Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 131 · 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? True or false: the same glass is the one thing we change. (a) True (b) False
2. 2.🔍 Which is the odd one out? (a) a magnetic chess set (b) a medicine dropper (c) a compass needle (d) a fridge magnet
3. 3.🧺 Do we need a mirror for the card-on-a-glass trick? (a) not needed (b) needed
4. 4.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a stiff postcard (b) a sink or a bucket (c) a mirror (d) a glass of water
5. 5.🛟 Where should you do the card-and-glass trick? (a) over a sink or bucket (b) near a plug point (c) on a bed (d) over a laptop
6. 6.🥛 Which of these works by magnetism? (a) a suction hook (b) a medicine dropper (c) a fridge magnet (d) a vacuum cleaner
7. 7.🧺 Which of these is needed for the card-on-a-glass trick? (a) a towel (b) a magnet (c) a balloon (d) a mirror
8. 8.🧺 Do we need a magnet for the card-on-a-glass trick? (a) needed (b) not needed
9. 9.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a stiff postcard (b) a glass of water (c) a sink or a bucket (d) a magnet
10. 10.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a balloon (b) a towel (c) a glass of water (d) a stiff postcard
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 stiff postcard (c) a balloon (d) a towel
12. 12.⚖️ 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) the way we turn it (b) the same glass (c) how full the glass is (d) whether the card stays
13. 13.🥛 What holds the card up against the upside-down glass? (a) a magnet (b) glue on the card (c) air pushing up (d) the cold water
14. 14.🧺 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 battery cell (d) a glass of water
15. 15.🥛 Does a bicycle pump work by air pressure or by magnetism? (a) air pressure (b) magnetism
16. 16.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) water is hiding there (b) air inside pushes back (c) the bottle is magnetic (d) the cap is sticky
17. 17.🔮 Predict: you blow up a balloon. What fills it? (a) sand (b) water (c) air (d) smoke
18. 18.🥛 Does a suction hook work by air pressure or by magnetism? (a) air pressure (b) magnetism
19. 19.🥛 Which of these works by air pressure? (a) a compass needle (b) a fridge magnet (c) a magnetic pin holder (d) a suction hook
20. 20.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a sink or a bucket (b) yeast (c) a glass of water (d) a stiff postcard
21. 21.🔮 Why do we try the card trick over a sink or a bucket? (a) to grow plants (b) to cool the glass (c) to make it rain (d) to catch any spills
22. 22.⚖️ 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
23. 23.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is magnetic (b) it will not break (c) it is hotter (d) it is heavier
24. 24.🔍 Which is the odd one out? (a) a vacuum cleaner (b) a suction hook (c) a magnetic pin holder (d) a drinking straw
25. 25.🧺 Do we need yeast for the card-on-a-glass trick? (a) needed (b) not needed
26. 26.⚖️ 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 the one thing we change. (a) False (b) True
27. 27.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) a battery cell (c) a towel (d) a stiff postcard
28. 28.⚖️ 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
29. 29.🔍 Which is the odd one out? (a) a suction hook (b) a drinking straw (c) a bicycle pump (d) a magnetic chess set
30. 30.🧺 Do we need a battery cell for the card-on-a-glass trick? (a) needed (b) not needed
31. 31.⚖️ 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 keep it the same (b) we change it (c) we measure it
32. 32.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) not needed (b) needed
33. 33.True or false: a vacuum cleaner works by magnetism. (a) True (b) False
34. 34.True or false: a magnetic pin holder works by magnetism. (a) False (b) True
35. 35.True or false: a magnet is needed for the card-on-a-glass trick. (a) False (b) True
36. 36.🥛 Which of these works by air pressure? (a) a magnetic chess set (b) a drinking straw (c) a compass needle (d) a fridge magnet
37. 37.True or false: a glass of water is needed for the card-on-a-glass trick. (a) False (b) True
38. 38.True or false: a mirror is not needed for the card-on-a-glass trick. (a) False (b) True
39. 39.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a stiff postcard (b) a glass of water (c) turmeric powder (d) a sink or a bucket
40. 40.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a sink or a bucket (c) a glass of water (d) a magnet

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