Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 157 · 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) sand (d) water
2. 2.⚖️ 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) how full the glass is (b) the way we turn it (c) whether the card stays (d) the same card
3. 3.🥛 Does a magnetic pin holder work by air pressure or by magnetism? (a) magnetism (b) air pressure
4. 4.⚖️ 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
5. 5.🛟 Where should you do the card-and-glass trick? (a) over a laptop (b) near a plug point (c) on a bed (d) over a sink or bucket
6. 6.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a towel (b) a sink or a bucket (c) a glass of water (d) a mirror
7. 7.🔍 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 card flies away (d) the water turns to ice
8. 8.⚖️ 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 glass (b) whether the card stays (c) the same card (d) the way we turn it
9. 9.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) not needed (b) needed
10. 10.⚖️ 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
11. 11.True or false: a compass needle works by magnetism. (a) True (b) False
12. 12.⚖️ 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
13. 13.True or false: a mirror is needed for the card-on-a-glass trick. (a) True (b) False
14. 14.📘 Air presses on everything around us. What is this push called? (a) friction (b) air pressure (c) magnetism (d) sunlight
15. 15.⚖️ 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 measure it (b) we keep it the same (c) we change it
16. 16.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) not needed (b) needed
17. 17.🥛 Which of these works by air pressure? (a) a compass needle (b) a fridge magnet (c) a magnetic pin holder (d) a medicine dropper
18. 18.🔍 Which is the odd one out? (a) a compass needle (b) a suction hook (c) a drinking straw (d) a vacuum cleaner
19. 19.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is hotter (b) it will not break (c) it is heavier (d) it is magnetic
20. 20.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) yeast (b) a glass of water (c) a sink or a bucket (d) a stiff postcard
21. 21.🔍 Which is the odd one out? (a) a magnetic pin holder (b) a magnetic chess set (c) a medicine dropper (d) a fridge magnet
22. 22.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the cap is sticky (b) the bottle is magnetic (c) water is hiding there (d) air inside pushes back
23. 23.True or false: a mirror is not needed for the card-on-a-glass trick. (a) True (b) False
24. 24.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) turmeric powder (c) a stiff postcard (d) a sink or a bucket
25. 25.True or false: a suction hook works by magnetism. (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 towel (c) a balloon (d) a sink or a bucket
27. 27.🥛 Which of these works by air pressure? (a) a magnetic chess set (b) a compass needle (c) a fridge magnet (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 way we turn it is the one thing we change. (a) True (b) False
29. 29.True or false: a magnet is needed for the card-on-a-glass trick. (a) False (b) True
30. 30.🔍 Which is the odd one out? (a) a drinking straw (b) a vacuum cleaner (c) a fridge magnet (d) a bicycle pump
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 kept the same. (a) True (b) False
32. 32.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) a sink or a bucket (c) a stiff postcard (d) a battery cell
33. 33.🧺 Which of these is needed for the card-on-a-glass trick? (a) a battery cell (b) a glass of water (c) a mirror (d) a balloon
34. 34.🥛 Which of these works by magnetism? (a) a drinking straw (b) a vacuum cleaner (c) a fridge magnet (d) a bicycle pump
35. 35.⚖️ 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) how full the glass is (b) whether the card stays (c) the same glass
36. 36.True or false: a sink or a bucket is needed for the card-on-a-glass trick. (a) False (b) True
37. 37.🥛 Does a magnetic chess set work by air pressure or by magnetism? (a) magnetism (b) air pressure
38. 38.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a balloon (b) a glass of water (c) a stiff postcard (d) a towel
39. 39.🔍 Which is the odd one out? (a) a magnetic chess set (b) a vacuum cleaner (c) a fridge magnet (d) a magnetic pin holder
40. 40.🥛 Which of these works by air pressure? (a) a magnetic pin holder (b) a fridge magnet (c) a vacuum cleaner (d) a compass needle

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