Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 891 · 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) water (b) smoke (c) sand (d) air
2. 2.🥛 What holds the card up against the upside-down glass? (a) glue on the card (b) air pushing up (c) the cold water (d) a magnet
3. 3.🥤 Why does juice go up a drinking straw when you sip? (a) the straw is magnetic (b) air pushes it up (c) the straw is hot (d) juice likes plastic
4. 4.🥛 Which of these works by magnetism? (a) a vacuum cleaner (b) a suction hook (c) a drinking straw (d) a magnetic chess set
5. 5.🧺 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 stiff postcard (d) a balloon
6. 6.🧺 Which of these is needed for the card-on-a-glass trick? (a) a magnet (b) turmeric powder (c) a sink or a bucket (d) a mirror
7. 7.⚖️ 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) whether the card stays (b) how full the glass is (c) the same glass (d) the same card
8. 8.⚖️ 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 measure it (c) we change it
9. 9.🥛 Does a drinking straw work by air pressure or by magnetism? (a) air pressure (b) magnetism
10. 10.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) needed (b) not needed
11. 11.True or false: a drinking straw 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? True or false: whether the card stays is what we measure. (a) True (b) False
13. 13.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a stiff postcard (c) a mirror (d) a towel
14. 14.🧺 Which of these is not needed for the card-on-a-glass trick? (a) yeast (b) a glass of water (c) a towel (d) a sink or a bucket
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.True or false: a battery cell is not needed for the card-on-a-glass trick. (a) True (b) False
17. 17.🥛 Which of these works by air pressure? (a) a compass needle (b) a fridge magnet (c) a bicycle pump (d) a magnetic pin holder
18. 18.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) needed (b) not needed
19. 19.🥛 Which of these works by magnetism? (a) a bicycle pump (b) a drinking straw (c) a compass needle (d) a medicine dropper
20. 20.🧺 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 stiff postcard (c) turmeric powder (d) a towel
21. 21.🔍 Which is the odd one out? (a) a drinking straw (b) a suction hook (c) a magnetic chess set (d) a bicycle pump
22. 22.🔍 Which is the odd one out? (a) a suction hook (b) a fridge magnet (c) a magnetic chess set (d) a compass needle
23. 23.🔍 Which is the odd one out? (a) a vacuum cleaner (b) a fridge magnet (c) a magnetic chess set (d) a magnetic pin holder
24. 24.🧺 Do we need a mirror for the card-on-a-glass trick? (a) needed (b) not needed
25. 25.🥛 Why is it best to fill the glass right to the top? (a) little air left inside (b) it looks nicer (c) the card gets wet (d) water is heavier
26. 26.🥛 Which of these works by magnetism? (a) a drinking straw (b) a bicycle pump (c) a fridge magnet (d) a medicine dropper
27. 27.🔍 Which is the odd one out? (a) a medicine dropper (b) a drinking straw (c) a vacuum cleaner (d) a fridge magnet
28. 28.True or false: a compass needle works by air pressure. (a) False (b) True
29. 29.🧺 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 battery cell (c) a glass of water (d) a stiff postcard
30. 30.⚖️ 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) whether the card stays (c) the way we turn it (d) the same glass
31. 31.🥛 Does a suction hook work by air pressure or by magnetism? (a) air pressure (b) magnetism
32. 32.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is heavier (b) it will not break (c) it is hotter (d) it is magnetic
33. 33.⚖️ 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
34. 34.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) water is hiding there (b) the bottle is magnetic (c) the cap is sticky (d) air inside pushes back
35. 35.True or false: a glass of water is not needed for the card-on-a-glass trick. (a) False (b) True
36. 36.🔍 Which is the odd one out? (a) a magnetic pin holder (b) a drinking straw (c) a compass needle (d) a fridge magnet
37. 37.🧺 Which of these is needed for the card-on-a-glass trick? (a) a balloon (b) yeast (c) a towel (d) turmeric powder
38. 38.📘 Air presses on everything around us. What is this push called? (a) friction (b) magnetism (c) air pressure (d) sunlight
39. 39.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a magnetic chess set (c) a compass needle (d) a drinking straw
40. 40.🥛 Does a medicine dropper work by air pressure or by magnetism? (a) magnetism (b) air pressure

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