Capillary Action Flower Experiment Worksheet

Science experiments lesson 4: Colour-changing flower: capillary action · Set 41 · 40 questions

What you do (Water climbs thin tubes): 1. Mix food colour into a glass of water. 2. An adult trims the flower stem and stands it in the coloured water. 3. Check the petals every few hours and draw what you see. 4. Wash your hands after handling food colour.

1. 1.🔍 What do you see a day after a white flower stands in blue water? (a) the stem turns to ice (b) the flower floats away (c) the petals turn bluish (d) the water turns green
2. 2.🧺 Which of these is not needed for the coloured flower experiment? (a) a glass of water (b) a white flower (c) a few hours of waiting (d) a magnet
3. 3.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? What do we do with “the length of the stem”? (a) we change it (b) we measure it (c) we keep it the same
4. 4.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? Which of these is what we measure? (a) the amount of colour (b) the kind of flower (c) the amount of water (d) time for colour to show
5. 5.True or false: a few hours of waiting is needed for the coloured flower experiment. (a) False (b) True
6. 6.True or false: a glass of water is needed for the coloured flower experiment. (a) True (b) False
7. 7.True or false: a few hours of waiting is not needed for the coloured flower experiment. (a) True (b) False
8. 8.🛟 Who should trim the flower stem? (a) a pet (b) a grown-up (c) a toddler (d) anyone, without looking
9. 9.True or false: food colour is needed for the coloured flower experiment. (a) False (b) True
10. 10.🔍 Which is the odd one out? (a) a plastic ruler (b) a cotton thread (c) a paper towel (d) a strip of cloth
11. 11.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) food colour (b) a balloon (c) a few hours of waiting (d) a white flower
12. 12.💧 Which of these does not let water climb? (a) a strip of cloth (b) a flower stem (c) a cotton thread (d) a plastic ruler
13. 13.🧺 Do we need a glass of water for the coloured flower experiment? (a) not needed (b) needed
14. 14.🧺 Do we need a balloon for the coloured flower experiment? (a) not needed (b) needed
15. 15.🔍 Which is the odd one out? (a) a strip of cloth (b) a glass marble (c) a plastic ruler (d) a rubber eraser
16. 16.🧺 Which of these is needed for the coloured flower experiment? (a) a few hours of waiting (b) a battery cell (c) yeast (d) a magnet
17. 17.🛟 What should you do after handling food colour? (a) rub your eyes (b) wash your hands (c) wipe them on walls (d) lick your fingers
18. 18.🔍 Which is the odd one out? (a) a rubber eraser (b) a plastic ruler (c) a piece of foil (d) a cotton thread
19. 19.🧺 Do we need a few hours of waiting for the coloured flower experiment? (a) not needed (b) needed
20. 20.🔮 Predict: a stem is split in two, one half in red water and one in blue. What do the petals do? (a) they stay white (b) they fall off at once (c) they turn two colours (d) they all turn green
21. 21.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? What do we do with “the amount of colour”? (a) we change it (b) we measure it (c) we keep it the same
22. 22.True or false: a battery cell is needed for the coloured flower experiment. (a) False (b) True
23. 23.True or false: a glass of water is not needed for the coloured flower experiment. (a) False (b) True
24. 24.True or false: a steel spoon does not let water climb. (a) True (b) False
25. 25.💧 Which of these does not let water climb? (a) a rubber eraser (b) a cotton thread (c) a strip of cloth (d) a paper towel
26. 26.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? Which of these is kept the same? (a) the length of the stem (b) time for colour to show (c) the kind of flower
27. 27.🌼 How does coloured water reach the petals? (a) through the air (b) it rains on them (c) through tiny stem tubes (d) it is sprayed on
28. 28.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? True or false: the amount of colour is kept the same. (a) True (b) False
29. 29.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a few hours of waiting (b) a mirror (c) a white flower (d) a glass of water
30. 30.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? Which of these is the one thing we change? (a) time for colour to show (b) the length of the stem (c) the amount of colour (d) the kind of flower
31. 31.True or false: a paper towel does not let water climb. (a) True (b) False
32. 32.🧺 Do we need a mirror for the coloured flower experiment? (a) needed (b) not needed
33. 33.💧 Dip a plastic ruler into coloured water. Does the water climb up it? (a) water climbs up it (b) water does not climb
34. 34.True or false: a white flower is needed for the coloured flower experiment. (a) True (b) False
35. 35.True or false: turmeric powder is not needed for the coloured flower experiment. (a) False (b) True
36. 36.🔮 What would change if the flower stood in plain water? (a) no colour change (b) the stem turns blue (c) the flower glows (d) the petals turn red
37. 37.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? What do we do with “the kind of flower”? (a) we measure it (b) we keep it the same (c) we change it
38. 38.🔍 Which is the odd one out? (a) a piece of foil (b) a sugar cube (c) a strip of cloth (d) a flower stem
39. 39.🔮 Predict: a strip of paper towel dips into coloured water. What happens? (a) colour climbs up it (b) it turns to plastic (c) nothing ever happens (d) it sinks at once
40. 40.True or false: a glass marble does not let water climb. (a) False (b) True

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