Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 975 · 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.🔮 Predict: you blow up a balloon. What fills it? (a) water (b) air (c) sand (d) smoke
2. 2.True or false: a drinking straw works by magnetism. (a) False (b) True
3. 3.🧺 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 towel (c) a magnet (d) a stiff postcard
4. 4.🥛 Does a fridge magnet work by air pressure or by magnetism? (a) magnetism (b) air pressure
5. 5.🥛 Does a suction hook work by air pressure or by magnetism? (a) magnetism (b) air pressure
6. 6.🔮 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) air inside pushes back (d) water is hiding there
7. 7.🥛 Why is it best to fill the glass right to the top? (a) the card gets wet (b) little air left inside (c) it looks nicer (d) water is heavier
8. 8.🧺 Which of these is needed for the card-on-a-glass trick? (a) a battery cell (b) a mirror (c) a glass of water (d) a magnet
9. 9.🛟 Where should you do the card-and-glass trick? (a) near a plug point (b) over a sink or bucket (c) on a bed (d) over a laptop
10. 10.🥛 Which of these works by magnetism? (a) a drinking straw (b) a bicycle pump (c) a suction hook (d) a compass needle
11. 11.🧺 Do we need a magnet for the card-on-a-glass trick? (a) not needed (b) needed
12. 12.🔍 Which is the odd one out? (a) a medicine dropper (b) a drinking straw (c) a bicycle pump (d) a fridge magnet
13. 13.⚖️ 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) whether the card stays (d) how full the glass is
14. 14.⚖️ 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 change it (c) we keep it the same
15. 15.⚖️ 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
16. 16.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a towel (b) a stiff postcard (c) a glass of water (d) a magnet
17. 17.🥛 Which of these works by air pressure? (a) a magnetic chess set (b) a compass needle (c) a bicycle pump (d) a fridge magnet
18. 18.⚖️ 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 way we turn it (c) the same glass (d) whether the card stays
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 what we measure. (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 change it (b) we measure it (c) we keep it the same
21. 21.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a magnetic chess set (c) a compass needle (d) a suction hook
22. 22.⚖️ 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 measure it (c) we keep it the same
23. 23.🥛 Which of these works by air pressure? (a) a magnetic pin holder (b) a drinking straw (c) a fridge magnet (d) a compass needle
24. 24.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the card flies away (b) the water turns to ice (c) the card stays on (d) the glass breaks
25. 25.🧺 Do we need yeast for the card-on-a-glass trick? (a) not needed (b) needed
26. 26.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) a stiff postcard (c) turmeric powder (d) a glass of water
27. 27.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) yeast (c) a glass of water (d) a towel
28. 28.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is hotter (b) it is magnetic (c) it will not break (d) it is heavier
29. 29.🧺 Which of these is needed for the card-on-a-glass trick? (a) yeast (b) a sink or a bucket (c) a balloon (d) a mirror
30. 30.🥛 Does a compass needle work by air pressure or by magnetism? (a) magnetism (b) air pressure
31. 31.🥛 Does a medicine dropper work by air pressure or by magnetism? (a) magnetism (b) air pressure
32. 32.🔍 Which is the odd one out? (a) a magnetic pin holder (b) a suction hook (c) a magnetic chess set (d) a fridge magnet
33. 33.🥛 Does a drinking straw work by air pressure or by magnetism? (a) magnetism (b) air pressure
34. 34.True or false: a fridge magnet works by magnetism. (a) True (b) False
35. 35.🧺 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 towel (c) a stiff postcard (d) a mirror
36. 36.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a towel (b) a glass of water (c) a sink or a bucket (d) turmeric powder
37. 37.🔍 Which is the odd one out? (a) a medicine dropper (b) a magnetic pin holder (c) a drinking straw (d) a vacuum cleaner
38. 38.🥤 Why does juice go up a drinking straw when you sip? (a) the straw is magnetic (b) juice likes plastic (c) the straw is hot (d) air pushes it up
39. 39.🧺 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 balloon (d) a stiff postcard
40. 40.True or false: a sink or a bucket is needed for the card-on-a-glass trick. (a) False (b) True

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