Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 153 · 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.🔮 Predict: you blow up a balloon. What fills it? (a) water (b) air (c) smoke (d) sand
2. 2.⚖️ 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) how full the glass is (c) the same glass
3. 3.🥛 Does a magnetic pin holder work by air pressure or by magnetism? (a) magnetism (b) air pressure
4. 4.🔍 Which is the odd one out? (a) a vacuum cleaner (b) a fridge magnet (c) a bicycle pump (d) a suction hook
5. 5.🧺 Do we need a towel for the card-on-a-glass trick? (a) not needed (b) needed
6. 6.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a towel (c) a magnet (d) a sink or a bucket
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 same card”? (a) we change it (b) we measure it (c) we keep it the same
8. 8.🧺 Do we need a balloon for the card-on-a-glass trick? (a) not needed (b) needed
9. 9.True or false: turmeric powder is needed for the card-on-a-glass trick. (a) False (b) True
10. 10.🔍 Which is the odd one out? (a) a magnetic pin holder (b) a fridge magnet (c) a compass needle (d) a drinking straw
11. 11.True or false: a magnet is needed for the card-on-a-glass trick. (a) True (b) False
12. 12.🔍 Which is the odd one out? (a) a suction hook (b) a vacuum cleaner (c) a medicine dropper (d) a magnetic chess set
13. 13.🧺 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 sink or a bucket
14. 14.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a towel (c) a sink or a bucket (d) yeast
15. 15.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a drinking straw (c) a compass needle (d) a magnetic pin holder
16. 16.⚖️ 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 glass (b) the same card (c) how full the glass is (d) the way we turn it
17. 17.True or false: a stiff postcard is not needed for the card-on-a-glass trick. (a) False (b) True
18. 18.⚖️ 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 measure it (b) we change it (c) we keep it the same
19. 19.🔍 Which is the odd one out? (a) a magnetic chess set (b) a compass needle (c) a medicine dropper (d) a magnetic pin holder
20. 20.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is magnetic (b) it is heavier (c) it is hotter (d) it will not break
21. 21.🛟 Where should you do the card-and-glass trick? (a) over a laptop (b) near a plug point (c) on a bed (d) over a sink or bucket
22. 22.🔮 Why do we try the card trick over a sink or a bucket? (a) to catch any spills (b) to grow plants (c) to make it rain (d) to cool the glass
23. 23.⚖️ 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
24. 24.🥛 What holds the card up against the upside-down glass? (a) a magnet (b) glue on the card (c) the cold water (d) air pushing up
25. 25.True or false: a compass needle works by air pressure. (a) False (b) True
26. 26.🥛 Which of these works by magnetism? (a) a suction hook (b) a drinking straw (c) a fridge magnet (d) a vacuum cleaner
27. 27.🔍 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 water turns to ice (c) the card flies away (d) the glass breaks
28. 28.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) not needed (b) needed
29. 29.🧺 Which of these is needed for the card-on-a-glass trick? (a) a towel (b) a battery cell (c) a magnet (d) a mirror
30. 30.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) water is hiding there (b) the cap is sticky (c) air inside pushes back (d) the bottle is magnetic
31. 31.🥛 Which of these works by air pressure? (a) a medicine dropper (b) a magnetic chess set (c) a fridge magnet (d) a magnetic pin holder
32. 32.⚖️ 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) how full the glass is (c) the same card
33. 33.🔍 Which is the odd one out? (a) a suction hook (b) a vacuum cleaner (c) a drinking straw (d) a magnetic pin holder
34. 34.🧺 Do we need turmeric powder for the card-on-a-glass trick? (a) not needed (b) needed
35. 35.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) turmeric powder (c) a sink or a bucket (d) a towel
36. 36.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) a stiff postcard (c) a sink or a bucket (d) a balloon
37. 37.⚖️ 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 measure it (b) we change it (c) we keep it the same
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 what we measure. (a) True (b) False
39. 39.⚖️ 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) False (b) True
40. 40.🥛 Does a drinking straw work by air pressure or by magnetism? (a) air pressure (b) magnetism

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