Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 81 · 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.True or false: a magnetic pin holder works by magnetism. (a) False (b) True
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) the way we turn it (d) the same glass
3. 3.🥛 Which of these works by air pressure? (a) a magnetic pin holder (b) a compass needle (c) a medicine dropper (d) a fridge magnet
4. 4.🧺 Do we need a towel for the card-on-a-glass trick? (a) needed (b) not needed
5. 5.True or false: a compass needle works by magnetism. (a) True (b) False
6. 6.True or false: a suction hook works by air pressure. (a) True (b) False
7. 7.⚖️ 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
8. 8.⚖️ 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) False (b) True
9. 9.True or false: a sink or a bucket is not needed for the card-on-a-glass trick. (a) False (b) True
10. 10.True or false: a mirror is not needed for the card-on-a-glass trick. (a) False (b) True
11. 11.⚖️ 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 way we turn it (c) whether the card stays (d) the same glass
12. 12.🧺 Do we need turmeric powder for the card-on-a-glass trick? (a) needed (b) not needed
13. 13.🧺 Do we need a battery cell for the card-on-a-glass trick? (a) not needed (b) needed
14. 14.🔮 Why do we try the card trick over a sink or a bucket? (a) to cool the glass (b) to grow plants (c) to make it rain (d) to catch any spills
15. 15.🧺 Which of these is needed for the card-on-a-glass trick? (a) a magnet (b) a balloon (c) yeast (d) a stiff postcard
16. 16.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the cap is sticky (b) the bottle is magnetic (c) air inside pushes back (d) water is hiding there
17. 17.🥛 Does a medicine dropper work by air pressure or by magnetism? (a) magnetism (b) air pressure
18. 18.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) not needed (b) needed
19. 19.⚖️ 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 keep it the same (c) we change it
20. 20.🥛 Which of these works by magnetism? (a) a suction hook (b) a drinking straw (c) a fridge magnet (d) a vacuum cleaner
21. 21.🧺 Which of these is needed for the card-on-a-glass trick? (a) a mirror (b) a glass of water (c) yeast (d) turmeric powder
22. 22.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) not needed (b) needed
23. 23.🔍 Which is the odd one out? (a) a vacuum cleaner (b) a bicycle pump (c) a magnetic pin holder (d) a medicine dropper
24. 24.🧺 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 mirror (d) a glass of water
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) how full the glass is (b) whether the card stays (c) the way we turn it
26. 26.🥛 Which of these works by magnetism? (a) a magnetic pin holder (b) a drinking straw (c) a medicine dropper (d) a bicycle pump
27. 27.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is hotter (b) it is magnetic (c) it will not break (d) it is heavier
28. 28.⚖️ 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
29. 29.🔍 Which is the odd one out? (a) a suction hook (b) a magnetic chess set (c) a bicycle pump (d) a drinking straw
30. 30.🔍 Which is the odd one out? (a) a medicine dropper (b) a vacuum cleaner (c) a fridge magnet (d) a bicycle pump
31. 31.🥛 Which of these works by magnetism? (a) a bicycle pump (b) a drinking straw (c) a medicine dropper (d) a compass needle
32. 32.⚖️ 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 what we measure. (a) True (b) False
33. 33.🧺 Do we need a balloon for the card-on-a-glass trick? (a) needed (b) not needed
34. 34.🧺 Do we need a mirror for the card-on-a-glass trick? (a) needed (b) not needed
35. 35.🧺 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) a battery cell (d) a towel
36. 36.🥛 What holds the card up against the upside-down glass? (a) the cold water (b) a magnet (c) air pushing up (d) glue on the card
37. 37.🧺 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 magnet (d) a towel
38. 38.True or false: a magnet is needed for the card-on-a-glass trick. (a) True (b) False
39. 39.⚖️ 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
40. 40.🛟 Where should you do the card-and-glass trick? (a) over a laptop (b) on a bed (c) over a sink or bucket (d) near a plug point

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