Capillary Action Flower Experiment Worksheet

Science experiments lesson 4: Colour-changing flower: capillary action · Set 548 · 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.💧 Which of these lets water climb up it? (a) a flower stem (b) a plastic ruler (c) a glass marble (d) a piece of foil
2. 2.True or false: turmeric powder is needed for the coloured flower experiment. (a) True (b) False
3. 3.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? True or false: the amount of colour is the one thing we change. (a) False (b) True
4. 4.🔍 Which is the odd one out? (a) a strip of cloth (b) a cotton thread (c) a flower stem (d) a rubber eraser
5. 5.True or false: food colour is needed for the coloured flower experiment. (a) True (b) False
6. 6.True or false: turmeric powder is not needed for the coloured flower experiment. (a) True (b) False
7. 7.⚖️ 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 change it (b) we keep it the same (c) we measure it
8. 8.True or false: a sugar cube lets water climb up it. (a) False (b) True
9. 9.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a white flower (b) a glass of water (c) food colour (d) a mirror
10. 10.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a few hours of waiting (b) a glass of water (c) a battery cell (d) a white flower
11. 11.True or false: a strip of cloth does not let water climb. (a) False (b) True
12. 12.🔮 Predict: a stem is split in two, one half in red water and one in blue. What do the petals do? (a) they stay white (b) they all turn green (c) they fall off at once (d) they turn two colours
13. 13.🔮 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
14. 14.🧺 Which of these is needed for the coloured flower experiment? (a) yeast (b) a mirror (c) turmeric powder (d) food colour
15. 15.True or false: food colour is not needed for the coloured flower experiment. (a) True (b) False
16. 16.💧 Which of these lets water climb up it? (a) a glass marble (b) a rubber eraser (c) a cotton thread (d) a plastic ruler
17. 17.⚖️ 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 change it (b) we measure it (c) we keep it the same
18. 18.True or false: a white flower is needed for the coloured flower experiment. (a) False (b) True
19. 19.🔍 Which is the odd one out? (a) a cotton thread (b) a plastic ruler (c) a glass marble (d) a rubber eraser
20. 20.🔍 Which is the odd one out? (a) a plastic ruler (b) a paper towel (c) a glass marble (d) a piece of foil
21. 21.🧺 Do we need a mirror for the coloured flower experiment? (a) not needed (b) needed
22. 22.⚖️ 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) time for colour to show (c) the length of the stem (d) the amount of colour
23. 23.⚖️ 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 change it (b) we measure it (c) we keep it the same
24. 24.⚖️ 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 room it stands in (c) time for colour to show
25. 25.📘 What is it called when water climbs up thin tubes or paper by itself? (a) magnetism (b) evaporation (c) melting (d) capillary action
26. 26.🧺 Do we need a glass of water for the coloured flower experiment? (a) needed (b) not needed
27. 27.💧 Which of these does not let water climb? (a) a steel spoon (b) a paper towel (c) a strip of cloth (d) a flower stem
28. 28.🔮 Predict: a strip of paper towel dips into coloured water. What happens? (a) colour climbs up it (b) it sinks at once (c) nothing ever happens (d) it turns to plastic
29. 29.🛟 Who should trim the flower stem? (a) anyone, without looking (b) a toddler (c) a pet (d) a grown-up
30. 30.⚖️ 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
31. 31.⚖️ 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
32. 32.True or false: a rubber eraser does not let water climb. (a) False (b) True
33. 33.💧 Dip a flower stem into coloured water. Does the water climb up it? (a) water climbs up it (b) water does not climb
34. 34.🧺 Which of these is needed for the coloured flower experiment? (a) a balloon (b) a battery cell (c) a few hours of waiting (d) turmeric powder
35. 35.🛟 What should you do after handling food colour? (a) rub your eyes (b) lick your fingers (c) wash your hands (d) wipe them on walls
36. 36.🧺 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) yeast (d) a few hours of waiting
37. 37.⚖️ 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 keep it the same (b) we change it (c) we measure it
38. 38.🌼 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
39. 39.⚖️ 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 kind of flower (b) time for colour to show (c) the length of the stem
40. 40.⚖️ 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

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