Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 774 · 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.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a compass needle (c) a vacuum cleaner (d) a magnetic pin holder
2. 2.🔍 Which is the odd one out? (a) a compass needle (b) a magnetic chess set (c) a drinking straw (d) a fridge magnet
3. 3.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) air inside pushes back (b) the bottle is magnetic (c) water is hiding there (d) the cap is sticky
4. 4.⚖️ 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) whether the card stays (b) the same glass (c) the same card (d) how full the glass is
5. 5.🧺 Which of these is needed for the card-on-a-glass trick? (a) a glass of water (b) turmeric powder (c) a battery cell (d) a balloon
6. 6.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) a sink or a bucket (c) a towel (d) a magnet
7. 7.⚖️ 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
8. 8.🔍 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 water turns to ice (d) the card flies away
9. 9.🧺 Do we need a balloon for the card-on-a-glass trick? (a) needed (b) not needed
10. 10.🔍 Which is the odd one out? (a) a bicycle pump (b) a drinking straw (c) a fridge magnet (d) a suction hook
11. 11.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a sink or a bucket (c) yeast (d) a stiff postcard
12. 12.🧺 Do we need a towel for the card-on-a-glass trick? (a) needed (b) not needed
13. 13.🛟 Where should you do the card-and-glass trick? (a) on a bed (b) near a plug point (c) over a sink or bucket (d) over a laptop
14. 14.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) a mirror (c) a glass of water (d) a stiff postcard
15. 15.🔮 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
16. 16.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is heavier (b) it is hotter (c) it will not break (d) it is magnetic
17. 17.🔍 Which is the odd one out? (a) a bicycle pump (b) a suction hook (c) a drinking straw (d) a compass needle
18. 18.True or false: a sink or a bucket is needed for the card-on-a-glass trick. (a) True (b) False
19. 19.True or false: a sink or a bucket is not needed for the card-on-a-glass trick. (a) False (b) True
20. 20.True or false: a glass of water is needed for the card-on-a-glass trick. (a) False (b) True
21. 21.🔍 Which is the odd one out? (a) a compass needle (b) a fridge magnet (c) a bicycle pump (d) a magnetic chess set
22. 22.🔮 Predict: you blow up a balloon. What fills it? (a) sand (b) smoke (c) air (d) water
23. 23.🥛 Does a vacuum cleaner work by air pressure or by magnetism? (a) magnetism (b) air pressure
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 balloon (c) a stiff postcard (d) a glass of water
25. 25.🧺 Do we need a magnet for the card-on-a-glass trick? (a) not needed (b) needed
26. 26.True or false: a drinking straw works by air pressure. (a) True (b) False
27. 27.🧺 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 stiff postcard (d) a towel
28. 28.True or false: a suction hook works by magnetism. (a) False (b) True
29. 29.🥛 Why is it best to fill the glass right to the top? (a) water is heavier (b) it looks nicer (c) the card gets wet (d) little air left inside
30. 30.True or false: a vacuum cleaner works by magnetism. (a) False (b) True
31. 31.🧺 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 sink or a bucket
32. 32.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a mirror (b) a towel (c) a sink or a bucket (d) a stiff postcard
33. 33.🥤 Why does juice go up a drinking straw when you sip? (a) the straw is magnetic (b) juice likes plastic (c) air pushes it up (d) the straw is hot
34. 34.True or false: a magnet is not needed for the card-on-a-glass trick. (a) False (b) True
35. 35.🥛 Does a fridge magnet work by air pressure or by magnetism? (a) air pressure (b) magnetism
36. 36.True or false: a drinking straw works by magnetism. (a) True (b) False
37. 37.🥛 What holds the card up against the upside-down glass? (a) a magnet (b) air pushing up (c) glue on the card (d) the cold water
38. 38.🔍 Which is the odd one out? (a) a magnetic pin holder (b) a drinking straw (c) a medicine dropper (d) a bicycle pump
39. 39.🔍 Which is the odd one out? (a) a magnetic pin holder (b) a fridge magnet (c) a magnetic chess set (d) a suction hook
40. 40.⚖️ 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

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