Capillary Action Flower Experiment Worksheet

Science experiments lesson 4: Colour-changing flower: capillary action · Set 182 · 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 strip of paper towel dips into coloured water. What happens? (a) nothing ever happens (b) it sinks at once (c) it turns to plastic (d) colour climbs up it
2. 2.True or false: a cotton thread does not let water climb. (a) False (b) True
3. 3.⚖️ 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 length of the stem (b) time for colour to show (c) the room it stands in (d) the amount of water
4. 4.True or false: a few hours of waiting is needed for the coloured flower experiment. (a) True (b) False
5. 5.True or false: a rubber eraser does not let water climb. (a) True (b) False
6. 6.🧺 Do we need turmeric powder for the coloured flower experiment? (a) not needed (b) needed
7. 7.🔍 Which is the odd one out? (a) a piece of chalk (b) a plastic ruler (c) a glass marble (d) a piece of foil
8. 8.🔮 Predict: a stem is split in two, one half in red water and one in blue. What do the petals do? (a) they stay white (b) they all turn green (c) they fall off at once (d) they turn two colours
9. 9.🛟 What should you do after handling food colour? (a) wash your hands (b) lick your fingers (c) rub your eyes (d) wipe them on walls
10. 10.🌼 Why do the petals keep pulling water up the stem? (a) petals like colour (b) the stem is hot (c) petals are magnetic (d) petals lose water to air
11. 11.True or false: a balloon is needed for the coloured flower experiment. (a) True (b) False
12. 12.🧺 Which of these is needed for the coloured flower experiment? (a) yeast (b) food colour (c) a battery cell (d) a mirror
13. 13.🔍 What do you see a day after a white flower stands in blue water? (a) the water turns green (b) the petals turn bluish (c) the stem turns to ice (d) the flower floats away
14. 14.💧 Dip a paper towel into coloured water. Does the water climb up it? (a) water climbs up it (b) water does not climb
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.⚖️ 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) time for colour to show (b) the amount of water (c) the room it stands in (d) the length of the stem
17. 17.True or false: a cotton thread lets water climb up it. (a) True (b) False
18. 18.💧 Dip a strip of cloth into coloured water. Does the water climb up it? (a) water climbs up it (b) water does not climb
19. 19.🛟 Who should trim the flower stem? (a) a grown-up (b) a toddler (c) a pet (d) anyone, without looking
20. 20.⚖️ 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
21. 21.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a glass of water (b) a white flower (c) a magnet (d) a few hours of waiting
22. 22.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a balloon (b) food colour (c) a few hours of waiting (d) a white flower
23. 23.🔍 Which is the odd one out? (a) a plastic ruler (b) a steel spoon (c) a cotton thread (d) a glass marble
24. 24.🧺 Which of these is not needed for the coloured flower experiment? (a) a glass of water (b) a battery cell (c) a few hours of waiting (d) food colour
25. 25.💧 Which of these does not let water climb? (a) a cotton thread (b) a flower stem (c) a piece of chalk (d) a piece of foil
26. 26.True or false: a glass marble does not let water climb. (a) True (b) False
27. 27.🧺 Which of these is not needed for the coloured flower experiment? (a) a white flower (b) turmeric powder (c) a few hours of waiting (d) a glass of water
28. 28.📘 What is it called when water climbs up thin tubes or paper by itself? (a) magnetism (b) melting (c) capillary action (d) evaporation
29. 29.True or false: a magnet is not needed for the coloured flower experiment. (a) False (b) True
30. 30.💧 Dip a flower stem into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
31. 31.💧 Which of these lets water climb up it? (a) a piece of foil (b) a steel spoon (c) a flower stem (d) a glass marble
32. 32.True or false: a glass of water is not needed for the coloured flower experiment. (a) False (b) True
33. 33.💧 Which of these lets water climb up it? (a) a glass marble (b) a steel spoon (c) a cotton thread (d) a rubber eraser
34. 34.🧺 Do we need a white flower for the coloured flower experiment? (a) not needed (b) needed
35. 35.💧 Which of these does not let water climb? (a) a cotton thread (b) a sugar cube (c) a piece of chalk (d) a plastic ruler
36. 36.🧺 Do we need a glass of water for the coloured flower experiment? (a) not needed (b) needed
37. 37.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a white flower (b) food colour (c) yeast (d) a glass of water
38. 38.🔍 Which is the odd one out? (a) a piece of chalk (b) a glass marble (c) a cotton thread (d) a sugar cube
39. 39.🧺 Which of these is needed for the coloured flower experiment? (a) a few hours of waiting (b) a mirror (c) a magnet (d) a battery cell
40. 40.🔮 What would change if the flower stood in plain water? (a) no colour change (b) the petals turn red (c) the flower glows (d) the stem turns blue

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