Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 160 · 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.🧺 Which of these is needed for the card-on-a-glass trick? (a) a battery cell (b) a balloon (c) turmeric powder (d) a towel
2. 2.⚖️ 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
3. 3.🥛 Does a compass needle work by air pressure or by magnetism? (a) air pressure (b) magnetism
4. 4.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) a glass of water (c) a stiff postcard (d) a balloon
5. 5.🛟 Where should you do the card-and-glass trick? (a) on a bed (b) over a sink or bucket (c) near a plug point (d) over a laptop
6. 6.🥛 Which of these works by magnetism? (a) a bicycle pump (b) a drinking straw (c) a medicine dropper (d) a compass needle
7. 7.True or false: a stiff postcard is not needed for the card-on-a-glass trick. (a) False (b) True
8. 8.🥛 Which of these works by air pressure? (a) a compass needle (b) a fridge magnet (c) a drinking straw (d) a magnetic chess set
9. 9.📘 Air presses on everything around us. What is this push called? (a) air pressure (b) sunlight (c) magnetism (d) friction
10. 10.🧺 Do we need a towel for the card-on-a-glass trick? (a) not needed (b) needed
11. 11.True or false: a balloon is not needed for the card-on-a-glass trick. (a) False (b) True
12. 12.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) needed (b) not needed
13. 13.⚖️ 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
14. 14.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) a glass of water (c) a magnet (d) a sink or a bucket
15. 15.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is magnetic (b) it will not break (c) it is hotter (d) it is heavier
16. 16.🔍 Which is the odd one out? (a) a bicycle pump (b) a suction hook (c) a medicine dropper (d) a fridge magnet
17. 17.True or false: a compass needle works by magnetism. (a) True (b) False
18. 18.True or false: a fridge magnet works by air pressure. (a) True (b) False
19. 19.🥛 Does a vacuum cleaner work by air pressure or by magnetism? (a) magnetism (b) air pressure
20. 20.🧺 Which of these is needed for the card-on-a-glass trick? (a) a glass of water (b) a mirror (c) turmeric powder (d) a battery cell
21. 21.🥛 What holds the card up against the upside-down glass? (a) air pushing up (b) a magnet (c) the cold water (d) glue on the card
22. 22.⚖️ 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
23. 23.🔮 Predict: you blow up a balloon. What fills it? (a) smoke (b) sand (c) water (d) air
24. 24.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) needed (b) not needed
25. 25.⚖️ 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 the one thing we change. (a) False (b) True
26. 26.🥛 Does a bicycle pump work by air pressure or by magnetism? (a) air pressure (b) magnetism
27. 27.🥛 Which of these works by magnetism? (a) a vacuum cleaner (b) a suction hook (c) a magnetic chess set (d) a drinking straw
28. 28.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same glass is kept the same. (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: whether the card stays is what we measure. (a) False (b) True
30. 30.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a stiff postcard (b) a mirror (c) a glass of water (d) a towel
31. 31.🥛 Why is it best to fill the glass right to the top? (a) the card gets wet (b) water is heavier (c) it looks nicer (d) little air left inside
32. 32.🧺 Which of these is needed for the card-on-a-glass trick? (a) turmeric powder (b) a mirror (c) a stiff postcard (d) a battery cell
33. 33.True or false: a sink or a bucket is not needed for the card-on-a-glass trick. (a) False (b) True
34. 34.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a towel (b) a sink or a bucket (c) yeast (d) a stiff postcard
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 same card”? (a) we keep it the same (b) we change it (c) we measure it
36. 36.🔍 Which is the odd one out? (a) a vacuum cleaner (b) a drinking straw (c) a magnetic pin holder (d) a suction hook
37. 37.⚖️ 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) the way we turn it (b) whether the card stays (c) how full the glass is
38. 38.🔮 Why do we try the card trick over a sink or a bucket? (a) to catch any spills (b) to grow plants (c) to make it rain (d) to cool the glass
39. 39.True or false: a magnet is needed for the card-on-a-glass trick. (a) True (b) False
40. 40.🧺 Do we need turmeric powder for the card-on-a-glass trick? (a) needed (b) not needed

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