Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 394 · 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.⚖️ 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 change it (c) we measure it
2. 2.🔍 Which is the odd one out? (a) a vacuum cleaner (b) a suction hook (c) a fridge magnet (d) a drinking straw
3. 3.⚖️ 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 measure it (b) we change it (c) we keep it the same
4. 4.🔮 Predict: you blow up a balloon. What fills it? (a) water (b) sand (c) smoke (d) air
5. 5.⚖️ 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) the same card (c) whether the card stays (d) the same glass
6. 6.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same card is kept the same. (a) True (b) False
7. 7.⚖️ 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 way we turn it (b) the same glass (c) whether the card stays (d) the same card
8. 8.🔍 Which is the odd one out? (a) a magnetic pin holder (b) a bicycle pump (c) a medicine dropper (d) a drinking straw
9. 9.🔮 Why do we try the card trick over a sink or a bucket? (a) to catch any spills (b) to grow plants (c) to make it rain (d) to cool the glass
10. 10.🧺 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 glass of water (c) yeast (d) a towel
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 same glass”? (a) we measure it (b) we keep it the same (c) we change it
12. 12.🧺 Which of these is needed for the card-on-a-glass trick? (a) a towel (b) a mirror (c) a battery cell (d) a magnet
13. 13.True or false: a glass of water is not needed for the card-on-a-glass trick. (a) False (b) True
14. 14.🥛 Which of these works by air pressure? (a) a magnetic pin holder (b) a fridge magnet (c) a magnetic chess set (d) a suction hook
15. 15.🧺 Which of these is needed for the card-on-a-glass trick? (a) a mirror (b) turmeric powder (c) a sink or a bucket (d) a balloon
16. 16.🧺 Which of these is needed for the card-on-a-glass trick? (a) a battery cell (b) a glass of water (c) yeast (d) turmeric powder
17. 17.True or false: a stiff postcard is not needed for the card-on-a-glass trick. (a) True (b) False
18. 18.True or false: a stiff postcard is needed for the card-on-a-glass trick. (a) False (b) True
19. 19.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a towel (b) a sink or a bucket (c) a stiff postcard (d) a magnet
20. 20.🥛 What holds the card up against the upside-down glass? (a) air pushing up (b) glue on the card (c) the cold water (d) a magnet
21. 21.🥛 Does a compass needle work by air pressure or by magnetism? (a) magnetism (b) air pressure
22. 22.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is hotter (b) it is heavier (c) it is magnetic (d) it will not break
23. 23.🧺 Do we need a battery cell for the card-on-a-glass trick? (a) not needed (b) needed
24. 24.🧺 Which of these is needed for the card-on-a-glass trick? (a) yeast (b) a balloon (c) a stiff postcard (d) a magnet
25. 25.True or false: a suction hook works by magnetism. (a) True (b) False
26. 26.📘 Air presses on everything around us. What is this push called? (a) friction (b) sunlight (c) air pressure (d) magnetism
27. 27.🥛 Does a magnetic pin holder work by air pressure or by magnetism? (a) magnetism (b) air pressure
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) water is hiding there (d) the cap is sticky
29. 29.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) not needed (b) needed
30. 30.🧺 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 sink or a bucket
31. 31.🛟 Where should you do the card-and-glass trick? (a) on a bed (b) near a plug point (c) over a laptop (d) over a sink or bucket
32. 32.True or false: a sink or a bucket is not needed for the card-on-a-glass trick. (a) True (b) False
33. 33.True or false: a magnet is needed for the card-on-a-glass trick. (a) True (b) False
34. 34.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same glass is what we measure. (a) False (b) True
35. 35.True or false: a compass needle works by air pressure. (a) False (b) True
36. 36.⚖️ 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
37. 37.True or false: a magnetic chess set works by magnetism. (a) False (b) True
38. 38.True or false: a compass needle works by magnetism. (a) False (b) True
39. 39.⚖️ 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
40. 40.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) a stiff postcard (c) a balloon (d) a towel

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