Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 674 · 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 sink or a bucket (b) a towel (c) a magnet (d) a stiff postcard
2. 2.🔍 Which is the odd one out? (a) a magnetic chess set (b) a magnetic pin holder (c) a medicine dropper (d) a compass needle
3. 3.🥛 Which of these works by magnetism? (a) a vacuum cleaner (b) a suction hook (c) a bicycle pump (d) a fridge magnet
4. 4.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is magnetic (b) it is heavier (c) it is hotter (d) it will not break
5. 5.True or false: a balloon is needed for the card-on-a-glass trick. (a) True (b) False
6. 6.🥛 Which of these works by magnetism? (a) a vacuum cleaner (b) a compass needle (c) a suction hook (d) a drinking straw
7. 7.🔍 Which is the odd one out? (a) a magnetic chess set (b) a bicycle pump (c) a magnetic pin holder (d) a compass needle
8. 8.🔍 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 glass breaks (c) the water turns to ice (d) the card flies away
9. 9.🥛 Does a magnetic chess set work by air pressure or by magnetism? (a) magnetism (b) air pressure
10. 10.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a magnet (b) a stiff postcard (c) a glass of water (d) a sink or a bucket
11. 11.⚖️ 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 measure it (c) we keep it the same
12. 12.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) yeast (c) a sink or a bucket (d) a towel
13. 13.🛟 Where should you do the card-and-glass trick? (a) over a laptop (b) near a plug point (c) over a sink or bucket (d) on a bed
14. 14.🥛 Does a magnetic pin holder work by air pressure or by magnetism? (a) magnetism (b) air pressure
15. 15.🥛 Which of these works by air pressure? (a) a drinking straw (b) a fridge magnet (c) a magnetic pin holder (d) a magnetic chess set
16. 16.🥛 Does a bicycle pump work by air pressure or by magnetism? (a) magnetism (b) air pressure
17. 17.🥛 Does a compass needle work by air pressure or by magnetism? (a) air pressure (b) magnetism
18. 18.🥛 What holds the card up against the upside-down glass? (a) air pushing up (b) glue on the card (c) the cold water (d) a magnet
19. 19.⚖️ 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 kept the same. (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 what we measure? (a) how full the glass is (b) the same glass (c) the way we turn it (d) whether the card stays
21. 21.🧺 Which of these is needed for the card-on-a-glass trick? (a) a magnet (b) a mirror (c) turmeric powder (d) a towel
22. 22.⚖️ 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) True (b) False
23. 23.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the cap is sticky (b) water is hiding there (c) the bottle is magnetic (d) air inside pushes back
24. 24.🔮 Predict: you blow up a balloon. What fills it? (a) sand (b) air (c) smoke (d) water
25. 25.📘 Air presses on everything around us. What is this push called? (a) air pressure (b) sunlight (c) friction (d) magnetism
26. 26.⚖️ 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
27. 27.🧺 Do we need a towel for the card-on-a-glass trick? (a) needed (b) not needed
28. 28.True or false: a battery cell is needed for the card-on-a-glass trick. (a) True (b) False
29. 29.🔍 Which is the odd one out? (a) a vacuum cleaner (b) a bicycle pump (c) a medicine dropper (d) a magnetic chess set
30. 30.⚖️ 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 change it (c) we keep it the same
31. 31.True or false: a fridge magnet works by magnetism. (a) False (b) True
32. 32.True or false: a magnetic pin holder works by magnetism. (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 glass is the one thing we change. (a) False (b) True
34. 34.🥛 Which of these works by air pressure? (a) a vacuum cleaner (b) a fridge magnet (c) a magnetic pin holder (d) a magnetic chess set
35. 35.🥛 Why is it best to fill the glass right to the top? (a) the card gets wet (b) it looks nicer (c) water is heavier (d) little air left inside
36. 36.⚖️ 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 glass
37. 37.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) needed (b) not needed
38. 38.⚖️ 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) the same card (b) whether the card stays (c) how full the glass is (d) the way we turn it
39. 39.True or false: a vacuum cleaner works by air pressure. (a) True (b) False
40. 40.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) a stiff postcard (c) a battery cell (d) a sink or a bucket

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