Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 767 · 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 magnetism? (a) a magnetic pin holder (b) a medicine dropper (c) a suction hook (d) a drinking straw
2. 2.🔍 Which is the odd one out? (a) a magnetic pin holder (b) a magnetic chess set (c) a compass needle (d) a suction hook
3. 3.True or false: a sink or a bucket is needed for the card-on-a-glass trick. (a) False (b) True
4. 4.🥛 Which of these works by magnetism? (a) a suction hook (b) a drinking straw (c) a medicine dropper (d) a fridge magnet
5. 5.🛟 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
6. 6.🧺 Which of these is needed for the card-on-a-glass trick? (a) a mirror (b) a balloon (c) a stiff postcard (d) a battery cell
7. 7.True or false: a glass of water is not needed for the card-on-a-glass trick. (a) False (b) True
8. 8.⚖️ 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) True (b) False
9. 9.🥛 Does a magnetic chess set work by air pressure or by magnetism? (a) air pressure (b) magnetism
10. 10.True or false: a bicycle pump works by air pressure. (a) True (b) False
11. 11.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “the way we turn it”? (a) we measure it (b) we keep it the same (c) we change it
12. 12.🧺 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 glass of water (d) a towel
13. 13.⚖️ 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 kept the same. (a) True (b) False
14. 14.🔮 Why do we try the card trick over a sink or a bucket? (a) to make it rain (b) to cool the glass (c) to grow plants (d) to catch any spills
15. 15.⚖️ 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) whether the card stays (c) the way we turn it (d) the same card
16. 16.🧺 Do we need a battery cell for the card-on-a-glass trick? (a) not needed (b) needed
17. 17.🧺 Which of these is needed for the card-on-a-glass trick? (a) a mirror (b) a glass of water (c) turmeric powder (d) a balloon
18. 18.True or false: a mirror is needed for the card-on-a-glass trick. (a) False (b) True
19. 19.⚖️ 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 keep it the same (c) we measure it
20. 20.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a suction hook (c) a magnetic chess set (d) a compass needle
21. 21.🥛 What holds the card up against the upside-down glass? (a) the cold water (b) air pushing up (c) a magnet (d) glue on the card
22. 22.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a towel (c) a battery cell (d) a stiff postcard
23. 23.True or false: a compass needle works by air pressure. (a) True (b) False
24. 24.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a mirror (c) a sink or a bucket (d) a glass of water
25. 25.True or false: a magnetic chess set works by air pressure. (a) False (b) True
26. 26.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) a towel (c) a sink or a bucket (d) a balloon
27. 27.True or false: a balloon is needed for the card-on-a-glass trick. (a) True (b) False
28. 28.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the bottle is magnetic (b) air inside pushes back (c) the cap is sticky (d) water is hiding there
29. 29.🥛 Does a fridge magnet work by air pressure or by magnetism? (a) air pressure (b) magnetism
30. 30.🥛 Does a vacuum cleaner work by air pressure or by magnetism? (a) magnetism (b) air pressure
31. 31.True or false: a magnet is needed for the card-on-a-glass trick. (a) True (b) False
32. 32.True or false: yeast is not needed for the card-on-a-glass trick. (a) True (b) False
33. 33.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a stiff postcard (b) a magnet (c) a sink or a bucket (d) a towel
34. 34.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a magnetic pin holder (c) a drinking straw (d) a magnetic chess set
35. 35.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the card flies away (b) the card stays on (c) the water turns to ice (d) the glass breaks
36. 36.⚖️ 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 measure it (c) we keep it the same
37. 37.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) not needed (b) needed
38. 38.⚖️ 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 change it (c) we keep it the same
39. 39.🥛 Why is it best to fill the glass right to the top? (a) water is heavier (b) the card gets wet (c) little air left inside (d) it looks nicer
40. 40.🧺 Do we need a towel for the card-on-a-glass trick? (a) not needed (b) needed

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