum cleaner (d) a compass needle
35. 35.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) not needed (b) needed
36. 36.🔮 Predict: you blow up a balloon. What fills it? (a) water (b) sand (c) air (d) smoke
37. 37.🧺 Which of these is needed for the card-on-a-glass trick? (a) a balloon (b) a battery cell (c) turmeric powder (d) a stiff postcard
38. 38.🔍 Which is the odd one out? (a) a magnetic pin holder (b) a magnetic chess set (c) a medicine dropper (d) a fridge magnet
39. 39.🛟 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
40. 40.🧺 Which of these is needed for the card-on-a-glass trick? (a) a mirror (b) a magnet (c) a glass of water (d) a battery cell

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