Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 600 · 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.🥛 What holds the card up against the upside-down glass? (a) a magnet (b) glue on the card (c) the cold water (d) air pushing up
2. 2.🔍 Which is the odd one out? (a) a magnetic pin holder (b) a drinking straw (c) a compass needle (d) a fridge magnet
3. 3.🥛 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
4. 4.⚖️ 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 change it (b) we keep it the same (c) we measure it
5. 5.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) not needed (b) needed
6. 6.🥛 Which of these works by magnetism? (a) a suction hook (b) a drinking straw (c) a compass needle (d) a medicine dropper
7. 7.🥛 Which of these works by magnetism? (a) a vacuum cleaner (b) a suction hook (c) a drinking straw (d) a magnetic pin holder
8. 8.🧺 Do we need a battery cell for the card-on-a-glass trick? (a) not needed (b) needed
9. 9.🥤 Why does juice go up a drinking straw when you sip? (a) the straw is hot (b) juice likes plastic (c) the straw is magnetic (d) air pushes it up
10. 10.⚖️ 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 way we turn it
11. 11.⚖️ 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
12. 12.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a mirror (b) a towel (c) a sink or a bucket (d) a glass of water
13. 13.🥛 Which of these works by air pressure? (a) a compass needle (b) a suction hook (c) a magnetic pin holder (d) a magnetic chess set
14. 14.🔍 Which is the odd one out? (a) a compass needle (b) a bicycle pump (c) a fridge magnet (d) a magnetic pin holder
15. 15.🥛 Does a fridge magnet work by air pressure or by magnetism? (a) magnetism (b) air pressure
16. 16.⚖️ 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
17. 17.True or false: a drinking straw works by magnetism. (a) True (b) False
18. 18.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a mirror (b) a towel (c) a sink or a bucket (d) a glass of water
19. 19.🧺 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 battery cell (d) a stiff postcard
20. 20.⚖️ 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
21. 21.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) water is hiding there (b) air inside pushes back (c) the cap is sticky (d) the bottle is magnetic
22. 22.⚖️ 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) True (b) False
23. 23.⚖️ 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) the same glass (c) the same card (d) how full the glass is
24. 24.🔍 Which is the odd one out? (a) a magnetic pin holder (b) a medicine dropper (c) a fridge magnet (d) a compass needle
25. 25.True or false: a towel is not needed for the card-on-a-glass trick. (a) False (b) True
26. 26.📘 Air presses on everything around us. What is this push called? (a) friction (b) air pressure (c) sunlight (d) magnetism
27. 27.True or false: a sink or a bucket is not needed for the card-on-a-glass trick. (a) False (b) True
28. 28.True or false: turmeric powder is needed for the card-on-a-glass trick. (a) True (b) False
29. 29.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a balloon (b) a towel (c) a stiff postcard (d) a sink or a bucket
30. 30.True or false: a mirror is needed for the card-on-a-glass trick. (a) True (b) False
31. 31.True or false: a bicycle pump works by magnetism. (a) True (b) False
32. 32.🧺 Do we need a magnet for the card-on-a-glass trick? (a) not needed (b) needed
33. 33.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) turmeric powder (b) a glass of water (c) a sink or a bucket (d) a towel
34. 34.True or false: a suction hook works by magnetism. (a) False (b) True
35. 35.🛟 Where should you do the card-and-glass trick? (a) over a sink or bucket (b) on a bed (c) near a plug point (d) over a laptop
36. 36.True or false: a compass needle works by magnetism. (a) True (b) False
37. 37.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a glass of water (c) a stiff postcard (d) a balloon
38. 38.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) yeast (b) a sink or a bucket (c) a stiff postcard (d) a glass of water
39. 39.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “the way we turn it”? (a) we change it (b) we keep it the same (c) we measure it
40. 40.🥛 Which of these works by magnetism? (a) a fridge magnet (b) a bicycle pump (c) a vacuum cleaner (d) a drinking straw

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