Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 197 · 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.🧺 Do we need a balloon for the card-on-a-glass trick? (a) needed (b) not needed
2. 2.True or false: turmeric powder is not needed for the card-on-a-glass trick. (a) False (b) True
3. 3.🥛 Does a compass needle work by air pressure or by magnetism? (a) air pressure (b) magnetism
4. 4.🥛 What holds the card up against the upside-down glass? (a) glue on the card (b) air pushing up (c) a magnet (d) the cold water
5. 5.🧺 Which of these is needed for the card-on-a-glass trick? (a) a stiff postcard (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 towel (b) a battery cell (c) a sink or a bucket (d) a stiff postcard
7. 7.True or false: a fridge magnet works by air pressure. (a) False (b) True
8. 8.True or false: a medicine dropper works by magnetism. (a) False (b) True
9. 9.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? Which of these is kept the same? (a) whether the card stays (b) how full the glass is (c) the same card
10. 10.⚖️ 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
11. 11.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) yeast (c) a stiff postcard (d) a sink or a bucket
12. 12.🥛 Does a magnetic pin holder work by air pressure or by magnetism? (a) magnetism (b) air pressure
13. 13.🧺 Which of these is needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a magnet (c) turmeric powder (d) a mirror
14. 14.🛟 Where should you do the card-and-glass trick? (a) on a bed (b) over a sink or bucket (c) near a plug point (d) over a laptop
15. 15.🥛 Does a suction hook work by air pressure or by magnetism? (a) magnetism (b) air pressure
16. 16.⚖️ 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 change it (c) we keep it the same
17. 17.⚖️ 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 card (b) the same glass (c) whether the card stays (d) how full the glass is
18. 18.🧺 Do we need a mirror for the card-on-a-glass trick? (a) needed (b) not needed
19. 19.🥛 Which of these works by air pressure? (a) a compass needle (b) a magnetic pin holder (c) a magnetic chess set (d) a medicine dropper
20. 20.True or false: a magnetic pin holder works by air pressure. (a) False (b) True
21. 21.🧺 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 glass of water (d) a towel
22. 22.🥛 Does a drinking straw work by air pressure or by magnetism? (a) magnetism (b) air pressure
23. 23.🥛 Which of these works by air pressure? (a) a magnetic chess set (b) a fridge magnet (c) a vacuum cleaner (d) a compass needle
24. 24.🔮 Predict: you blow up a balloon. What fills it? (a) water (b) air (c) smoke (d) sand
25. 25.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the glass breaks (b) the card flies away (c) the water turns to ice (d) the card stays on
26. 26.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) water is hiding there (b) the cap is sticky (c) the bottle is magnetic (d) air inside pushes back
27. 27.True or false: a suction hook works by magnetism. (a) True (b) False
28. 28.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is hotter (b) it will not break (c) it is magnetic (d) it is heavier
29. 29.🧺 Do we need a battery cell for the card-on-a-glass trick? (a) not needed (b) needed
30. 30.⚖️ 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) False (b) True
31. 31.True or false: a battery cell is not needed for the card-on-a-glass trick. (a) False (b) True
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 mirror is needed for the card-on-a-glass trick. (a) True (b) False
34. 34.True or false: a bicycle pump works by air pressure. (a) True (b) False
35. 35.🔍 Which is the odd one out? (a) a magnetic chess set (b) a compass needle (c) a fridge magnet (d) a suction hook
36. 36.🧺 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) turmeric powder (d) a towel
37. 37.⚖️ 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) the same glass (b) how full the glass is (c) the same card (d) whether the card stays
38. 38.🔮 Why do we try the card trick over a sink or a bucket? (a) to make it rain (b) to catch any spills (c) to cool the glass (d) to grow plants
39. 39.🔍 Which is the odd one out? (a) a fridge magnet (b) a vacuum cleaner (c) a magnetic chess set (d) a magnetic pin holder
40. 40.🥛 Why is it best to fill the glass right to the top? (a) little air left inside (b) it looks nicer (c) water is heavier (d) the card gets wet

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