Capillary Action Flower Experiment Worksheet

Science experiments lesson 4: Colour-changing flower: capillary action · Set 201 · 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 is it called when water climbs up thin tubes or paper by itself? (a) melting (b) evaporation (c) capillary action (d) magnetism
2. 2.💧 Dip a glass marble into coloured water. Does the water climb up it? (a) water climbs up it (b) water does not climb
3. 3.⚖️ 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 water (b) the length of the stem (c) time for colour to show (d) the amount of colour
4. 4.True or false: a white flower is needed for the coloured flower experiment. (a) False (b) True
5. 5.💧 Dip a flower stem into coloured water. Does the water climb up it? (a) water climbs up it (b) water does not climb
6. 6.🔍 What do you see a day after a white flower stands in blue water? (a) the flower floats away (b) the petals turn bluish (c) the water turns green (d) the stem turns to ice
7. 7.🌼 Why do the petals keep pulling water up the stem? (a) petals like colour (b) the stem is hot (c) petals are magnetic (d) petals lose water to air
8. 8.🔮 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 stay white (d) they all turn green
9. 9.🔍 Which is the odd one out? (a) a strip of cloth (b) a rubber eraser (c) a plastic ruler (d) a piece of foil
10. 10.True or false: a few hours of waiting is not needed for the coloured flower experiment. (a) True (b) False
11. 11.🧺 Which of these is not needed for the coloured flower experiment? (a) a few hours of waiting (b) food colour (c) a mirror (d) a white flower
12. 12.⚖️ 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 colour (b) time for colour to show (c) the length of the stem (d) the kind of flower
13. 13.True or false: yeast is needed for the coloured flower experiment. (a) False (b) True
14. 14.🧺 Do we need yeast for the coloured flower experiment? (a) not needed (b) needed
15. 15.💧 Dip a paper towel into coloured water. Does the water climb up it? (a) water climbs up it (b) water does not climb
16. 16.💧 Dip a rubber eraser into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
17. 17.🌼 How does coloured water reach the petals? (a) through the air (b) it is sprayed on (c) it rains on them (d) through tiny stem tubes
18. 18.🧺 Which of these is needed for the coloured flower experiment? (a) turmeric powder (b) yeast (c) a few hours of waiting (d) a magnet
19. 19.True or false: yeast is not needed for the coloured flower experiment. (a) True (b) False
20. 20.🧺 Do we need a mirror for the coloured flower experiment? (a) not needed (b) needed
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 water”? (a) we keep it the same (b) we measure it (c) we change it
22. 22.True or false: a glass of water is needed for the coloured flower experiment. (a) False (b) True
23. 23.🛟 What should you do after handling food colour? (a) wash your hands (b) rub your eyes (c) lick your fingers (d) wipe them on walls
24. 24.🔍 Which is the odd one out? (a) a strip of cloth (b) a cotton thread (c) a sugar cube (d) a piece of foil
25. 25.🧺 Do we need a white flower for the coloured flower experiment? (a) not needed (b) needed
26. 26.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a white flower (b) a few hours of waiting (c) food colour (d) a mirror
27. 27.True or false: food colour is not needed for the coloured flower experiment. (a) True (b) False
28. 28.🔮 What would change if the flower stood in plain water? (a) no colour change (b) the stem turns blue (c) the petals turn red (d) the flower glows
29. 29.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a white flower (b) food colour (c) turmeric powder (d) a glass of water
30. 30.🧺 Which of these is needed for the coloured flower experiment? (a) a battery cell (b) a white flower (c) a balloon (d) turmeric powder
31. 31.True or false: a balloon is not needed for the coloured flower experiment. (a) False (b) True
32. 32.True or false: a battery cell is not needed for the coloured flower experiment. (a) False (b) True
33. 33.True or false: turmeric powder is needed for the coloured flower experiment. (a) True (b) False
34. 34.🔍 Which is the odd one out? (a) a flower stem (b) a steel spoon (c) a paper towel (d) a piece of chalk
35. 35.💧 Dip a piece of foil into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
36. 36.True or false: a piece of foil does not let water climb. (a) True (b) False
37. 37.True or false: a balloon is needed for the coloured flower experiment. (a) True (b) False
38. 38.⚖️ 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
39. 39.🔍 Which is the odd one out? (a) a piece of chalk (b) a rubber eraser (c) a cotton thread (d) a paper towel
40. 40.🧺 Which of these is needed for the coloured flower experiment? (a) turmeric powder (b) yeast (c) a magnet (d) food colour

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