Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 74 · 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? 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
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) the cap is sticky (c) the bottle is magnetic (d) air inside pushes back
3. 3.🔮 Predict: you blow up a balloon. What fills it? (a) smoke (b) air (c) sand (d) water
4. 4.🔮 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
5. 5.⚖️ 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 what we measure. (a) False (b) True
6. 6.🧺 Which of these is needed for the card-on-a-glass trick? (a) a balloon (b) yeast (c) a glass of water (d) a mirror
7. 7.True or false: a suction hook works by air pressure. (a) True (b) False
8. 8.🧺 Do we need a towel for the card-on-a-glass trick? (a) not needed (b) needed
9. 9.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is magnetic (b) it is heavier (c) it will not break (d) it is hotter
10. 10.🔍 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
11. 11.🧺 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
12. 12.🥛 Which of these works by magnetism? (a) a bicycle pump (b) a vacuum cleaner (c) a magnetic pin holder (d) a drinking straw
13. 13.🥛 Does a drinking straw work by air pressure or by magnetism? (a) air pressure (b) magnetism
14. 14.🧺 Do we need a magnet for the card-on-a-glass trick? (a) not needed (b) needed
15. 15.🥛 Which of these works by magnetism? (a) a suction hook (b) a fridge magnet (c) a medicine dropper (d) a bicycle pump
16. 16.True or false: turmeric powder is not needed for the card-on-a-glass trick. (a) False (b) True
17. 17.🧺 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 glass of water
18. 18.🥛 Does a vacuum cleaner work by air pressure or by magnetism? (a) magnetism (b) air pressure
19. 19.⚖️ 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
20. 20.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a glass of water (c) a balloon (d) a stiff postcard
21. 21.True or false: a mirror is needed for the card-on-a-glass trick. (a) True (b) False
22. 22.⚖️ 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
23. 23.🔍 Which is the odd one out? (a) a fridge magnet (b) a magnetic chess set (c) a medicine dropper (d) a compass needle
24. 24.True or false: a vacuum cleaner works by air pressure. (a) True (b) False
25. 25.True or false: a fridge magnet works by magnetism. (a) False (b) True
26. 26.🧺 Which of these is not needed for the card-on-a-glass trick? (a) turmeric powder (b) a stiff postcard (c) a glass of water (d) a sink or a bucket
27. 27.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a mirror (b) a stiff postcard (c) a glass of water (d) a sink or a bucket
28. 28.⚖️ 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
29. 29.🥛 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
30. 30.True or false: a magnetic chess set works by air pressure. (a) False (b) True
31. 31.🛟 Where should you do the card-and-glass trick? (a) on a bed (b) over a laptop (c) near a plug point (d) over a sink or bucket
32. 32.🔍 Which is the odd one out? (a) a magnetic chess set (b) a fridge magnet (c) a vacuum cleaner (d) a compass needle
33. 33.True or false: a sink or a bucket is not needed for the card-on-a-glass trick. (a) True (b) False
34. 34.⚖️ 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 measure it (c) we keep it the same
35. 35.📘 Air presses on everything around us. What is this push called? (a) magnetism (b) sunlight (c) friction (d) air pressure
36. 36.⚖️ 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
37. 37.⚖️ 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 kept the same. (a) False (b) True
38. 38.⚖️ 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
39. 39.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a mirror (b) a stiff postcard (c) a sink or a bucket (d) a glass of water
40. 40.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) needed (b) not needed

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