Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 812 · 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.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is hotter (b) it is heavier (c) it will not break (d) it is magnetic
2. 2.⚖️ 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
3. 3.🛟 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
4. 4.⚖️ 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) whether the card stays (c) the same glass (d) how full the glass is
5. 5.True or false: turmeric powder is not needed for the card-on-a-glass trick. (a) True (b) False
6. 6.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) yeast (c) a towel (d) a stiff postcard
7. 7.True or false: a drinking straw works by air pressure. (a) True (b) False
8. 8.🔮 Predict: you blow up a balloon. What fills it? (a) sand (b) smoke (c) water (d) air
9. 9.🥛 Does a fridge magnet work by air pressure or by magnetism? (a) magnetism (b) air pressure
10. 10.🔍 Which is the odd one out? (a) a bicycle pump (b) a vacuum cleaner (c) a medicine dropper (d) a fridge magnet
11. 11.🧺 Do we need yeast for the card-on-a-glass trick? (a) needed (b) not needed
12. 12.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) a towel (c) a sink or a bucket (d) a magnet
13. 13.🥛 Which of these works by magnetism? (a) a bicycle pump (b) a fridge magnet (c) a vacuum cleaner (d) a suction hook
14. 14.🥛 Does a suction hook work by air pressure or by magnetism? (a) magnetism (b) air pressure
15. 15.True or false: a battery cell is not needed for the card-on-a-glass trick. (a) False (b) True
16. 16.True or false: a bicycle pump works by air pressure. (a) False (b) True
17. 17.⚖️ 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) whether the card stays (c) the same glass (d) the same card
18. 18.📘 Air presses on everything around us. What is this push called? (a) sunlight (b) friction (c) air pressure (d) magnetism
19. 19.True or false: a sink or a bucket is needed for the card-on-a-glass trick. (a) False (b) True
20. 20.⚖️ 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 measure it (b) we change it (c) we keep it the same
21. 21.🥛 Which of these works by magnetism? (a) a vacuum cleaner (b) a drinking straw (c) a magnetic pin holder (d) a suction hook
22. 22.🔍 Which is the odd one out? (a) a suction hook (b) a compass needle (c) a drinking straw (d) a bicycle pump
23. 23.🥤 Why does juice go up a drinking straw when you sip? (a) the straw is hot (b) the straw is magnetic (c) air pushes it up (d) juice likes plastic
24. 24.🔍 Which is the odd one out? (a) a magnetic pin holder (b) a fridge magnet (c) a compass needle (d) a suction hook
25. 25.🔍 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 card stays on (c) the glass breaks (d) the card flies away
26. 26.🔍 Which is the odd one out? (a) a drinking straw (b) a magnetic pin holder (c) a magnetic chess set (d) a compass needle
27. 27.🧺 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 mirror (c) a stiff postcard (d) a towel
28. 28.True or false: a magnet is needed for the card-on-a-glass trick. (a) False (b) True
29. 29.⚖️ 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
30. 30.🥛 Does a medicine dropper work by air pressure or by magnetism? (a) magnetism (b) air pressure
31. 31.⚖️ 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 keep it the same (c) we change it
32. 32.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) not needed (b) needed
33. 33.🧺 Do we need turmeric powder for the card-on-a-glass trick? (a) needed (b) not needed
34. 34.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the cap is sticky (b) the bottle is magnetic (c) air inside pushes back (d) water is hiding there
35. 35.🧺 Which of these is needed for the card-on-a-glass trick? (a) a magnet (b) turmeric powder (c) a sink or a bucket (d) a mirror
36. 36.🧺 Do we need a battery cell for the card-on-a-glass trick? (a) needed (b) not needed
37. 37.⚖️ 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 change it (b) we measure it (c) we keep it the same
38. 38.True or false: a towel is not needed for the card-on-a-glass trick. (a) False (b) True
39. 39.🥛 What holds the card up against the upside-down glass? (a) air pushing up (b) the cold water (c) glue on the card (d) a magnet
40. 40.🧺 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 stiff postcard (c) a glass of water (d) a magnet

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