Capillary Action Flower Experiment Worksheet

Science experiments lesson 4: Colour-changing flower: capillary action · Set 456 · 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.⚖️ 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 length of the stem (c) the room it stands in (d) the kind of flower
2. 2.🔍 Which is the odd one out? (a) a cotton thread (b) a sugar cube (c) a strip of cloth (d) a glass marble
3. 3.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a few hours of waiting (b) turmeric powder (c) a white flower (d) a glass of water
4. 4.💧 Dip a flower stem into coloured water. Does the water climb up it? (a) water climbs up it (b) water does not climb
5. 5.🧺 Which of these is not needed for the coloured flower experiment? (a) a few hours of waiting (b) food colour (c) a battery cell (d) a white flower
6. 6.⚖️ 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 kept the same. (a) False (b) True
7. 7.💧 Which of these does not let water climb? (a) a strip of cloth (b) a flower stem (c) a cotton thread (d) a rubber eraser
8. 8.🔍 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 water turns green (d) the petals turn bluish
9. 9.True or false: food colour is needed for the coloured flower experiment. (a) True (b) False
10. 10.💧 Which of these lets water climb up it? (a) a paper towel (b) a steel spoon (c) a plastic ruler (d) a piece of foil
11. 11.🧺 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
12. 12.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a white flower (b) food colour (c) a balloon (d) a few hours of waiting
13. 13.🛟 Who should trim the flower stem? (a) anyone, without looking (b) a grown-up (c) a pet (d) a toddler
14. 14.True or false: a battery cell is needed for the coloured flower experiment. (a) True (b) False
15. 15.🧺 Which of these is needed for the coloured flower experiment? (a) a few hours of waiting (b) a balloon (c) turmeric powder (d) a battery cell
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) the length of the stem (b) the kind of flower (c) time for colour to show (d) the room it stands in
17. 17.🧺 Do we need a balloon for the coloured flower experiment? (a) needed (b) not needed
18. 18.🛟 What should you do after handling food colour? (a) wipe them on walls (b) wash your hands (c) rub your eyes (d) lick your fingers
19. 19.⚖️ 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 the one thing we change. (a) True (b) False
20. 20.True or false: a piece of foil lets water climb up it. (a) False (b) True
21. 21.💧 Which of these does not let water climb? (a) a cotton thread (b) a sugar cube (c) a glass marble (d) a piece of chalk
22. 22.🧺 Which of these is not needed for the coloured flower experiment? (a) a white flower (b) food colour (c) a mirror (d) a glass of water
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 all turn green (b) they stay white (c) they turn two colours (d) they fall off at once
24. 24.⚖️ 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) time for colour to show (c) the kind of flower
25. 25.⚖️ 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 change it (b) we keep it the same (c) we measure it
26. 26.True or false: a mirror is not needed for the coloured flower experiment. (a) False (b) True
27. 27.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a glass of water (b) yeast (c) a white flower (d) a few hours of waiting
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.🧺 Do we need a glass of water for the coloured flower experiment? (a) not needed (b) needed
30. 30.🌼 Why do the petals keep pulling water up the stem? (a) petals like colour (b) petals are magnetic (c) petals lose water to air (d) the stem is hot
31. 31.🔮 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
32. 32.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? True or false: the amount of water is kept the same. (a) True (b) False
33. 33.🧺 Which of these is needed for the coloured flower experiment? (a) a glass of water (b) a balloon (c) a mirror (d) a battery cell
34. 34.💧 Dip a steel spoon into coloured water. Does the water climb up it? (a) water climbs up it (b) water does not climb
35. 35.🧺 Which of these is needed for the coloured flower experiment? (a) a mirror (b) a balloon (c) a battery cell (d) a white flower
36. 36.True or false: a plastic ruler does not let water climb. (a) True (b) False
37. 37.🌼 How does coloured water reach the petals? (a) it is sprayed on (b) through the air (c) it rains on them (d) through tiny stem tubes
38. 38.True or false: a piece of foil does not let water climb. (a) False (b) True
39. 39.🧺 Which of these is needed for the coloured flower experiment? (a) food colour (b) a magnet (c) a battery cell (d) a balloon
40. 40.True or false: yeast is needed for the coloured flower experiment. (a) False (b) True

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