Capillary Action Flower Experiment Worksheet

Science experiments lesson 4: Colour-changing flower: capillary action · Set 501 · 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 mirror is needed for the coloured flower experiment. (a) True (b) False
2. 2.🔍 Which is the odd one out? (a) a flower stem (b) a cotton thread (c) a paper towel (d) a plastic ruler
3. 3.🔮 Predict: a stem is split in two, one half in red water and one in blue. What do the petals do? (a) they all turn green (b) they turn two colours (c) they stay white (d) they fall off at once
4. 4.🌼 Why do the petals keep pulling water up the stem? (a) petals are magnetic (b) petals like colour (c) petals lose water to air (d) the stem is hot
5. 5.🛟 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
6. 6.True or false: a rubber eraser does not let water climb. (a) False (b) True
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 amount of water (b) the room it stands in (c) time for colour to show (d) the length of the stem
8. 8.True or false: a steel spoon lets water climb up it. (a) True (b) False
9. 9.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a white flower (b) turmeric powder (c) a glass of water (d) food colour
10. 10.⚖️ 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) True (b) False
11. 11.True or false: a few hours of waiting is not needed for the coloured flower experiment. (a) True (b) False
12. 12.⚖️ 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
13. 13.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a few hours of waiting (b) yeast (c) a glass of water (d) a white flower
14. 14.💧 Which of these lets water climb up it? (a) a glass marble (b) a sugar cube (c) a steel spoon (d) a rubber eraser
15. 15.⚖️ 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) False (b) True
16. 16.🧺 Which of these is not needed for the coloured flower experiment? (a) food colour (b) a few hours of waiting (c) a battery cell (d) a glass of water
17. 17.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a glass of water (b) food colour (c) a balloon (d) a few hours of waiting
18. 18.📘 What is it called when water climbs up thin tubes or paper by itself? (a) evaporation (b) melting (c) capillary action (d) magnetism
19. 19.True or false: a strip of cloth lets water climb up it. (a) False (b) True
20. 20.🧺 Which of these is needed for the coloured flower experiment? (a) a balloon (b) food colour (c) a battery cell (d) yeast
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 colour”? (a) we measure it (b) we change it (c) we keep it the same
22. 22.True or false: a battery cell is not needed for the coloured flower experiment. (a) False (b) True
23. 23.🛟 Who should trim the flower stem? (a) a pet (b) a toddler (c) a grown-up (d) anyone, without looking
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) time for colour to show (c) the kind of flower
25. 25.🔍 Which is the odd one out? (a) a paper towel (b) a piece of foil (c) a glass marble (d) a steel spoon
26. 26.🧺 Which of these is not needed for the coloured flower experiment? (a) food colour (b) a few hours of waiting (c) a white flower (d) a mirror
27. 27.⚖️ 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 length of the stem (c) the amount of colour
28. 28.🔍 What do you see a day after a white flower stands in blue water? (a) the flower floats away (b) the water turns green (c) the petals turn bluish (d) the stem turns to ice
29. 29.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a few hours of waiting (b) food colour (c) a white flower (d) a battery cell
30. 30.💧 Dip a sugar cube into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
31. 31.🔮 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
32. 32.True or false: turmeric powder is needed for the coloured flower experiment. (a) False (b) True
33. 33.⚖️ 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
34. 34.True or false: a flower stem does not let water climb. (a) True (b) False
35. 35.True or false: turmeric powder is not needed for the coloured flower experiment. (a) False (b) True
36. 36.⚖️ 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 change it (c) we measure it
37. 37.True or false: a white flower is needed for the coloured flower experiment. (a) False (b) True
38. 38.💧 Which of these does not let water climb? (a) a glass marble (b) a sugar cube (c) a paper towel (d) a piece of chalk
39. 39.⚖️ 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
40. 40.🧺 Which of these is not needed for the coloured flower experiment? (a) a white flower (b) a magnet (c) a glass of water (d) food colour

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