Capillary Action Flower Experiment Worksheet

Science experiments lesson 4: Colour-changing flower: capillary action · Set 950 · 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.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) food colour (b) a glass of water (c) a few hours of waiting (d) a mirror
2. 2.🔮 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 all turn green (c) they stay white (d) they turn two colours
3. 3.True or false: a mirror is needed for the coloured flower experiment. (a) True (b) False
4. 4.🌼 Why do the petals keep pulling water up the stem? (a) petals are magnetic (b) petals lose water to air (c) petals like colour (d) the stem is hot
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 keep it the same (b) we change it (c) we measure it
6. 6.💧 Dip a plastic ruler into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
7. 7.🧺 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 magnet
8. 8.🔍 What do you see a day after a white flower stands in blue water? (a) the water turns green (b) the stem turns to ice (c) the petals turn bluish (d) the flower floats away
9. 9.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) food colour (b) turmeric powder (c) a few hours of waiting (d) a glass of water
10. 10.💧 Dip a cotton thread into coloured water. Does the water climb up it? (a) water climbs up it (b) water does not climb
11. 11.🛟 Who should trim the flower stem? (a) a grown-up (b) anyone, without looking (c) a pet (d) a toddler
12. 12.⚖️ 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) True (b) False
13. 13.🧺 Which of these is not needed for the coloured flower experiment? (a) yeast (b) a glass of water (c) a white flower (d) a few hours of waiting
14. 14.⚖️ 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 measure it (c) we change it
15. 15.🧺 Do we need a glass of water for the coloured flower experiment? (a) not needed (b) needed
16. 16.🧺 Do we need a balloon for the coloured flower experiment? (a) needed (b) not needed
17. 17.📘 What is it called when water climbs up thin tubes or paper by itself? (a) evaporation (b) capillary action (c) melting (d) magnetism
18. 18.💧 Dip a glass marble into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
19. 19.💧 Dip a piece of chalk into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
20. 20.True or false: a piece of foil lets water climb up it. (a) False (b) True
21. 21.💧 Dip a flower stem into coloured water. Does the water climb up it? (a) water climbs up it (b) water does not climb
22. 22.💧 Which of these does not let water climb? (a) a paper towel (b) a flower stem (c) a glass marble (d) a sugar cube
23. 23.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? True or false: the amount of water is the one thing we change. (a) False (b) True
24. 24.True or false: a rubber eraser lets water climb up it. (a) False (b) True
25. 25.🔮 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
26. 26.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? Which of these is what we measure? (a) time for colour to show (b) the room it stands in (c) the kind of flower (d) the amount of colour
27. 27.🧺 Do we need a battery cell for the coloured flower experiment? (a) not needed (b) needed
28. 28.🛟 What should you do after handling food colour? (a) lick your fingers (b) wipe them on walls (c) rub your eyes (d) wash your hands
29. 29.🔮 Predict: a strip of paper towel dips into coloured water. What happens? (a) colour climbs up it (b) nothing ever happens (c) it sinks at once (d) it turns to plastic
30. 30.🔍 Which is the odd one out? (a) a piece of foil (b) a steel spoon (c) a sugar cube (d) a glass marble
31. 31.True or false: a sugar cube does not let water climb. (a) True (b) False
32. 32.🧺 Which of these is needed for the coloured flower experiment? (a) turmeric powder (b) a battery cell (c) a magnet (d) a white flower
33. 33.True or false: a steel spoon does not let water climb. (a) True (b) False
34. 34.💧 Which of these does not let water climb? (a) a strip of cloth (b) a flower stem (c) a paper towel (d) a plastic ruler
35. 35.⚖️ 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 amount of water (c) the length of the stem
36. 36.🔍 Which is the odd one out? (a) a sugar cube (b) a strip of cloth (c) a cotton thread (d) a steel spoon
37. 37.True or false: a piece of foil does not let water climb. (a) True (b) False
38. 38.True or false: a white flower is needed for the coloured flower experiment. (a) True (b) False
39. 39.True or false: a strip of cloth lets water climb up it. (a) True (b) False
40. 40.🧺 Which of these is needed for the coloured flower experiment? (a) a balloon (b) a magnet (c) food colour (d) a battery cell

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