Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 563 · 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.⚖️ 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 change it (b) we keep it the same (c) we measure it
2. 2.⚖️ 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
3. 3.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: how full the glass is is the one thing we change. (a) False (b) True
4. 4.True or false: a bicycle pump works by air pressure. (a) False (b) True
5. 5.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) not needed (b) needed
6. 6.True or false: a drinking straw works by air pressure. (a) False (b) True
7. 7.⚖️ 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
8. 8.🧺 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 battery cell
9. 9.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a towel (b) a mirror (c) a glass of water (d) a sink or a bucket
10. 10.True or false: a suction hook works by air pressure. (a) False (b) True
11. 11.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a mirror (c) a glass of water (d) a towel
12. 12.🥛 Which of these works by air pressure? (a) a magnetic chess set (b) a suction hook (c) a fridge magnet (d) a compass needle
13. 13.⚖️ 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 change it (b) we keep it the same (c) we measure it
14. 14.🥛 Which of these works by air pressure? (a) a vacuum cleaner (b) a fridge magnet (c) a compass needle (d) a magnetic pin holder
15. 15.🛟 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
16. 16.🧺 Do we need a magnet for the card-on-a-glass trick? (a) needed (b) not needed
17. 17.⚖️ 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 way we turn it (b) the same glass (c) whether the card stays (d) the same card
18. 18.🥛 Does a drinking straw work by air pressure or by magnetism? (a) air pressure (b) magnetism
19. 19.🔮 Predict: you blow up a balloon. What fills it? (a) sand (b) water (c) smoke (d) air
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 same glass (c) how full the glass is
21. 21.🧺 Which of these is needed for the card-on-a-glass trick? (a) a stiff postcard (b) a balloon (c) yeast (d) a magnet
22. 22.🧺 Which of these is needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a battery cell (c) yeast (d) a mirror
23. 23.⚖️ 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
24. 24.⚖️ 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) whether the card stays (b) the same glass (c) how full the glass is (d) the same card
25. 25.🔮 Why do we try the card trick over a sink or a bucket? (a) to cool the glass (b) to grow plants (c) to make it rain (d) to catch any spills
26. 26.🧺 Do we need a towel for the card-on-a-glass trick? (a) needed (b) not needed
27. 27.🔍 Which is the odd one out? (a) a suction hook (b) a fridge magnet (c) a compass needle (d) a magnetic chess set
28. 28.🧺 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 sink or a bucket (d) turmeric powder
29. 29.🔍 Which is the odd one out? (a) a magnetic chess set (b) a fridge magnet (c) a medicine dropper (d) a compass needle
30. 30.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: how full the glass is is kept the same. (a) False (b) True
31. 31.🧺 Do we need turmeric powder for the card-on-a-glass trick? (a) needed (b) not needed
32. 32.🔍 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
33. 33.📘 Air presses on everything around us. What is this push called? (a) magnetism (b) friction (c) sunlight (d) air pressure
34. 34.⚖️ 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
35. 35.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) needed (b) not needed
36. 36.🔍 Which is the odd one out? (a) a compass needle (b) a bicycle pump (c) a magnetic pin holder (d) a fridge magnet
37. 37.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the cap is sticky (b) air inside pushes back (c) the bottle is magnetic (d) water is hiding there
38. 38.🧺 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 glass of water (d) a battery cell
39. 39.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a balloon (c) a sink or a bucket (d) a stiff postcard
40. 40.True or false: a stiff postcard is not needed for the card-on-a-glass trick. (a) True (b) False

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