Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 226 · 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 stiff postcard (b) a glass of water (c) a towel (d) yeast
2. 2.🧺 Do we need a magnet for the card-on-a-glass trick? (a) not needed (b) needed
3. 3.🧺 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 glass of water (d) a battery cell
4. 4.🧺 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 balloon
5. 5.🧺 Which of these is needed for the card-on-a-glass trick? (a) a mirror (b) a balloon (c) yeast (d) a towel
6. 6.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the water turns to ice (b) the card flies away (c) the card stays on (d) the glass breaks
7. 7.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) not needed (b) needed
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) how full the glass is (b) the same glass (c) whether the card stays (d) the same card
9. 9.True or false: a magnetic pin holder works by magnetism. (a) False (b) True
10. 10.🥛 Which of these works by air pressure? (a) a medicine dropper (b) a fridge magnet (c) a compass needle (d) a magnetic chess set
11. 11.⚖️ 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 same card
12. 12.🧺 Which of these is needed for the card-on-a-glass trick? (a) a mirror (b) turmeric powder (c) a stiff postcard (d) a magnet
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 magnet (c) a sink or a bucket (d) a towel
14. 14.🥛 Does a medicine dropper work by air pressure or by magnetism? (a) magnetism (b) air pressure
15. 15.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a towel (b) a balloon (c) a stiff postcard (d) a glass of water
16. 16.🔍 Which is the odd one out? (a) a vacuum cleaner (b) a suction hook (c) a fridge magnet (d) a drinking straw
17. 17.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is magnetic (b) it is hotter (c) it will not break (d) it is heavier
18. 18.🥛 Which of these works by air pressure? (a) a suction hook (b) a magnetic chess set (c) a fridge magnet (d) a compass needle
19. 19.🔮 Why do we try the card trick over a sink or a bucket? (a) to catch any spills (b) to cool the glass (c) to make it rain (d) to grow plants
20. 20.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) water is hiding there (b) the bottle is magnetic (c) air inside pushes back (d) the cap is sticky
21. 21.🧺 Do we need a balloon for the card-on-a-glass trick? (a) not needed (b) needed
22. 22.🥛 Does a drinking straw work by air pressure or by magnetism? (a) magnetism (b) air pressure
23. 23.📘 Air presses on everything around us. What is this push called? (a) magnetism (b) air pressure (c) sunlight (d) friction
24. 24.🛟 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
25. 25.🥛 Which of these works by magnetism? (a) a compass needle (b) a vacuum cleaner (c) a drinking straw (d) a medicine dropper
26. 26.🧺 Do we need a towel for the card-on-a-glass trick? (a) needed (b) not needed
27. 27.⚖️ 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) how full the glass is (c) whether the card stays
28. 28.🔍 Which is the odd one out? (a) a medicine dropper (b) a magnetic pin holder (c) a fridge magnet (d) a magnetic chess set
29. 29.🥛 Does a fridge magnet work by air pressure or by magnetism? (a) magnetism (b) air pressure
30. 30.🔮 Predict: you blow up a balloon. What fills it? (a) smoke (b) water (c) air (d) sand
31. 31.🥛 Does a magnetic pin holder work by air pressure or by magnetism? (a) air pressure (b) magnetism
32. 32.⚖️ 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 keep it the same (c) we change it
33. 33.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) needed (b) not needed
34. 34.⚖️ 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) True (b) False
35. 35.🥛 Does a bicycle pump work by air pressure or by magnetism? (a) magnetism (b) air pressure
36. 36.True or false: a stiff postcard is needed for the card-on-a-glass trick. (a) False (b) True
37. 37.True or false: a towel is needed for the card-on-a-glass trick. (a) False (b) True
38. 38.🔍 Which is the odd one out? (a) a compass needle (b) a fridge magnet (c) a drinking straw (d) a magnetic chess set
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 card”? (a) we keep it the same (b) we measure it (c) we change it
40. 40.🧺 Do we need yeast for the card-on-a-glass trick? (a) needed (b) not needed

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