Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 820 · 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.🔮 Predict: you blow up a balloon. What fills it? (a) air (b) smoke (c) water (d) sand
2. 2.🔍 Which is the odd one out? (a) a drinking straw (b) a magnetic pin holder (c) a medicine dropper (d) a bicycle pump
3. 3.🧺 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) yeast
4. 4.⚖️ 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) how full the glass is (b) the same card (c) whether the card stays
5. 5.True or false: a compass needle works by magnetism. (a) False (b) True
6. 6.🥛 Which of these works by air pressure? (a) a magnetic chess set (b) a vacuum cleaner (c) a magnetic pin holder (d) a fridge magnet
7. 7.⚖️ 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) False (b) True
8. 8.🧺 Which of these is needed for the card-on-a-glass trick? (a) a sink or a bucket (b) turmeric powder (c) yeast (d) a battery cell
9. 9.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) turmeric powder (c) a sink or a bucket (d) a towel
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 card”? (a) we keep it the same (b) we measure it (c) we change it
11. 11.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is magnetic (b) it is heavier (c) it is hotter (d) it will not break
12. 12.🔍 Which is the odd one out? (a) a magnetic chess set (b) a magnetic pin holder (c) a compass needle (d) a medicine dropper
13. 13.🥤 Why does juice go up a drinking straw when you sip? (a) the straw is hot (b) juice likes plastic (c) the straw is magnetic (d) air pushes it up
14. 14.🧺 Do we need a magnet for the card-on-a-glass trick? (a) not needed (b) needed
15. 15.⚖️ 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) False (b) True
16. 16.🛟 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
17. 17.⚖️ 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
18. 18.True or false: a glass of water is not needed for the card-on-a-glass trick. (a) True (b) False
19. 19.🔍 Which is the odd one out? (a) a compass needle (b) a fridge magnet (c) a suction hook (d) a magnetic chess set
20. 20.🔮 Why do we try the card trick over a sink or a bucket? (a) to grow plants (b) to catch any spills (c) to make it rain (d) to cool the glass
21. 21.True or false: a towel is not needed for the card-on-a-glass trick. (a) True (b) False
22. 22.True or false: a suction hook works by magnetism. (a) True (b) False
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 towel (c) a glass of water (d) a battery cell
24. 24.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a battery cell (b) a towel (c) a glass of water (d) a stiff postcard
25. 25.🧺 Do we need a towel for the card-on-a-glass trick? (a) needed (b) not needed
26. 26.🧺 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 stiff postcard (d) a glass of water
27. 27.True or false: a bicycle pump works by magnetism. (a) True (b) False
28. 28.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) not needed (b) needed
29. 29.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) air inside pushes back (b) the bottle is magnetic (c) the cap is sticky (d) water is hiding there
30. 30.True or false: a battery cell is needed for the card-on-a-glass trick. (a) False (b) True
31. 31.🔍 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 glass breaks (c) the water turns to ice (d) the card stays on
32. 32.📘 Air presses on everything around us. What is this push called? (a) sunlight (b) friction (c) air pressure (d) magnetism
33. 33.🥛 Which of these works by magnetism? (a) a medicine dropper (b) a vacuum cleaner (c) a magnetic pin holder (d) a suction hook
34. 34.⚖️ 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) the same card (c) whether the card stays (d) the same glass
35. 35.🥛 Does a magnetic pin holder work by air pressure or by magnetism? (a) magnetism (b) air pressure
36. 36.🧺 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 magnet (d) a glass of water
37. 37.🧺 Do we need a battery cell for the card-on-a-glass trick? (a) not needed (b) needed
38. 38.🥛 Does a drinking straw work by air pressure or by magnetism? (a) air pressure (b) magnetism
39. 39.⚖️ 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 card (b) the same glass (c) the way we turn it (d) how full the glass is
40. 40.True or false: turmeric powder is needed for the card-on-a-glass trick. (a) True (b) False

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