Air Pressure Experiment Worksheet

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

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