Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 378 · 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) air (b) smoke (c) water (d) sand
2. 2.🧺 Which of these is needed for the card-on-a-glass trick? (a) a balloon (b) a mirror (c) a sink or a bucket (d) yeast
3. 3.True or false: a sink or a bucket is needed for the card-on-a-glass trick. (a) False (b) True
4. 4.🥛 Which of these works by magnetism? (a) a vacuum cleaner (b) a suction hook (c) a compass needle (d) a drinking straw
5. 5.🔍 Which is the odd one out? (a) a drinking straw (b) a fridge magnet (c) a magnetic chess set (d) a compass needle
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 change it (b) we measure it (c) we keep it the same
7. 7.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a magnetic chess set (c) a vacuum cleaner (d) a compass needle
8. 8.⚖️ 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) how full the glass is (c) the same glass (d) the way we turn it
9. 9.⚖️ 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
10. 10.🥛 Which of these works by magnetism? (a) a fridge magnet (b) a drinking straw (c) a bicycle pump (d) a vacuum cleaner
11. 11.True or false: a glass of water is needed for the card-on-a-glass trick. (a) False (b) True
12. 12.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is hotter (b) it is heavier (c) it will not break (d) it is magnetic
13. 13.🥛 Which of these works by magnetism? (a) a magnetic chess set (b) a medicine dropper (c) a bicycle pump (d) a vacuum cleaner
14. 14.🥛 What holds the card up against the upside-down glass? (a) air pushing up (b) the cold water (c) glue on the card (d) a magnet
15. 15.True or false: a towel is not needed for the card-on-a-glass trick. (a) False (b) True
16. 16.🔮 Why do we try the card trick over a sink or a bucket? (a) to cool the glass (b) to make it rain (c) to catch any spills (d) to grow plants
17. 17.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) needed (b) not needed
18. 18.📘 Air presses on everything around us. What is this push called? (a) friction (b) magnetism (c) air pressure (d) sunlight
19. 19.True or false: a drinking straw works by air pressure. (a) True (b) False
20. 20.⚖️ 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
21. 21.⚖️ 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
22. 22.⚖️ 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 measure it (b) we keep it the same (c) we change it
23. 23.⚖️ 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) whether the card stays (b) how full the glass is (c) the same card
24. 24.⚖️ 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
25. 25.🧺 Do we need a mirror for the card-on-a-glass trick? (a) needed (b) not needed
26. 26.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a stiff postcard (b) a magnet (c) a glass of water (d) a towel
27. 27.True or false: a compass needle works by magnetism. (a) True (b) False
28. 28.🧺 Which of these is needed for the card-on-a-glass trick? (a) a magnet (b) a battery cell (c) a towel (d) a balloon
29. 29.🔍 Which is the odd one out? (a) a suction hook (b) a compass needle (c) a drinking straw (d) a medicine dropper
30. 30.True or false: a drinking straw works by magnetism. (a) True (b) False
31. 31.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same card is what we measure. (a) False (b) True
32. 32.True or false: a glass of water is not needed for the card-on-a-glass trick. (a) False (b) True
33. 33.🥛 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
34. 34.🛟 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
35. 35.🥛 Does a fridge magnet work by air pressure or by magnetism? (a) air pressure (b) magnetism
36. 36.🔍 Which is the odd one out? (a) a drinking straw (b) a suction hook (c) a magnetic pin holder (d) a medicine dropper
37. 37.True or false: a magnetic pin holder works by air pressure. (a) True (b) False
38. 38.True or false: yeast is needed for the card-on-a-glass trick. (a) True (b) False
39. 39.⚖️ 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) whether the card stays (b) the same glass (c) how full the glass is
40. 40.True or false: a compass needle works by air pressure. (a) False (b) True

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