Capillary Action Flower Experiment Worksheet

Science experiments lesson 4: Colour-changing flower: capillary action · Set 600 · 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.🌼 How does coloured water reach the petals? (a) it is sprayed on (b) through tiny stem tubes (c) it rains on them (d) through the air
2. 2.🧺 Do we need a mirror for the coloured flower experiment? (a) needed (b) not needed
3. 3.📘 What is it called when water climbs up thin tubes or paper by itself? (a) evaporation (b) magnetism (c) melting (d) capillary action
4. 4.⚖️ 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 length of the stem (b) the amount of colour (c) the amount of water (d) time for colour to show
5. 5.⚖️ 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
6. 6.True or false: a cotton thread lets water climb up it. (a) True (b) False
7. 7.🔮 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 fall off at once (d) they stay white
8. 8.🧺 Which of these is not needed for the coloured flower experiment? (a) a few hours of waiting (b) food colour (c) a glass of water (d) a balloon
9. 9.🧺 Do we need a magnet for the coloured flower experiment? (a) needed (b) not needed
10. 10.🧺 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) turmeric powder
11. 11.🧺 Do we need a glass of water for the coloured flower experiment? (a) not needed (b) needed
12. 12.🧺 Do we need a white flower for the coloured flower experiment? (a) needed (b) not needed
13. 13.🌼 Why do the petals keep pulling water up the stem? (a) petals are magnetic (b) the stem is hot (c) petals like colour (d) petals lose water to air
14. 14.True or false: a magnet is not needed for the coloured flower experiment. (a) True (b) False
15. 15.🧺 Which of these is not needed for the coloured flower experiment? (a) a white flower (b) food colour (c) a few hours of waiting (d) a battery cell
16. 16.⚖️ 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
17. 17.💧 Which of these does not let water climb? (a) a paper towel (b) a piece of chalk (c) a plastic ruler (d) a cotton thread
18. 18.⚖️ 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 room it stands in
19. 19.🧺 Which of these is not needed for the coloured flower experiment? (a) a white flower (b) yeast (c) a few hours of waiting (d) a glass of water
20. 20.🧺 Which of these is needed for the coloured flower experiment? (a) a few hours of waiting (b) a mirror (c) yeast (d) a battery cell
21. 21.⚖️ 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 amount of colour (c) time for colour to show (d) the room it stands in
22. 22.🔍 Which is the odd one out? (a) a glass marble (b) a piece of foil (c) a paper towel (d) a steel spoon
23. 23.🔍 Which is the odd one out? (a) a cotton thread (b) a paper towel (c) a piece of chalk (d) a rubber eraser
24. 24.🧺 Do we need a few hours of waiting for the coloured flower experiment? (a) needed (b) not needed
25. 25.🛟 What should you do after handling food colour? (a) rub your eyes (b) lick your fingers (c) wipe them on walls (d) wash your hands
26. 26.True or false: a flower stem lets water climb up it. (a) True (b) False
27. 27.⚖️ 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 what we measure. (a) True (b) False
28. 28.⚖️ 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
29. 29.🔍 Which is the odd one out? (a) a plastic ruler (b) a cotton thread (c) a glass marble (d) a steel spoon
30. 30.🛟 Who should trim the flower stem? (a) anyone, without looking (b) a toddler (c) a pet (d) a grown-up
31. 31.True or false: a rubber eraser lets water climb up it. (a) True (b) False
32. 32.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) food colour (b) a few hours of waiting (c) a white flower (d) a balloon
33. 33.🔮 What would change if the flower stood in plain water? (a) the flower glows (b) the petals turn red (c) the stem turns blue (d) no colour change
34. 34.True or false: a magnet is needed for the coloured flower experiment. (a) True (b) False
35. 35.💧 Which of these lets water climb up it? (a) a piece of foil (b) a plastic ruler (c) a rubber eraser (d) a cotton thread
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 measure it (c) we change it
37. 37.True or false: turmeric powder is not needed for the coloured flower experiment. (a) False (b) True
38. 38.🧺 Which of these is needed for the coloured flower experiment? (a) turmeric powder (b) yeast (c) a magnet (d) a glass of water
39. 39.🔍 Which is the odd one out? (a) a glass marble (b) a plastic ruler (c) a strip of cloth (d) a steel spoon
40. 40.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) food colour (b) a battery cell (c) a glass of water (d) a few hours of waiting

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