Capillary Action Flower Experiment Worksheet

Science experiments lesson 4: Colour-changing flower: capillary action · Set 403 · 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.True or false: a steel spoon lets water climb up it. (a) True (b) False
2. 2.🛟 What should you do after handling food colour? (a) wipe them on walls (b) rub your eyes (c) wash your hands (d) lick your fingers
3. 3.🧺 Do we need turmeric powder for the coloured flower experiment? (a) needed (b) not needed
4. 4.True or false: food colour is needed for the coloured flower experiment. (a) True (b) False
5. 5.💧 Dip a piece of foil into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
6. 6.💧 Dip a rubber eraser into coloured water. Does the water climb up it? (a) water climbs up it (b) water does not climb
7. 7.🧺 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
8. 8.🧺 Which of these is needed for the coloured flower experiment? (a) a white flower (b) a magnet (c) yeast (d) a mirror
9. 9.⚖️ 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) False (b) True
10. 10.🧺 Do we need a balloon for the coloured flower experiment? (a) needed (b) not needed
11. 11.💧 Which of these lets water climb up it? (a) a piece of foil (b) a plastic ruler (c) a cotton thread (d) a rubber eraser
12. 12.📘 What is it called when water climbs up thin tubes or paper by itself? (a) capillary action (b) melting (c) magnetism (d) evaporation
13. 13.⚖️ 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 amount of water (c) the amount of colour (d) the length of the stem
14. 14.True or false: a glass of water is not needed for the coloured flower experiment. (a) True (b) False
15. 15.⚖️ 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 length of the stem (c) the amount of water
16. 16.True or false: yeast is needed for the coloured flower experiment. (a) True (b) False
17. 17.True or false: a sugar cube does not let water climb. (a) True (b) False
18. 18.🛟 Who should trim the flower stem? (a) anyone, without looking (b) a toddler (c) a grown-up (d) a pet
19. 19.True or false: a mirror is not needed for the coloured flower experiment. (a) False (b) True
20. 20.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? True or false: the length of the stem is what we measure. (a) False (b) True
21. 21.🧺 Do we need a white flower for the coloured flower experiment? (a) not needed (b) needed
22. 22.💧 Dip a piece of chalk into coloured water. Does the water climb up it? (a) water climbs up it (b) water does not climb
23. 23.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) food colour (b) a white flower (c) a few hours of waiting (d) a mirror
24. 24.🧺 Do we need a few hours of waiting for the coloured flower experiment? (a) needed (b) not needed
25. 25.True or false: a paper towel does not let water climb. (a) False (b) True
26. 26.True or false: a magnet is needed for the coloured flower experiment. (a) True (b) False
27. 27.True or false: a cotton thread does not let water climb. (a) False (b) True
28. 28.💧 Dip a cotton thread into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
29. 29.⚖️ 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 length of the stem (c) the amount of colour
30. 30.🌼 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
31. 31.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) food colour (b) a balloon (c) a few hours of waiting (d) a glass of water
32. 32.💧 Which of these does not let water climb? (a) a glass marble (b) a paper towel (c) a flower stem (d) a sugar cube
33. 33.⚖️ 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
34. 34.True or false: a rubber eraser lets water climb up it. (a) True (b) False
35. 35.True or false: a cotton thread lets water climb up it. (a) False (b) True
36. 36.💧 Dip a strip of cloth into coloured water. Does the water climb up it? (a) water climbs up it (b) water does not climb
37. 37.🧺 Do we need yeast for the coloured flower experiment? (a) not needed (b) needed
38. 38.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a glass of water (b) a few hours of waiting (c) a battery cell (d) a white flower
39. 39.True or false: a battery cell is not needed for the coloured flower experiment. (a) False (b) True
40. 40.🔮 What would change if the flower stood in plain water? (a) the stem turns blue (b) no colour change (c) the flower glows (d) the petals turn red

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