Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 727 · 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.🥛 Which of these works by air pressure? (a) a magnetic chess set (b) a compass needle (c) a magnetic pin holder (d) a vacuum cleaner
2. 2.🥛 Does a suction hook work by air pressure or by magnetism? (a) air pressure (b) magnetism
3. 3.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is heavier (b) it is hotter (c) it is magnetic (d) it will not break
4. 4.🥛 What holds the card up against the upside-down glass? (a) the cold water (b) a magnet (c) glue on the card (d) air pushing up
5. 5.🥛 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
6. 6.🥤 Why does juice go up a drinking straw when you sip? (a) air pushes it up (b) the straw is hot (c) the straw is magnetic (d) juice likes plastic
7. 7.⚖️ 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
8. 8.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a towel (b) a glass of water (c) a stiff postcard (d) a magnet
9. 9.🔍 Which is the odd one out? (a) a drinking straw (b) a suction hook (c) a fridge magnet (d) a medicine dropper
10. 10.🥛 Does a compass needle work by air pressure or by magnetism? (a) magnetism (b) air pressure
11. 11.🛟 Where should you do the card-and-glass trick? (a) over a sink or bucket (b) near a plug point (c) over a laptop (d) on a bed
12. 12.⚖️ 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
13. 13.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) not needed (b) needed
14. 14.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a stiff postcard (b) a towel (c) a sink or a bucket (d) a battery cell
15. 15.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a medicine dropper (c) a compass needle (d) a magnetic chess set
16. 16.🧺 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) yeast
17. 17.🥛 Does a fridge magnet work by air pressure or by magnetism? (a) air pressure (b) magnetism
18. 18.🔍 Which is the odd one out? (a) a magnetic chess set (b) a bicycle pump (c) a drinking straw (d) a medicine dropper
19. 19.True or false: turmeric powder is needed for the card-on-a-glass trick. (a) True (b) False
20. 20.True or false: a glass of water is needed for the card-on-a-glass trick. (a) False (b) True
21. 21.True or false: a battery cell is needed for the card-on-a-glass trick. (a) False (b) True
22. 22.🧺 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 glass of water (c) a battery cell (d) a towel
23. 23.🥛 Does a drinking straw work by air pressure or by magnetism? (a) air pressure (b) magnetism
24. 24.🔍 Which is the odd one out? (a) a compass needle (b) a vacuum cleaner (c) a magnetic pin holder (d) a fridge magnet
25. 25.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a sink or a bucket (b) turmeric powder (c) a stiff postcard (d) a towel
26. 26.⚖️ 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
27. 27.True or false: a balloon is not needed for the card-on-a-glass trick. (a) False (b) True
28. 28.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same card is the one thing we change. (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 glass of water (b) a stiff postcard (c) a magnet (d) a towel
30. 30.True or false: a medicine dropper works by magnetism. (a) True (b) False
31. 31.⚖️ 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) True (b) False
32. 32.📘 Air presses on everything around us. What is this push called? (a) friction (b) magnetism (c) sunlight (d) air pressure
33. 33.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a towel (c) a balloon (d) a glass of water
34. 34.🥛 Which of these works by air pressure? (a) a magnetic chess set (b) a compass needle (c) a bicycle pump (d) a magnetic pin holder
35. 35.⚖️ 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) False (b) True
36. 36.🧺 Which of these is needed for the card-on-a-glass trick? (a) a battery cell (b) yeast (c) a sink or a bucket (d) a mirror
37. 37.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the bottle is magnetic (b) air inside pushes back (c) water is hiding there (d) the cap is sticky
38. 38.🧺 Which of these is not needed for the card-on-a-glass trick? (a) turmeric powder (b) a sink or a bucket (c) a towel (d) a stiff postcard
39. 39.🔍 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 card flies away (c) the water turns to ice (d) the glass breaks
40. 40.🥛 Does a magnetic pin holder work by air pressure or by magnetism? (a) air pressure (b) magnetism

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