Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 916 · 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 vacuum cleaner works by air pressure. (a) True (b) False
2. 2.⚖️ 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) True (b) False
3. 3.🧺 Which of these is needed for the card-on-a-glass trick? (a) a balloon (b) turmeric powder (c) a battery cell (d) a glass of water
4. 4.🥛 Does a magnetic chess set work by air pressure or by magnetism? (a) magnetism (b) air pressure
5. 5.🔍 Which is the odd one out? (a) a magnetic chess set (b) a compass needle (c) a fridge magnet (d) a medicine dropper
6. 6.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same glass is what we measure. (a) True (b) False
7. 7.True or false: a bicycle pump works by air pressure. (a) False (b) True
8. 8.True or false: a compass needle works by air pressure. (a) False (b) True
9. 9.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) needed (b) not needed
10. 10.⚖️ 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
11. 11.True or false: a suction hook works by air pressure. (a) True (b) False
12. 12.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a sink or a bucket (b) turmeric powder (c) a towel (d) a glass of water
13. 13.🧺 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 battery cell (d) a towel
14. 14.🧺 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 battery cell (d) a towel
15. 15.🧺 Do we need a battery cell for the card-on-a-glass trick? (a) needed (b) not needed
16. 16.🥛 Which of these works by magnetism? (a) a medicine dropper (b) a compass needle (c) a drinking straw (d) a bicycle pump
17. 17.🛟 Where should you do the card-and-glass trick? (a) on a bed (b) over a sink or bucket (c) over a laptop (d) near a plug point
18. 18.🥤 Why does juice go up a drinking straw when you sip? (a) juice likes plastic (b) the straw is magnetic (c) the straw is hot (d) air pushes it up
19. 19.True or false: a towel is needed for the card-on-a-glass trick. (a) True (b) False
20. 20.⚖️ 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) whether the card stays (c) the same card (d) the same glass
21. 21.True or false: a magnet is needed for the card-on-a-glass trick. (a) False (b) True
22. 22.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) turmeric powder (c) a towel (d) a sink or a bucket
23. 23.True or false: a drinking straw works by air pressure. (a) False (b) True
24. 24.True or false: a fridge magnet works by air pressure. (a) False (b) True
25. 25.🥛 Which of these works by air pressure? (a) a magnetic pin holder (b) a magnetic chess set (c) a drinking straw (d) a compass needle
26. 26.⚖️ 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
27. 27.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the cap is sticky (b) water is hiding there (c) air inside pushes back (d) the bottle is magnetic
28. 28.🥛 Why is it best to fill the glass right to the top? (a) little air left inside (b) the card gets wet (c) water is heavier (d) it looks nicer
29. 29.🧺 Do we need a magnet for the card-on-a-glass trick? (a) not needed (b) needed
30. 30.🥛 Which of these works by magnetism? (a) a vacuum cleaner (b) a drinking straw (c) a bicycle pump (d) a magnetic pin holder
31. 31.⚖️ 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) how full the glass is (c) the same glass (d) the way we turn it
32. 32.True or false: a sink or a bucket is needed for the card-on-a-glass trick. (a) False (b) True
33. 33.🧺 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
34. 34.⚖️ 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
35. 35.🥛 Does a magnetic pin holder work by air pressure or by magnetism? (a) air pressure (b) magnetism
36. 36.🥛 What holds the card up against the upside-down glass? (a) air pushing up (b) a magnet (c) glue on the card (d) the cold water
37. 37.🔍 Which is the odd one out? (a) a magnetic chess set (b) a vacuum cleaner (c) a fridge magnet (d) a compass needle
38. 38.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is heavier (b) it is magnetic (c) it is hotter (d) it will not break
39. 39.True or false: a fridge magnet works by magnetism. (a) True (b) False
40. 40.🥛 Does a vacuum cleaner work by air pressure or by magnetism? (a) air pressure (b) magnetism

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