Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 642 · 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 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 bottle is magnetic (d) the cap is sticky
2. 2.⚖️ 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
3. 3.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a towel (b) a sink or a bucket (c) a glass of water (d) a battery cell
4. 4.🔍 Which is the odd one out? (a) a vacuum cleaner (b) a medicine dropper (c) a compass needle (d) a suction hook
5. 5.🥛 Does a suction hook work by air pressure or by magnetism? (a) magnetism (b) air pressure
6. 6.True or false: a drinking straw works by magnetism. (a) True (b) False
7. 7.🛟 Where should you do the card-and-glass trick? (a) near a plug point (b) on a bed (c) over a sink or bucket (d) over a laptop
8. 8.🧺 Which of these is needed for the card-on-a-glass trick? (a) a glass of water (b) a mirror (c) a magnet (d) a balloon
9. 9.🔍 Which is the odd one out? (a) a fridge magnet (b) a magnetic chess set (c) a compass needle (d) a vacuum cleaner
10. 10.🥛 Which of these works by magnetism? (a) a fridge magnet (b) a suction hook (c) a vacuum cleaner (d) a drinking straw
11. 11.⚖️ 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 glass (c) whether the card stays
12. 12.True or false: a medicine dropper works by magnetism. (a) True (b) False
13. 13.🥛 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
14. 14.🥛 Why is it best to fill the glass right to the top? (a) the card gets wet (b) water is heavier (c) little air left inside (d) it looks nicer
15. 15.🧺 Do we need a mirror for the card-on-a-glass trick? (a) needed (b) not needed
16. 16.🧺 Which of these is needed for the card-on-a-glass trick? (a) turmeric powder (b) yeast (c) a battery cell (d) a stiff postcard
17. 17.🥤 Why does juice go up a drinking straw when you sip? (a) the straw is hot (b) air pushes it up (c) juice likes plastic (d) the straw is magnetic
18. 18.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a battery cell (c) a stiff postcard (d) a towel
19. 19.True or false: a suction hook works by magnetism. (a) True (b) False
20. 20.🛟 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
21. 21.🔮 Predict: you blow up a balloon. What fills it? (a) smoke (b) air (c) water (d) sand
22. 22.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a magnetic pin holder (c) a vacuum cleaner (d) a magnetic chess set
23. 23.True or false: a glass of water is needed for the card-on-a-glass trick. (a) False (b) True
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 magnet (c) a glass of water (d) a towel
25. 25.🧺 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) turmeric powder (d) a sink or a bucket
26. 26.True or false: a compass needle works by air pressure. (a) False (b) True
27. 27.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) needed (b) not needed
28. 28.📘 Air presses on everything around us. What is this push called? (a) magnetism (b) friction (c) sunlight (d) air pressure
29. 29.🥛 Which of these works by air pressure? (a) a magnetic chess set (b) a magnetic pin holder (c) a compass needle (d) a suction hook
30. 30.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same card is the one thing we change. (a) False (b) True
31. 31.True or false: a medicine dropper works by air pressure. (a) True (b) False
32. 32.⚖️ 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
33. 33.🔍 Which is the odd one out? (a) a magnetic chess set (b) a drinking straw (c) a suction hook (d) a vacuum cleaner
34. 34.🥛 Which of these works by magnetism? (a) a magnetic pin holder (b) a suction hook (c) a bicycle pump (d) a medicine dropper
35. 35.⚖️ 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) whether the card stays (b) how full the glass is (c) the way we turn it (d) the same card
36. 36.🔮 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 catch any spills (d) to grow plants
37. 37.⚖️ 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 change it (b) we keep it the same (c) we measure it
38. 38.True or false: a balloon is needed for the card-on-a-glass trick. (a) False (b) True
39. 39.True or false: a sink or a bucket is not needed for the card-on-a-glass trick. (a) False (b) True
40. 40.True or false: turmeric powder is needed for the card-on-a-glass trick. (a) True (b) False

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