Capillary Action Flower Experiment Worksheet

Science experiments lesson 4: Colour-changing flower: capillary action · Set 440 · 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.True or false: a balloon is not needed for the coloured flower experiment. (a) True (b) False
2. 2.🔮 What would change if the flower stood in plain water? (a) the stem turns blue (b) the petals turn red (c) the flower glows (d) no colour change
3. 3.True or false: a white flower is not needed for the coloured flower experiment. (a) False (b) True
4. 4.🛟 Who should trim the flower stem? (a) a toddler (b) a pet (c) anyone, without looking (d) a grown-up
5. 5.🧺 Which of these is not needed for the coloured flower experiment? (a) a white flower (b) a mirror (c) food colour (d) a few hours of waiting
6. 6.🔍 Which is the odd one out? (a) a sugar cube (b) a rubber eraser (c) a strip of cloth (d) a cotton thread
7. 7.⚖️ 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 room it stands in (b) the kind of flower (c) the length of the stem (d) the amount of colour
8. 8.💧 Which of these lets water climb up it? (a) a steel spoon (b) a piece of foil (c) a sugar cube (d) a plastic ruler
9. 9.🔮 Predict: a strip of paper towel dips into coloured water. What happens? (a) it sinks at once (b) it turns to plastic (c) nothing ever happens (d) colour climbs up it
10. 10.⚖️ 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
11. 11.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? True or false: time for colour to show is the one thing we change. (a) True (b) False
12. 12.True or false: food colour is not needed for the coloured flower experiment. (a) True (b) False
13. 13.⚖️ 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 water (c) the length of the stem
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 change it (c) we keep it the same
15. 15.⚖️ 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 kept the same. (a) False (b) True
16. 16.True or false: a cotton thread lets water climb up it. (a) False (b) True
17. 17.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) food colour (b) a glass of water (c) a white flower (d) turmeric powder
18. 18.True or false: a strip of cloth lets water climb up it. (a) False (b) True
19. 19.💧 Dip a sugar cube into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
20. 20.⚖️ 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 measure it (b) we change it (c) we keep it the same
21. 21.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a glass of water (b) a white flower (c) a few hours of waiting (d) a balloon
22. 22.True or false: a cotton thread does not let water climb. (a) False (b) True
23. 23.🧺 Do we need a white flower for the coloured flower experiment? (a) needed (b) not needed
24. 24.🌼 Why do the petals keep pulling water up the stem? (a) petals are magnetic (b) the stem is hot (c) petals lose water to air (d) petals like colour
25. 25.True or false: a strip of cloth does not let water climb. (a) True (b) False
26. 26.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? True or false: the kind of flower is the one thing we change. (a) False (b) True
27. 27.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? True or false: the amount of water is the one thing we change. (a) False (b) True
28. 28.⚖️ 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 room it stands in (b) the amount of colour (c) the amount of water (d) time for colour to show
29. 29.⚖️ 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) the kind of flower (c) time for colour to show
30. 30.True or false: a rubber eraser lets water climb up it. (a) False (b) True
31. 31.🧺 Which of these is needed for the coloured flower experiment? (a) turmeric powder (b) a magnet (c) yeast (d) food colour
32. 32.💧 Dip a piece of chalk into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
33. 33.🧺 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 mirror (d) food colour
34. 34.True or false: a steel spoon does not let water climb. (a) False (b) True
35. 35.⚖️ 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) True (b) False
36. 36.⚖️ 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 what we measure. (a) True (b) False
37. 37.🌼 How does coloured water reach the petals? (a) it rains on them (b) through tiny stem tubes (c) it is sprayed on (d) through the air
38. 38.🛟 What should you do after handling food colour? (a) rub your eyes (b) wipe them on walls (c) wash your hands (d) lick your fingers
39. 39.🧺 Do we need a battery cell for the coloured flower experiment? (a) not needed (b) needed
40. 40.⚖️ 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 room it stands in

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