Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 625 · 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.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a sink or a bucket (c) yeast (d) a stiff postcard
2. 2.🥛 Which of these works by magnetism? (a) a vacuum cleaner (b) a suction hook (c) a magnetic pin holder (d) a medicine dropper
3. 3.⚖️ 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
4. 4.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a towel (c) a glass of water (d) a battery cell
5. 5.True or false: a drinking straw works by magnetism. (a) True (b) False
6. 6.🥛 Which of these works by air pressure? (a) a magnetic pin holder (b) a fridge magnet (c) a suction hook (d) a compass needle
7. 7.True or false: a sink or a bucket is not needed for the card-on-a-glass trick. (a) True (b) False
8. 8.True or false: a balloon is needed for the card-on-a-glass trick. (a) False (b) True
9. 9.🥛 Does a compass needle work by air pressure or by magnetism? (a) air pressure (b) magnetism
10. 10.⚖️ 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 glass (b) the way we turn it (c) the same card (d) whether the card stays
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.⚖️ 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) the same glass (c) how full the glass is (d) the same card
13. 13.True or false: a bicycle pump works by air pressure. (a) True (b) False
14. 14.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the water turns to ice (b) the glass breaks (c) the card flies away (d) the card stays on
15. 15.🧺 Do we need a balloon for the card-on-a-glass trick? (a) not needed (b) needed
16. 16.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) a mirror (c) a stiff postcard (d) a sink or a bucket
17. 17.🥛 Which of these works by magnetism? (a) a vacuum cleaner (b) a suction hook (c) a magnetic chess set (d) a bicycle pump
18. 18.🧺 Which of these is needed for the card-on-a-glass trick? (a) a stiff postcard (b) a mirror (c) a magnet (d) a battery cell
19. 19.⚖️ 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) True (b) False
20. 20.True or false: a battery cell is needed for the card-on-a-glass trick. (a) False (b) True
21. 21.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is heavier (b) it is hotter (c) it will not break (d) it is magnetic
22. 22.🥛 What holds the card up against the upside-down glass? (a) a magnet (b) air pushing up (c) glue on the card (d) the cold water
23. 23.🛟 Where should you do the card-and-glass trick? (a) over a sink or bucket (b) near a plug point (c) on a bed (d) over a laptop
24. 24.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the bottle is magnetic (b) water is hiding there (c) air inside pushes back (d) the cap is sticky
25. 25.🔮 Predict: you blow up a balloon. What fills it? (a) water (b) sand (c) smoke (d) air
26. 26.🧺 Do we need a towel for the card-on-a-glass trick? (a) needed (b) not needed
27. 27.🥛 Does a vacuum cleaner work by air pressure or by magnetism? (a) air pressure (b) magnetism
28. 28.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a magnet (c) a towel (d) a stiff postcard
29. 29.True or false: turmeric powder is not needed for the card-on-a-glass trick. (a) True (b) False
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 the one thing we change. (a) False (b) True
31. 31.🧺 Which of these is needed for the card-on-a-glass trick? (a) a magnet (b) a towel (c) a battery cell (d) turmeric powder
32. 32.📘 Air presses on everything around us. What is this push called? (a) friction (b) sunlight (c) air pressure (d) magnetism
33. 33.🧺 Which of these is needed for the card-on-a-glass trick? (a) a sink or a bucket (b) turmeric powder (c) a mirror (d) yeast
34. 34.🔍 Which is the odd one out? (a) a magnetic chess set (b) a drinking straw (c) a vacuum cleaner (d) a suction hook
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 sink or a bucket (d) turmeric powder
36. 36.🔍 Which is the odd one out? (a) a suction hook (b) a bicycle pump (c) a compass needle (d) a medicine dropper
37. 37.🧺 Do we need yeast for the card-on-a-glass trick? (a) needed (b) not needed
38. 38.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a balloon (b) a glass of water (c) a stiff postcard (d) a towel
39. 39.⚖️ 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
40. 40.🧺 Which of these is needed for the card-on-a-glass trick? (a) a mirror (b) a glass of water (c) yeast (d) turmeric powder

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