Capillary Action Flower Experiment Worksheet

Science experiments lesson 4: Colour-changing flower: capillary action · Set 463 · 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.⚖️ 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 keep it the same (b) we change it (c) we measure it
2. 2.🧺 Which of these is not needed for the coloured flower experiment? (a) a white flower (b) food colour (c) yeast (d) a few hours of waiting
3. 3.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? True or false: the room it stands in is kept the same. (a) False (b) True
4. 4.🧺 Do we need a balloon for the coloured flower experiment? (a) needed (b) not needed
5. 5.💧 Dip a rubber eraser into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
6. 6.True or false: a plastic ruler lets water climb up it. (a) True (b) False
7. 7.🔮 What would change if the flower stood in plain water? (a) the petals turn red (b) the stem turns blue (c) no colour change (d) the flower glows
8. 8.🌼 Why do the petals keep pulling water up the stem? (a) petals like colour (b) petals lose water to air (c) petals are magnetic (d) the stem is hot
9. 9.🔮 Predict: a strip of paper towel dips into coloured water. What happens? (a) nothing ever happens (b) it sinks at once (c) colour climbs up it (d) it turns to plastic
10. 10.🛟 What should you do after handling food colour? (a) rub your eyes (b) lick your fingers (c) wipe them on walls (d) wash your hands
11. 11.True or false: a cotton thread lets water climb up it. (a) False (b) True
12. 12.🧺 Which of these is not needed for the coloured flower experiment? (a) a few hours of waiting (b) a glass of water (c) food colour (d) turmeric powder
13. 13.⚖️ 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) the amount of water (b) the amount of colour (c) the length of the stem (d) the kind of flower
14. 14.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? What do we do with “time for colour to show”? (a) we measure it (b) we keep it the same (c) we change it
15. 15.⚖️ 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 keep it the same (b) we change it (c) we measure it
16. 16.🧺 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) turmeric powder
17. 17.⚖️ 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 change it (b) we keep it the same (c) we measure it
18. 18.💧 Which of these lets water climb up it? (a) a plastic ruler (b) a glass marble (c) a steel spoon (d) a flower stem
19. 19.💧 Dip a plastic ruler into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
20. 20.🔍 Which is the odd one out? (a) a glass marble (b) a plastic ruler (c) a strip of cloth (d) a steel spoon
21. 21.🔍 Which is the odd one out? (a) a rubber eraser (b) a sugar cube (c) a piece of foil (d) a steel spoon
22. 22.🧺 Which of these is needed for the coloured flower experiment? (a) yeast (b) a balloon (c) a battery cell (d) a few hours of waiting
23. 23.🔍 What do you see a day after a white flower stands in blue water? (a) the stem turns to ice (b) the water turns green (c) the flower floats away (d) the petals turn bluish
24. 24.True or false: yeast is needed for the coloured flower experiment. (a) False (b) True
25. 25.💧 Dip a paper towel into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
26. 26.🧺 Which of these is needed for the coloured flower experiment? (a) a mirror (b) a magnet (c) a white flower (d) a battery cell
27. 27.True or false: a glass of water is not needed for the coloured flower experiment. (a) True (b) False
28. 28.True or false: a sugar cube lets water climb up it. (a) False (b) True
29. 29.⚖️ 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) False (b) True
30. 30.🧺 Do we need food colour for the coloured flower experiment? (a) needed (b) not needed
31. 31.True or false: a cotton thread does not let water climb. (a) False (b) True
32. 32.🧺 Do we need a battery cell for the coloured flower experiment? (a) needed (b) not needed
33. 33.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a white flower (b) food colour (c) a magnet (d) a glass of water
34. 34.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a white flower (b) a battery cell (c) a few hours of waiting (d) a glass of water
35. 35.💧 Which of these does not let water climb? (a) a paper towel (b) a piece of foil (c) a cotton thread (d) a sugar cube
36. 36.💧 Which of these does not let water climb? (a) a piece of chalk (b) a plastic ruler (c) a paper towel (d) a flower stem
37. 37.🔍 Which is the odd one out? (a) a steel spoon (b) a plastic ruler (c) a piece of foil (d) a flower stem
38. 38.📘 What is it called when water climbs up thin tubes or paper by itself? (a) evaporation (b) melting (c) magnetism (d) capillary action
39. 39.True or false: turmeric powder is needed for the coloured flower experiment. (a) False (b) True
40. 40.🛟 Who should trim the flower stem? (a) anyone, without looking (b) a grown-up (c) a toddler (d) a pet

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