Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 174 · 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.🧺 Do we need a balloon for the card-on-a-glass trick? (a) needed (b) not needed
2. 2.🧺 Do we need turmeric powder for the card-on-a-glass trick? (a) needed (b) not needed
3. 3.True or false: a balloon is needed for the card-on-a-glass trick. (a) False (b) True
4. 4.🛟 Why is a plastic cup safer than a glass for small children here? (a) it will not break (b) it is magnetic (c) it is heavier (d) it is hotter
5. 5.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the water turns to ice (b) the card flies away (c) the card stays on (d) the glass breaks
6. 6.⚖️ 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 keep it the same (b) we measure it (c) we change it
7. 7.True or false: a magnet is not needed for the card-on-a-glass trick. (a) False (b) True
8. 8.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a magnet (b) a glass of water (c) a towel (d) a sink or a bucket
9. 9.🔍 Which is the odd one out? (a) a magnetic chess set (b) a magnetic pin holder (c) a compass needle (d) a suction hook
10. 10.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a sink or a bucket (c) a towel (d) yeast
11. 11.True or false: a suction hook works by magnetism. (a) True (b) False
12. 12.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a glass of water (c) a sink or a bucket (d) a balloon
13. 13.True or false: a magnetic pin holder works by air pressure. (a) False (b) True
14. 14.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) turmeric powder (b) a towel (c) a stiff postcard (d) a sink or a bucket
15. 15.🔍 Which is the odd one out? (a) a magnetic chess set (b) a fridge magnet (c) a medicine dropper (d) a compass needle
16. 16.🛟 Where should you do the card-and-glass trick? (a) near a plug point (b) on a bed (c) over a sink or bucket (d) over a laptop
17. 17.True or false: a drinking straw works by magnetism. (a) True (b) False
18. 18.🧺 Which of these is needed for the card-on-a-glass trick? (a) a stiff postcard (b) turmeric powder (c) a balloon (d) yeast
19. 19.🥛 Which of these works by air pressure? (a) a magnetic pin holder (b) a magnetic chess set (c) a medicine dropper (d) a compass needle
20. 20.🥤 Why does juice go up a drinking straw when you sip? (a) juice likes plastic (b) the straw is hot (c) air pushes it up (d) the straw is magnetic
21. 21.📘 Air presses on everything around us. What is this push called? (a) magnetism (b) friction (c) air pressure (d) sunlight
22. 22.🔍 Which is the odd one out? (a) a magnetic chess set (b) a suction hook (c) a vacuum cleaner (d) a drinking straw
23. 23.⚖️ 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 measure it (c) we keep it the same
24. 24.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the way we turn it is kept the same. (a) True (b) False
25. 25.🥛 Does a fridge magnet work by air pressure or by magnetism? (a) magnetism (b) air pressure
26. 26.⚖️ 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 way we turn it (c) the same glass (d) the same card
27. 27.🧺 Which of these is needed for the card-on-a-glass trick? (a) a balloon (b) a magnet (c) a mirror (d) a glass of water
28. 28.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) a sink or a bucket (c) a glass of water (d) a mirror
29. 29.🥛 What holds the card up against the upside-down glass? (a) a magnet (b) the cold water (c) air pushing up (d) glue on the card
30. 30.🥛 Which of these works by air pressure? (a) a compass needle (b) a fridge magnet (c) a suction hook (d) a magnetic chess set
31. 31.🔍 Which is the odd one out? (a) a fridge magnet (b) a drinking straw (c) a bicycle pump (d) a suction hook
32. 32.⚖️ 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) True (b) False
33. 33.⚖️ 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) how full the glass is (c) the way we turn it (d) the same glass
34. 34.🥛 Which of these works by air pressure? (a) a magnetic chess set (b) a drinking straw (c) a magnetic pin holder (d) a compass needle
35. 35.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the cap is sticky (b) the bottle is magnetic (c) water is hiding there (d) air inside pushes back
36. 36.🥛 Which of these works by magnetism? (a) a vacuum cleaner (b) a drinking straw (c) a suction hook (d) a magnetic pin holder
37. 37.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same card is what we measure. (a) True (b) False
38. 38.True or false: a magnetic pin holder works by magnetism. (a) False (b) True
39. 39.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) not needed (b) needed
40. 40.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the way we turn it is the one thing we change. (a) True (b) False

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