Capillary Action Flower Experiment Worksheet

Science experiments lesson 4: Colour-changing flower: capillary action · Set 245 · 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.🔍 Which is the odd one out? (a) a glass marble (b) a plastic ruler (c) a cotton thread (d) a piece of foil
2. 2.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? True or false: the length of the stem is the one thing we change. (a) True (b) False
3. 3.True or false: a rubber eraser lets water climb up it. (a) False (b) True
4. 4.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a few hours of waiting (b) food colour (c) a white flower (d) a mirror
5. 5.🔍 What do you see a day after a white flower stands in blue water? (a) the stem turns to ice (b) the petals turn bluish (c) the flower floats away (d) the water turns green
6. 6.⚖️ 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 change it (c) we keep it the same
7. 7.⚖️ 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) time for colour to show (c) the length of the stem (d) the kind of flower
8. 8.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a white flower (b) a glass of water (c) food colour (d) a magnet
9. 9.🛟 Who should trim the flower stem? (a) a toddler (b) anyone, without looking (c) a pet (d) a grown-up
10. 10.True or false: a glass of water is needed for the coloured flower experiment. (a) False (b) True
11. 11.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a few hours of waiting (b) a white flower (c) a battery cell (d) a glass of water
12. 12.💧 Dip a sugar cube into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
13. 13.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) food colour (b) yeast (c) a few hours of waiting (d) a glass of water
14. 14.🧺 Which of these is needed for the coloured flower experiment? (a) a magnet (b) yeast (c) a mirror (d) food colour
15. 15.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a few hours of waiting (b) a glass of water (c) turmeric powder (d) food colour
16. 16.True or false: a balloon is not needed for the coloured flower experiment. (a) True (b) False
17. 17.⚖️ 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 keep it the same (c) we measure it
18. 18.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a glass of water (b) a few hours of waiting (c) a balloon (d) a white flower
19. 19.True or false: a glass of water is not needed for the coloured flower experiment. (a) False (b) True
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 all turn green (b) they fall off at once (c) they turn two colours (d) they stay white
21. 21.True or false: turmeric powder is not needed for the coloured flower experiment. (a) True (b) False
22. 22.🧺 Do we need yeast for the coloured flower experiment? (a) needed (b) not needed
23. 23.True or false: yeast is not needed for the coloured flower experiment. (a) True (b) False
24. 24.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? What do we do with “the room it stands in”? (a) we keep it the same (b) we measure it (c) we change it
25. 25.True or false: a battery cell is needed for the coloured flower experiment. (a) False (b) True
26. 26.🔮 What would change if the flower stood in plain water? (a) the petals turn red (b) no colour change (c) the flower glows (d) the stem turns blue
27. 27.🛟 What should you do after handling food colour? (a) rub your eyes (b) wipe them on walls (c) lick your fingers (d) wash your hands
28. 28.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? What do we do with “the amount of water”? (a) we keep it the same (b) we measure it (c) we change it
29. 29.🧺 Which of these is not needed for the coloured flower experiment? (a) food colour (b) a white flower (c) a battery cell (d) a few hours of waiting
30. 30.True or false: a cotton thread does not let water climb. (a) True (b) False
31. 31.🧺 Which of these is needed for the coloured flower experiment? (a) a balloon (b) a glass of water (c) a mirror (d) a magnet
32. 32.🔍 Which is the odd one out? (a) a steel spoon (b) a rubber eraser (c) a strip of cloth (d) a piece of foil
33. 33.🔍 Which is the odd one out? (a) a paper towel (b) a glass marble (c) a piece of foil (d) a rubber eraser
34. 34.💧 Dip a piece of chalk into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
35. 35.🔮 Predict: a strip of paper towel dips into coloured water. What happens? (a) it sinks at once (b) nothing ever happens (c) colour climbs up it (d) it turns to plastic
36. 36.📘 What is it called when water climbs up thin tubes or paper by itself? (a) evaporation (b) melting (c) magnetism (d) capillary action
37. 37.True or false: a strip of cloth does not let water climb. (a) True (b) False
38. 38.🧺 Which of these is needed for the coloured flower experiment? (a) a few hours of waiting (b) a balloon (c) a mirror (d) turmeric powder
39. 39.🧺 Do we need a glass of water for the coloured flower experiment? (a) needed (b) not needed
40. 40.⚖️ 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 measure it (b) we change it (c) we keep it the same

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