Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 959 · 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 heavier (b) it is hotter (c) it is magnetic (d) it will not break
2. 2.🧺 Do we need yeast for the card-on-a-glass trick? (a) needed (b) not needed
3. 3.True or false: a suction hook works by magnetism. (a) True (b) False
4. 4.True or false: a sink or a bucket is needed for the card-on-a-glass trick. (a) False (b) True
5. 5.🧺 Do we need a balloon for the card-on-a-glass trick? (a) needed (b) not needed
6. 6.🧺 Do we need a towel for the card-on-a-glass trick? (a) needed (b) not needed
7. 7.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a mirror (c) a glass of water (d) a towel
8. 8.🔍 Which is the odd one out? (a) a compass needle (b) a drinking straw (c) a magnetic pin holder (d) a fridge magnet
9. 9.🔮 Why do we try the card trick over a sink or a bucket? (a) to catch any spills (b) to grow plants (c) to cool the glass (d) to make it rain
10. 10.🥛 What holds the card up against the upside-down glass? (a) a magnet (b) the cold water (c) air pushing up (d) glue on the card
11. 11.🔍 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 water turns to ice (c) the glass breaks (d) the card flies away
12. 12.⚖️ 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 kept the same. (a) False (b) True
13. 13.⚖️ 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 keep it the same (b) we measure it (c) we change it
14. 14.⚖️ 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
15. 15.🥛 Does a compass needle work by air pressure or by magnetism? (a) magnetism (b) air pressure
16. 16.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) turmeric powder (c) a stiff postcard (d) a sink or a bucket
17. 17.⚖️ 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 keep it the same (b) we change it (c) we measure it
18. 18.🔍 Which is the odd one out? (a) a suction hook (b) a bicycle pump (c) a drinking straw (d) a magnetic chess set
19. 19.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a compass needle (c) a magnetic pin holder (d) a suction hook
20. 20.🔍 Which is the odd one out? (a) a vacuum cleaner (b) a fridge magnet (c) a medicine dropper (d) a bicycle pump
21. 21.⚖️ 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 card (b) the way we turn it (c) how full the glass is (d) whether the card stays
22. 22.🥛 Does a fridge magnet work by air pressure or by magnetism? (a) magnetism (b) air pressure
23. 23.🥛 Does a magnetic pin holder work by air pressure or by magnetism? (a) air pressure (b) magnetism
24. 24.True or false: a medicine dropper works by magnetism. (a) False (b) True
25. 25.True or false: a glass of water is needed for the card-on-a-glass trick. (a) False (b) True
26. 26.🧺 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 magnet (d) a stiff postcard
27. 27.🔍 Which is the odd one out? (a) a vacuum cleaner (b) a magnetic pin holder (c) a fridge magnet (d) a magnetic chess set
28. 28.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) yeast (b) a stiff postcard (c) a towel (d) a glass of water
29. 29.True or false: a drinking straw works by air pressure. (a) False (b) True
30. 30.🔮 Predict: you blow up a balloon. What fills it? (a) smoke (b) sand (c) water (d) air
31. 31.🛟 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
32. 32.True or false: a stiff postcard is not needed for the card-on-a-glass trick. (a) False (b) True
33. 33.⚖️ 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) False (b) True
34. 34.🧺 Which of these is needed for the card-on-a-glass trick? (a) a magnet (b) a towel (c) a balloon (d) a mirror
35. 35.🥛 Why is it best to fill the glass right to the top? (a) the card gets wet (b) little air left inside (c) water is heavier (d) it looks nicer
36. 36.🥛 Which of these works by magnetism? (a) a vacuum cleaner (b) a fridge magnet (c) a bicycle pump (d) a medicine dropper
37. 37.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a towel (c) a mirror (d) a stiff postcard
38. 38.⚖️ 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
39. 39.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same card is kept the same. (a) True (b) False
40. 40.⚖️ 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) True (b) False

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