Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 456 · 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.🛟 Where should you do the card-and-glass trick? (a) over a sink or bucket (b) over a laptop (c) on a bed (d) near a plug point
2. 2.True or false: yeast is not needed for the card-on-a-glass trick. (a) True (b) False
3. 3.True or false: a stiff postcard is needed for the card-on-a-glass trick. (a) False (b) True
4. 4.🧺 Which of these is needed for the card-on-a-glass trick? (a) turmeric powder (b) a battery cell (c) a balloon (d) a sink or a bucket
5. 5.🔍 Which is the odd one out? (a) a magnetic chess set (b) a drinking straw (c) a fridge magnet (d) a magnetic pin holder
6. 6.🔮 Why do we try the card trick over a sink or a bucket? (a) to cool the glass (b) to catch any spills (c) to make it rain (d) to grow plants
7. 7.⚖️ 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
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 glass of water is needed for the card-on-a-glass trick. (a) False (b) True
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 change it (b) we measure it (c) we keep it the same
12. 12.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a magnetic pin holder (c) a vacuum cleaner (d) a compass needle
13. 13.🔍 Which is the odd one out? (a) a compass needle (b) a magnetic chess set (c) a bicycle pump (d) a fridge magnet
14. 14.🥛 Why is it best to fill the glass right to the top? (a) it looks nicer (b) little air left inside (c) water is heavier (d) the card gets wet
15. 15.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a magnet (b) a stiff postcard (c) a towel (d) a sink or a bucket
16. 16.🧺 Do we need turmeric powder for the card-on-a-glass trick? (a) not needed (b) needed
17. 17.🥛 What holds the card up against the upside-down glass? (a) the cold water (b) a magnet (c) glue on the card (d) air pushing up
18. 18.🔍 Which is the odd one out? (a) a suction hook (b) a fridge magnet (c) a vacuum cleaner (d) a medicine dropper
19. 19.🥛 Does a bicycle pump work by air pressure or by magnetism? (a) air pressure (b) magnetism
20. 20.🔍 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
21. 21.⚖️ 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 glass
22. 22.🧺 Which of these is needed for the card-on-a-glass trick? (a) a stiff postcard (b) yeast (c) a magnet (d) turmeric powder
23. 23.True or false: a magnetic chess set works by air pressure. (a) False (b) True
24. 24.📘 Air presses on everything around us. What is this push called? (a) friction (b) air pressure (c) magnetism (d) sunlight
25. 25.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) not needed (b) needed
26. 26.True or false: a medicine dropper works by magnetism. (a) False (b) True
27. 27.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a glass of water (c) a magnet (d) a towel
28. 28.⚖️ 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 what we measure. (a) True (b) False
29. 29.🥛 Which of these works by magnetism? (a) a bicycle pump (b) a medicine dropper (c) a drinking straw (d) a compass needle
30. 30.⚖️ 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 keep it the same (b) we measure it (c) we change it
31. 31.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a towel (b) yeast (c) a sink or a bucket (d) a stiff postcard
32. 32.🔮 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 cap is sticky (d) the bottle is magnetic
33. 33.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is magnetic (b) it is hotter (c) it is heavier (d) it will not break
34. 34.⚖️ 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
35. 35.🧺 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) a towel (d) a balloon
36. 36.⚖️ 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 way we turn it (b) how full the glass is (c) the same glass (d) the same card
37. 37.🧺 Do we need a magnet 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.True or false: yeast is needed for the card-on-a-glass trick. (a) True (b) False
40. 40.🔍 Which is the odd one out? (a) a magnetic chess set (b) a compass needle (c) a fridge magnet (d) a vacuum cleaner

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