Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 915 · 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 is the odd one out? (a) a suction hook (b) a drinking straw (c) a compass needle (d) a bicycle pump
2. 2.🥛 Does a magnetic pin holder work by air pressure or by magnetism? (a) air pressure (b) magnetism
3. 3.⚖️ 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) True (b) False
4. 4.🧺 Do we need yeast for the card-on-a-glass trick? (a) not needed (b) needed
5. 5.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a medicine dropper (c) a compass needle (d) a magnetic chess set
6. 6.🔍 Which is the odd one out? (a) a drinking straw (b) a fridge magnet (c) a magnetic chess set (d) a compass needle
7. 7.True or false: a balloon is not needed for the card-on-a-glass trick. (a) True (b) False
8. 8.True or false: a sink or a bucket is needed for the card-on-a-glass trick. (a) False (b) True
9. 9.🛟 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 heavier (d) it is hotter
10. 10.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) needed (b) not needed
11. 11.True or false: a mirror is not needed for the card-on-a-glass trick. (a) False (b) True
12. 12.⚖️ 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
13. 13.🥤 Why does juice go up a drinking straw when you sip? (a) the straw is hot (b) the straw is magnetic (c) juice likes plastic (d) air pushes it up
14. 14.🔍 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 card flies away (c) the glass breaks (d) the water turns to ice
15. 15.🥛 Does a drinking straw work by air pressure or by magnetism? (a) magnetism (b) air pressure
16. 16.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) a glass of water (c) a mirror (d) a stiff postcard
17. 17.🔍 Which is the odd one out? (a) a suction hook (b) a magnetic chess set (c) a magnetic pin holder (d) a fridge magnet
18. 18.⚖️ 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 measure it (b) we keep it the same (c) we change it
19. 19.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a towel (c) a battery cell (d) a glass of water
20. 20.True or false: a towel is not needed for the card-on-a-glass trick. (a) True (b) False
21. 21.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a stiff postcard (b) a glass of water (c) a towel (d) a magnet
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 what we measure. (a) False (b) True
23. 23.🧺 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 magnet (c) a towel (d) a glass of water
24. 24.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “whether the card stays”? (a) we change it (b) we keep it the same (c) we measure it
25. 25.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) yeast (b) a sink or a bucket (c) a glass of water (d) a towel
26. 26.🥛 Which of these works by air pressure? (a) a magnetic pin holder (b) a fridge magnet (c) a compass needle (d) a vacuum cleaner
27. 27.🥛 Does a suction hook work by air pressure or by magnetism? (a) air pressure (b) magnetism
28. 28.⚖️ 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 what we measure. (a) False (b) True
29. 29.True or false: yeast is needed for the card-on-a-glass trick. (a) True (b) False
30. 30.🧺 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
31. 31.🧺 Do we need a mirror for the card-on-a-glass trick? (a) not needed (b) needed
32. 32.🥛 What holds the card up against the upside-down glass? (a) air pushing up (b) the cold water (c) a magnet (d) glue on the card
33. 33.⚖️ 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 same glass (b) the way we turn it (c) whether the card stays (d) how full the glass is
34. 34.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a towel (b) turmeric powder (c) a glass of water (d) a sink or a bucket
35. 35.True or false: a drinking straw works by magnetism. (a) True (b) False
36. 36.🥛 Which of these works by magnetism? (a) a compass needle (b) a drinking straw (c) a medicine dropper (d) a suction hook
37. 37.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) air inside pushes back (b) water is hiding there (c) the cap is sticky (d) the bottle is magnetic
38. 38.🧺 Which of these is needed for the card-on-a-glass trick? (a) yeast (b) a mirror (c) a balloon (d) a stiff postcard
39. 39.True or false: a bicycle pump works by magnetism. (a) True (b) False
40. 40.🛟 Where should you do the card-and-glass trick? (a) near a plug point (b) over a sink or bucket (c) on a bed (d) over a laptop

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