Capillary Action Flower Experiment Worksheet

Science experiments lesson 4: Colour-changing flower: capillary action · Set 804 · 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.🧺 Do we need yeast for the coloured flower experiment? (a) needed (b) not needed
2. 2.🔮 Predict: a strip of paper towel dips into coloured water. What happens? (a) nothing ever happens (b) colour climbs up it (c) it sinks at once (d) it turns to plastic
3. 3.⚖️ 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
4. 4.💧 Dip a sugar cube into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
5. 5.🌼 Why do the petals keep pulling water up the stem? (a) petals like colour (b) the stem is hot (c) petals lose water to air (d) petals are magnetic
6. 6.⚖️ 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 length of the stem (c) time for colour to show (d) the room it stands in
7. 7.🔍 What do you see a day after a white flower stands in blue water? (a) the stem turns to ice (b) the water turns green (c) the petals turn bluish (d) the flower floats away
8. 8.📘 What is it called when water climbs up thin tubes or paper by itself? (a) melting (b) capillary action (c) evaporation (d) magnetism
9. 9.True or false: food colour is not needed for the coloured flower experiment. (a) True (b) False
10. 10.True or false: a sugar cube lets water climb up it. (a) True (b) False
11. 11.🛟 Who should trim the flower stem? (a) a pet (b) a toddler (c) a grown-up (d) anyone, without looking
12. 12.True or false: a balloon is not needed for the coloured flower experiment. (a) True (b) False
13. 13.⚖️ 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 room it stands in (b) the amount of water (c) time for colour to show (d) the length of the stem
14. 14.True or false: a mirror is needed for the coloured flower experiment. (a) True (b) False
15. 15.True or false: a sugar cube does not let water climb. (a) False (b) True
16. 16.True or false: a white flower is not needed for the coloured flower experiment. (a) False (b) True
17. 17.True or false: a steel spoon lets water climb up it. (a) True (b) False
18. 18.🌼 How does coloured water reach the petals? (a) through tiny stem tubes (b) it rains on them (c) it is sprayed on (d) through the air
19. 19.🧺 Do we need a white flower for the coloured flower experiment? (a) needed (b) not needed
20. 20.⚖️ 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 keep it the same (b) we measure it (c) we change it
21. 21.🔮 What would change if the flower stood in plain water? (a) the flower glows (b) the petals turn red (c) no colour change (d) the stem turns blue
22. 22.🔍 Which is the odd one out? (a) a cotton thread (b) a plastic ruler (c) a glass marble (d) a steel spoon
23. 23.💧 Which of these lets water climb up it? (a) a steel spoon (b) a rubber eraser (c) a cotton thread (d) a glass marble
24. 24.💧 Dip a piece of chalk into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
25. 25.🔍 Which is the odd one out? (a) a flower stem (b) a steel spoon (c) a strip of cloth (d) a cotton thread
26. 26.💧 Which of these lets water climb up it? (a) a rubber eraser (b) a piece of foil (c) a glass marble (d) a paper towel
27. 27.True or false: a paper towel does not let water climb. (a) True (b) False
28. 28.True or false: turmeric powder is not needed for the coloured flower experiment. (a) False (b) True
29. 29.💧 Dip a cotton thread into coloured water. Does the water climb up it? (a) water climbs up it (b) water does not climb
30. 30.True or false: yeast is not needed for the coloured flower experiment. (a) True (b) False
31. 31.⚖️ 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
32. 32.💧 Which of these does not let water climb? (a) a flower stem (b) a sugar cube (c) a strip of cloth (d) a glass marble
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.True or false: a balloon is needed for the coloured flower experiment. (a) True (b) False
35. 35.🧺 Which of these is needed for the coloured flower experiment? (a) a battery cell (b) yeast (c) a glass of water (d) a balloon
36. 36.True or false: a rubber eraser lets water climb up it. (a) True (b) False
37. 37.🔍 Which is the odd one out? (a) a glass marble (b) a paper towel (c) a cotton thread (d) a strip of cloth
38. 38.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a glass of water (b) turmeric powder (c) a few hours of waiting (d) a white flower
39. 39.🧺 Which of these is not needed for the coloured flower experiment? (a) a white flower (b) a few hours of waiting (c) a magnet (d) food colour
40. 40.🛟 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

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