Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 129 · 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 is the odd one out? (a) a compass needle (b) a magnetic chess set (c) a drinking straw (d) a magnetic pin holder
2. 2.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) a balloon (c) a stiff postcard (d) a glass of water
3. 3.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a compass needle (c) a magnetic pin holder (d) a bicycle pump
4. 4.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) not needed (b) needed
5. 5.🔍 Which is the odd one out? (a) a bicycle pump (b) a fridge magnet (c) a medicine dropper (d) a vacuum cleaner
6. 6.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the glass breaks (b) the water turns to ice (c) the card stays on (d) the card flies away
7. 7.🧺 Which of these is needed for the card-on-a-glass trick? (a) a balloon (b) a magnet (c) a stiff postcard (d) a mirror
8. 8.🛟 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 heavier (d) it is hotter
9. 9.⚖️ 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
10. 10.🔮 Predict: you blow up a balloon. What fills it? (a) water (b) smoke (c) sand (d) air
11. 11.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a towel (b) a glass of water (c) a mirror (d) a stiff postcard
12. 12.True or false: a battery cell is needed for the card-on-a-glass trick. (a) False (b) True
13. 13.🥛 Which of these works by magnetism? (a) a medicine dropper (b) a drinking straw (c) a magnetic chess set (d) a suction hook
14. 14.🔍 Which is the odd one out? (a) a compass needle (b) a fridge magnet (c) a magnetic chess set (d) a vacuum cleaner
15. 15.⚖️ 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 measure it (c) we change it
16. 16.⚖️ 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) how full the glass is (b) the same card (c) the same glass (d) whether the card stays
17. 17.True or false: turmeric powder is not needed for the card-on-a-glass trick. (a) False (b) True
18. 18.⚖️ 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) True (b) False
19. 19.True or false: a fridge magnet works by air pressure. (a) False (b) True
20. 20.⚖️ 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 way we turn it (c) how full the glass is
21. 21.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) not needed (b) needed
22. 22.🧺 Do we need a battery cell for the card-on-a-glass trick? (a) not needed (b) needed
23. 23.🥛 Why is it best to fill the glass right to the top? (a) the card gets wet (b) water is heavier (c) little air left inside (d) it looks nicer
24. 24.🔍 Which is the odd one out? (a) a fridge magnet (b) a magnetic chess set (c) a magnetic pin holder (d) a medicine dropper
25. 25.⚖️ 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
26. 26.🔍 Which is the odd one out? (a) a compass needle (b) a bicycle pump (c) a medicine dropper (d) a vacuum cleaner
27. 27.🧺 Do we need a balloon for the card-on-a-glass trick? (a) needed (b) not needed
28. 28.🥛 Which of these works by magnetism? (a) a vacuum cleaner (b) a magnetic pin holder (c) a drinking straw (d) a bicycle pump
29. 29.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a mirror (b) a stiff postcard (c) a glass of water (d) a sink or a bucket
30. 30.📘 Air presses on everything around us. What is this push called? (a) friction (b) magnetism (c) air pressure (d) sunlight
31. 31.🧺 Which of these is needed for the card-on-a-glass trick? (a) a balloon (b) a battery cell (c) a towel (d) turmeric powder
32. 32.⚖️ 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) 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) True (b) False
34. 34.⚖️ 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
35. 35.True or false: a vacuum cleaner works by magnetism. (a) True (b) False
36. 36.True or false: a compass needle works by air pressure. (a) False (b) True
37. 37.True or false: a glass of water is not needed for the card-on-a-glass trick. (a) False (b) True
38. 38.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) a battery cell (c) a towel (d) a sink or a bucket
39. 39.True or false: a battery cell is not needed for the card-on-a-glass trick. (a) True (b) False
40. 40.🛟 Where should you do the card-and-glass trick? (a) on a bed (b) near a plug point (c) over a laptop (d) over a sink or bucket

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