Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 784 · 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.True or false: a sink or a bucket is not needed for the card-on-a-glass trick. (a) False (b) True
2. 2.🔍 Which is the odd one out? (a) a magnetic pin holder (b) a compass needle (c) a drinking straw (d) a magnetic chess set
3. 3.🛟 Where should you do the card-and-glass trick? (a) over a laptop (b) on a bed (c) near a plug point (d) over a sink or bucket
4. 4.🥛 Does a magnetic chess set work by air pressure or by magnetism? (a) magnetism (b) air pressure
5. 5.🥛 Does a drinking straw work by air pressure or by magnetism? (a) magnetism (b) air pressure
6. 6.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “the way we turn it”? (a) we measure it (b) we change it (c) we keep it the same
7. 7.⚖️ 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
8. 8.⚖️ 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) the same glass (c) how full the glass is (d) the same card
9. 9.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is heavier (b) it is magnetic (c) it is hotter (d) it will not break
10. 10.🧺 Do we need yeast for the card-on-a-glass trick? (a) not needed (b) needed
11. 11.🧺 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) a stiff postcard (d) a magnet
12. 12.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the card stays on (b) the card flies away (c) the water turns to ice (d) the glass breaks
13. 13.True or false: a stiff postcard is not needed for the card-on-a-glass trick. (a) False (b) True
14. 14.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) a battery cell (c) a glass of water (d) a stiff postcard
15. 15.🥛 Which of these works by air pressure? (a) a magnetic pin holder (b) a compass needle (c) a fridge magnet (d) a vacuum cleaner
16. 16.True or false: a magnet is not needed for the card-on-a-glass trick. (a) False (b) True
17. 17.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) needed (b) not needed
18. 18.🥛 Why is it best to fill the glass right to the top? (a) water is heavier (b) the card gets wet (c) it looks nicer (d) little air left inside
19. 19.🔍 Which is the odd one out? (a) a vacuum cleaner (b) a compass needle (c) a medicine dropper (d) a suction hook
20. 20.True or false: a suction hook works by magnetism. (a) True (b) False
21. 21.🥤 Why does juice go up a drinking straw when you sip? (a) juice likes plastic (b) air pushes it up (c) the straw is magnetic (d) the straw is hot
22. 22.🔮 Predict: you blow up a balloon. What fills it? (a) water (b) sand (c) smoke (d) air
23. 23.🔍 Which is the odd one out? (a) a compass needle (b) a magnetic pin holder (c) a fridge magnet (d) a suction hook
24. 24.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a mirror (b) a sink or a bucket (c) a stiff postcard (d) a towel
25. 25.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a stiff postcard (c) a mirror (d) a glass of water
26. 26.🧺 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 balloon (c) a stiff postcard (d) a towel
27. 27.🥛 Which of these works by magnetism? (a) a drinking straw (b) a medicine dropper (c) a magnetic pin holder (d) a suction hook
28. 28.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) not needed (b) needed
29. 29.🔍 Which is the odd one out? (a) a drinking straw (b) a medicine dropper (c) a suction hook (d) a magnetic pin holder
30. 30.🧺 Which of these is needed for the card-on-a-glass trick? (a) a mirror (b) a balloon (c) yeast (d) a stiff postcard
31. 31.🧺 Which of these is needed for the card-on-a-glass trick? (a) turmeric powder (b) a battery cell (c) a sink or a bucket (d) a balloon
32. 32.⚖️ 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 change it (b) we keep it the same (c) we measure it
33. 33.🔍 Which is the odd one out? (a) a compass needle (b) a magnetic chess set (c) a bicycle pump (d) a magnetic pin holder
34. 34.⚖️ 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) True (b) False
35. 35.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the bottle is magnetic (b) the cap is sticky (c) water is hiding there (d) air inside pushes back
36. 36.True or false: a compass needle works by magnetism. (a) False (b) True
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 card”? (a) we keep it the same (b) we measure it (c) we change it
38. 38.⚖️ 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
39. 39.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a magnetic pin holder (c) a magnetic chess set (d) a medicine dropper
40. 40.🥛 What holds the card up against the upside-down glass? (a) a magnet (b) air pushing up (c) the cold water (d) glue on the card

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