Capillary Action Flower Experiment Worksheet

Science experiments lesson 4: Colour-changing flower: capillary action · Set 914 · 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? True or false: time for colour to show is kept the same. (a) True (b) False
2. 2.🌼 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
3. 3.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a battery cell (b) food colour (c) a few hours of waiting (d) a glass of water
4. 4.True or false: a sugar cube lets water climb up it. (a) False (b) True
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 battery cell is needed for the coloured flower experiment. (a) True (b) False
7. 7.💧 Which of these does not let water climb? (a) a glass marble (b) a cotton thread (c) a paper towel (d) a strip of cloth
8. 8.⚖️ 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 amount of colour
9. 9.🧺 Do we need a balloon for the coloured flower experiment? (a) needed (b) not needed
10. 10.⚖️ 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
11. 11.💧 Which of these lets water climb up it? (a) a rubber eraser (b) a steel spoon (c) a piece of foil (d) a sugar cube
12. 12.⚖️ 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
13. 13.🧺 Which of these is not needed for the coloured flower experiment? (a) a glass of water (b) a white flower (c) turmeric powder (d) food colour
14. 14.True or false: a battery cell is not needed for the coloured flower experiment. (a) True (b) False
15. 15.True or false: turmeric powder is needed for the coloured flower experiment. (a) True (b) False
16. 16.🔍 What do you see a day after a white flower stands in blue water? (a) the petals turn bluish (b) the stem turns to ice (c) the water turns green (d) the flower floats away
17. 17.💧 Which of these does not let water climb? (a) a sugar cube (b) a paper towel (c) a plastic ruler (d) a piece of chalk
18. 18.True or false: a paper towel lets water climb up it. (a) True (b) False
19. 19.⚖️ 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) False (b) True
20. 20.⚖️ 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) the room it stands in (c) the amount of water (d) the length of the stem
21. 21.🛟 What should you do after handling food colour? (a) lick your fingers (b) rub your eyes (c) wash your hands (d) wipe them on walls
22. 22.⚖️ 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
23. 23.True or false: a sugar cube does not let water climb. (a) True (b) False
24. 24.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) yeast (b) a glass of water (c) food colour (d) a white flower
25. 25.🧺 Which of these is needed for the coloured flower experiment? (a) a glass of water (b) a mirror (c) a balloon (d) a battery cell
26. 26.🧺 Which of these is not needed for the coloured flower experiment? (a) yeast (b) a white flower (c) food colour (d) a few hours of waiting
27. 27.🧺 Do we need food colour for the coloured flower experiment? (a) needed (b) not needed
28. 28.⚖️ 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
29. 29.💧 Which of these lets water climb up it? (a) a piece of foil (b) a glass marble (c) a paper towel (d) a rubber eraser
30. 30.🧺 Do we need turmeric powder for the coloured flower experiment? (a) not needed (b) needed
31. 31.📘 What is it called when water climbs up thin tubes or paper by itself? (a) magnetism (b) melting (c) evaporation (d) capillary action
32. 32.True or false: turmeric powder is not needed for the coloured flower experiment. (a) True (b) False
33. 33.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? Which of these is what we measure? (a) time for colour to show (b) the room it stands in (c) the length of the stem (d) the kind of flower
34. 34.🛟 Who should trim the flower stem? (a) a grown-up (b) a pet (c) anyone, without looking (d) a toddler
35. 35.💧 Which of these lets water climb up it? (a) a piece of foil (b) a steel spoon (c) a plastic ruler (d) a strip of cloth
36. 36.🔮 Predict: a strip of paper towel dips into coloured water. What happens? (a) nothing ever happens (b) it turns to plastic (c) it sinks at once (d) colour climbs up it
37. 37.💧 Which of these lets water climb up it? (a) a piece of foil (b) a plastic ruler (c) a steel spoon (d) a flower stem
38. 38.🔮 What would change if the flower stood in plain water? (a) the flower glows (b) the stem turns blue (c) no colour change (d) the petals turn red
39. 39.🔍 Which is the odd one out? (a) a piece of chalk (b) a rubber eraser (c) a piece of foil (d) a glass marble
40. 40.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a magnet (b) a few hours of waiting (c) food colour (d) a glass of water

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