Capillary Action Flower Experiment Worksheet

Science experiments lesson 4: Colour-changing flower: capillary action · Set 820 · 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.🔮 Predict: a stem is split in two, one half in red water and one in blue. What do the petals do? (a) they fall off at once (b) they stay white (c) they all turn green (d) they turn two colours
2. 2.🧺 Do we need a glass of water for the coloured flower experiment? (a) not needed (b) needed
3. 3.🌼 How does coloured water reach the petals? (a) through the air (b) through tiny stem tubes (c) it is sprayed on (d) it rains on them
4. 4.🧺 Do we need yeast for the coloured flower experiment? (a) not needed (b) needed
5. 5.🔍 What do you see a day after a white flower stands in blue water? (a) the petals turn bluish (b) the water turns green (c) the flower floats away (d) the stem turns to ice
6. 6.🛟 Who should trim the flower stem? (a) a grown-up (b) a toddler (c) anyone, without looking (d) a pet
7. 7.True or false: yeast is needed for the coloured flower experiment. (a) False (b) True
8. 8.⚖️ 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 kind of flower (b) the length of the stem (c) the amount of water (d) time for colour to show
9. 9.⚖️ 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 change it (b) we keep it the same (c) we measure it
10. 10.🔍 Which is the odd one out? (a) a piece of chalk (b) a cotton thread (c) a plastic ruler (d) a paper towel
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) False (b) True
12. 12.💧 Which of these lets water climb up it? (a) a plastic ruler (b) a steel spoon (c) a flower stem (d) a glass marble
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.🔍 Which is the odd one out? (a) a paper towel (b) a steel spoon (c) a sugar cube (d) a cotton thread
15. 15.⚖️ 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 measure it (c) we keep it the same
16. 16.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a white flower (b) a mirror (c) food colour (d) a few hours of waiting
17. 17.💧 Dip a sugar cube into coloured water. Does the water climb up it? (a) water climbs up it (b) water does not climb
18. 18.True or false: a battery cell is not needed for the coloured flower experiment. (a) True (b) False
19. 19.💧 Which of these does not let water climb? (a) a strip of cloth (b) a plastic ruler (c) a paper towel (d) a piece of chalk
20. 20.True or false: a rubber eraser does not let water climb. (a) True (b) False
21. 21.🧺 Do we need turmeric powder for the coloured flower experiment? (a) not needed (b) needed
22. 22.📘 What is it called when water climbs up thin tubes or paper by itself? (a) magnetism (b) capillary action (c) melting (d) evaporation
23. 23.💧 Dip a glass marble into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
24. 24.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a white flower (b) a few hours of waiting (c) a glass of water (d) turmeric powder
25. 25.⚖️ 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 keep it the same (b) we change it (c) we measure it
26. 26.🧺 Do we need a few hours of waiting for the coloured flower experiment? (a) not needed (b) needed
27. 27.🔮 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
28. 28.⚖️ 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 what we measure. (a) False (b) True
29. 29.🛟 What should you do after handling food colour? (a) wash your hands (b) rub your eyes (c) lick your fingers (d) wipe them on walls
30. 30.🌼 Why do the petals keep pulling water up the stem? (a) the stem is hot (b) petals are magnetic (c) petals lose water to air (d) petals like colour
31. 31.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a glass of water (b) yeast (c) a white flower (d) a few hours of waiting
32. 32.💧 Which of these lets water climb up it? (a) a sugar cube (b) a piece of foil (c) a steel spoon (d) a glass marble
33. 33.⚖️ 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
34. 34.True or false: a white flower is not needed for the coloured flower experiment. (a) True (b) False
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 what we measure. (a) True (b) False
36. 36.True or false: a mirror is needed for the coloured flower experiment. (a) False (b) True
37. 37.💧 Dip a strip of cloth into coloured water. Does the water climb up it? (a) water climbs up it (b) water does not climb
38. 38.True or false: a sugar cube lets water climb up it. (a) False (b) True
39. 39.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a few hours of waiting (b) a battery cell (c) a glass of water (d) a white flower
40. 40.True or false: food colour is needed for the coloured flower experiment. (a) False (b) True

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