Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 171 · 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.True or false: a magnet is not needed for the card-on-a-glass trick. (a) True (b) False
2. 2.⚖️ 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
3. 3.⚖️ 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 keep it the same (b) we change it (c) we measure it
4. 4.⚖️ 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) the way we turn it (c) whether the card stays
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 battery cell (c) a stiff postcard (d) a sink or a bucket
6. 6.True or false: a towel is needed for the card-on-a-glass trick. (a) True (b) False
7. 7.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a towel (b) a stiff postcard (c) a battery cell (d) a sink or a bucket
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) how full the glass is (b) the same card (c) the way we turn it (d) the same glass
9. 9.🥤 Why does juice go up a drinking straw when you sip? (a) the straw is hot (b) air pushes it up (c) juice likes plastic (d) the straw is magnetic
10. 10.True or false: a suction hook works by magnetism. (a) False (b) True
11. 11.⚖️ 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 keep it the same (b) we change it (c) we measure it
12. 12.True or false: a magnetic chess set works by air pressure. (a) True (b) False
13. 13.🥛 Which of these works by air pressure? (a) a medicine dropper (b) a compass needle (c) a fridge magnet (d) a magnetic chess set
14. 14.🔮 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
15. 15.🔮 Predict: you blow up a balloon. What fills it? (a) sand (b) air (c) water (d) smoke
16. 16.🔮 Why do we try the card trick over a sink or a bucket? (a) to make it rain (b) to grow plants (c) to cool the glass (d) to catch any spills
17. 17.🥛 Which of these works by magnetism? (a) a drinking straw (b) a bicycle pump (c) a medicine dropper (d) a magnetic pin holder
18. 18.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a balloon (c) a sink or a bucket (d) a glass of water
19. 19.True or false: a mirror is needed for the card-on-a-glass trick. (a) True (b) False
20. 20.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) needed (b) not needed
21. 21.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) a mirror (c) a sink or a bucket (d) a glass of water
22. 22.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) turmeric powder (b) a stiff postcard (c) a sink or a bucket (d) a glass of water
23. 23.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a compass needle (c) a suction hook (d) a magnetic pin holder
24. 24.📘 Air presses on everything around us. What is this push called? (a) friction (b) magnetism (c) sunlight (d) air pressure
25. 25.🥛 Which of these works by air pressure? (a) a magnetic pin holder (b) a compass needle (c) a bicycle pump (d) a fridge magnet
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) whether the card stays (b) the same glass (c) how full the glass is
27. 27.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is heavier (b) it is magnetic (c) it will not break (d) it is hotter
28. 28.🧺 Which of these is needed for the card-on-a-glass trick? (a) yeast (b) turmeric powder (c) a magnet (d) a towel
29. 29.🔍 Which is the odd one out? (a) a compass needle (b) a bicycle pump (c) a magnetic pin holder (d) a fridge magnet
30. 30.🔍 Which is the odd one out? (a) a compass needle (b) a bicycle pump (c) a suction hook (d) a drinking straw
31. 31.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same glass is what we measure. (a) False (b) True
32. 32.🥛 Which of these works by air pressure? (a) a magnetic chess set (b) a drinking straw (c) a fridge magnet (d) a magnetic pin holder
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) False (b) True
34. 34.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a sink or a bucket (c) a magnet (d) a towel
35. 35.🔍 Which is the odd one out? (a) a magnetic pin holder (b) a compass needle (c) a drinking straw (d) a magnetic chess set
36. 36.⚖️ 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) the same card (c) whether the card stays (d) the way we turn it
37. 37.🥛 Why is it best to fill the glass right to the top? (a) water is heavier (b) the card gets wet (c) little air left inside (d) it looks nicer
38. 38.🔍 Which is the odd one out? (a) a suction hook (b) a compass needle (c) a magnetic chess set (d) a magnetic pin holder
39. 39.🧺 Which of these is needed for the card-on-a-glass trick? (a) a balloon (b) a magnet (c) a sink or a bucket (d) a mirror
40. 40.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) needed (b) not needed

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