Capillary Action Flower Experiment Worksheet

Science experiments lesson 4: Colour-changing flower: capillary action · Set 200 · 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 water turns green (b) the flower floats away (c) the petals turn bluish (d) the stem turns to ice
2. 2.True or false: a mirror is not needed for the coloured flower experiment. (a) False (b) True
3. 3.💧 Which of these lets water climb up it? (a) a piece of foil (b) a cotton thread (c) a glass marble (d) a plastic ruler
4. 4.💧 Dip a piece of foil into coloured water. Does the water climb up it? (a) water climbs up it (b) water does not climb
5. 5.⚖️ 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 kind of flower (c) the length of the stem (d) the amount of colour
6. 6.🛟 What should you do after handling food colour? (a) wash your hands (b) rub your eyes (c) wipe them on walls (d) lick your fingers
7. 7.🔮 Predict: a stem is split in two, one half in red water and one in blue. What do the petals do? (a) they turn two colours (b) they fall off at once (c) they all turn green (d) they stay white
8. 8.🛟 Who should trim the flower stem? (a) a pet (b) anyone, without looking (c) a toddler (d) a grown-up
9. 9.💧 Which of these does not let water climb? (a) a paper towel (b) a cotton thread (c) a piece of chalk (d) a steel spoon
10. 10.🧺 Which of these is needed for the coloured flower experiment? (a) a battery cell (b) a magnet (c) a white flower (d) a mirror
11. 11.🔍 Which is the odd one out? (a) a glass marble (b) a rubber eraser (c) a sugar cube (d) a steel spoon
12. 12.🧺 Which of these is needed for the coloured flower experiment? (a) turmeric powder (b) food colour (c) a magnet (d) a battery cell
13. 13.True or false: a white flower is not needed for the coloured flower experiment. (a) True (b) False
14. 14.True or false: a strip of cloth lets water climb up it. (a) True (b) False
15. 15.🧺 Do we need a glass of water for the coloured flower experiment? (a) not needed (b) needed
16. 16.💧 Dip a sugar cube into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
17. 17.🔮 What would change if the flower stood in plain water? (a) the flower glows (b) no colour change (c) the stem turns blue (d) the petals turn red
18. 18.⚖️ 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
19. 19.⚖️ 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 measure it (b) we keep it the same (c) we change it
20. 20.True or false: food colour is not needed for the coloured flower experiment. (a) False (b) True
21. 21.🧺 Which of these is not needed for the coloured flower experiment? (a) turmeric powder (b) a few hours of waiting (c) a white flower (d) a glass of water
22. 22.🌼 Why do the petals keep pulling water up the stem? (a) petals like colour (b) petals are magnetic (c) the stem is hot (d) petals lose water to air
23. 23.💧 Dip a rubber eraser into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
24. 24.🌼 How does coloured water reach the petals? (a) it rains on them (b) it is sprayed on (c) through the air (d) through tiny stem tubes
25. 25.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? Which of these is kept the same? (a) time for colour to show (b) the amount of colour (c) the length of the stem
26. 26.🔮 Predict: a strip of paper towel dips into coloured water. What happens? (a) it sinks at once (b) colour climbs up it (c) nothing ever happens (d) it turns to plastic
27. 27.📘 What is it called when water climbs up thin tubes or paper by itself? (a) evaporation (b) capillary action (c) melting (d) magnetism
28. 28.🧺 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 balloon (d) food colour
29. 29.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a white flower (b) a magnet (c) a glass of water (d) food colour
30. 30.🧺 Do we need yeast for the coloured flower experiment? (a) not needed (b) needed
31. 31.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) yeast (b) a glass of water (c) a white flower (d) food colour
32. 32.🧺 Do we need turmeric powder for the coloured flower experiment? (a) not needed (b) needed
33. 33.True or false: a cotton thread does not let water climb. (a) True (b) False
34. 34.🔍 Which is the odd one out? (a) a strip of cloth (b) a flower stem (c) a plastic ruler (d) a sugar cube
35. 35.⚖️ 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
36. 36.⚖️ 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 keep it the same (c) we change it
37. 37.🧺 Which of these is not needed for the coloured flower experiment? (a) a white flower (b) a glass of water (c) food colour (d) a mirror
38. 38.💧 Dip a paper towel into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
39. 39.💧 Which of these lets water climb up it? (a) a rubber eraser (b) a plastic ruler (c) a paper towel (d) a piece of foil
40. 40.🔍 Which is the odd one out? (a) a piece of chalk (b) a piece of foil (c) a steel spoon (d) a rubber eraser

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