Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 929 · 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 drinking straw works by air pressure. (a) True (b) False
2. 2.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a vacuum cleaner (c) a magnetic pin holder (d) a compass needle
3. 3.True or false: a compass needle works by air pressure. (a) True (b) False
4. 4.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is hotter (b) it is heavier (c) it will not break (d) it is magnetic
5. 5.🥛 Which of these works by magnetism? (a) a drinking straw (b) a fridge magnet (c) a medicine dropper (d) a bicycle pump
6. 6.⚖️ 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 card (c) how full the glass is
7. 7.True or false: yeast is needed for the card-on-a-glass trick. (a) True (b) False
8. 8.⚖️ 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) True (b) False
9. 9.🧺 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 stiff postcard (d) a battery cell
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) the way we turn it (c) how full the glass is
11. 11.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) water is hiding there (b) the cap is sticky (c) air inside pushes back (d) the bottle is magnetic
12. 12.🔍 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 water turns to ice (c) the card flies away (d) the glass breaks
13. 13.🥛 Does a drinking straw work by air pressure or by magnetism? (a) air pressure (b) magnetism
14. 14.🔍 Which is the odd one out? (a) a medicine dropper (b) a magnetic chess set (c) a drinking straw (d) a vacuum cleaner
15. 15.🧺 Do we need turmeric powder for the card-on-a-glass trick? (a) not needed (b) needed
16. 16.🛟 Where should you do the card-and-glass trick? (a) near a plug point (b) on a bed (c) over a laptop (d) over a sink or bucket
17. 17.⚖️ 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
18. 18.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a magnet (c) a glass of water (d) a stiff postcard
19. 19.🧺 Do we need a mirror for the card-on-a-glass trick? (a) not needed (b) needed
20. 20.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a towel (b) a battery cell (c) a stiff postcard (d) a glass of water
21. 21.🧺 Do we need a balloon for the card-on-a-glass trick? (a) needed (b) not needed
22. 22.⚖️ 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 measure it (b) we change it (c) we keep it the same
23. 23.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a magnetic pin holder (c) a magnetic chess set (d) a bicycle pump
24. 24.🔮 Predict: you blow up a balloon. What fills it? (a) water (b) smoke (c) sand (d) air
25. 25.⚖️ 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 measure it (b) we change it (c) we keep it the same
26. 26.True or false: a sink or a bucket is not needed for the card-on-a-glass trick. (a) False (b) True
27. 27.📘 Air presses on everything around us. What is this push called? (a) sunlight (b) air pressure (c) friction (d) magnetism
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 what we measure. (a) False (b) True
29. 29.🔍 Which is the odd one out? (a) a magnetic pin holder (b) a suction hook (c) a compass needle (d) a magnetic chess set
30. 30.⚖️ 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
31. 31.🥛 What holds the card up against the upside-down glass? (a) a magnet (b) the cold water (c) glue on the card (d) air pushing up
32. 32.⚖️ 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) the way we turn it (b) the same glass (c) whether the card stays (d) how full the glass is
33. 33.⚖️ 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
34. 34.🥛 Why is it best to fill the glass right to the top? (a) the card gets wet (b) little air left inside (c) water is heavier (d) it looks nicer
35. 35.🥛 Which of these works by magnetism? (a) a magnetic pin holder (b) a medicine dropper (c) a bicycle pump (d) a drinking straw
36. 36.🧺 Which of these is needed for the card-on-a-glass trick? (a) yeast (b) a magnet (c) a glass of water (d) a balloon
37. 37.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) not needed (b) needed
38. 38.True or false: a drinking straw works by magnetism. (a) True (b) False
39. 39.True or false: a vacuum cleaner works by magnetism. (a) True (b) False
40. 40.True or false: a suction hook works by magnetism. (a) True (b) False

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