Capillary Action Flower Experiment Worksheet

Science experiments lesson 4: Colour-changing flower: capillary action · Set 325 · 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.📘 What is it called when water climbs up thin tubes or paper by itself? (a) magnetism (b) melting (c) capillary action (d) evaporation
2. 2.True or false: a few hours of waiting is needed for the coloured flower experiment. (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) the amount of water (c) the amount of colour (d) time for colour to show
4. 4.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a few hours of waiting (b) a magnet (c) a white flower (d) a glass of water
5. 5.True or false: a battery cell is needed for the coloured flower experiment. (a) False (b) True
6. 6.💧 Dip a piece of chalk into coloured water. Does the water climb up it? (a) water climbs up it (b) water does not climb
7. 7.🛟 Who should trim the flower stem? (a) anyone, without looking (b) a pet (c) a toddler (d) a grown-up
8. 8.True or false: a glass marble does not let water climb. (a) False (b) True
9. 9.⚖️ 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
10. 10.True or false: food colour is not needed for the coloured flower experiment. (a) False (b) True
11. 11.🔮 What would change if the flower stood in plain water? (a) the flower glows (b) the stem turns blue (c) the petals turn red (d) no colour change
12. 12.🔍 Which is the odd one out? (a) a steel spoon (b) a plastic ruler (c) a strip of cloth (d) a piece of foil
13. 13.🧺 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) yeast
14. 14.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? True or false: the amount of colour is kept the same. (a) False (b) True
15. 15.💧 Dip a paper towel into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
16. 16.🛟 What should you do after handling food colour? (a) lick your fingers (b) rub your eyes (c) wash your hands (d) wipe them on walls
17. 17.⚖️ 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 kind of flower (c) the amount of water (d) the amount of colour
18. 18.🔍 Which is the odd one out? (a) a flower stem (b) a paper towel (c) a piece of foil (d) a piece of chalk
19. 19.🧺 Which of these is needed for the coloured flower experiment? (a) yeast (b) a magnet (c) a glass of water (d) a mirror
20. 20.🧺 Do we need food colour for the coloured flower experiment? (a) needed (b) not needed
21. 21.True or false: a steel spoon does not let water climb. (a) False (b) True
22. 22.🧺 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 balloon (d) a white flower
23. 23.🔮 Predict: a stem is split in two, one half in red water and one in blue. What do the petals do? (a) they turn two colours (b) they fall off at once (c) they stay white (d) they all turn green
24. 24.💧 Which of these lets water climb up it? (a) a glass marble (b) a steel spoon (c) a sugar cube (d) a rubber eraser
25. 25.🧺 Which of these is not needed for the coloured flower experiment? (a) a glass of water (b) food colour (c) a few hours of waiting (d) a battery cell
26. 26.💧 Dip a glass marble into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
27. 27.🧺 Which of these is needed for the coloured flower experiment? (a) a mirror (b) yeast (c) a battery cell (d) a white flower
28. 28.True or false: a strip of cloth lets water climb up it. (a) True (b) False
29. 29.💧 Which of these does not let water climb? (a) a piece of chalk (b) a cotton thread (c) a flower stem (d) a glass marble
30. 30.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? Which of these is kept the same? (a) the length of the stem (b) the kind of flower (c) time for colour to show
31. 31.🌼 How does coloured water reach the petals? (a) through the air (b) it rains on them (c) through tiny stem tubes (d) it is sprayed on
32. 32.True or false: a few hours of waiting is not needed for the coloured flower experiment. (a) True (b) False
33. 33.True or false: food colour is needed for the coloured flower experiment. (a) True (b) False
34. 34.🧺 Which of these is needed for the coloured flower experiment? (a) a battery cell (b) a magnet (c) food colour (d) a balloon
35. 35.🧺 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 white flower (d) a battery cell
36. 36.⚖️ 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
37. 37.💧 Dip a rubber eraser into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
38. 38.True or false: a cotton thread does not let water climb. (a) True (b) False
39. 39.🧺 Which of these is not needed for the coloured flower experiment? (a) food colour (b) a white flower (c) turmeric powder (d) a glass of water
40. 40.🔍 What do you see a day after a white flower stands in blue water? (a) the stem turns to ice (b) the flower floats away (c) the petals turn bluish (d) the water turns green

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