Capillary Action Flower Experiment Worksheet

Science experiments lesson 4: Colour-changing flower: capillary action · Set 430 · 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) the room it stands in (b) the amount of colour (c) the kind of flower (d) time for colour to show
2. 2.⚖️ 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 amount of colour
3. 3.⚖️ 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
4. 4.True or false: a few hours of waiting is needed for the coloured flower experiment. (a) False (b) True
5. 5.True or false: a glass of water is not needed for the coloured flower experiment. (a) False (b) True
6. 6.🧺 Do we need a white flower for the coloured flower experiment? (a) not needed (b) needed
7. 7.🧺 Which of these is needed for the coloured flower experiment? (a) a magnet (b) yeast (c) turmeric powder (d) a white flower
8. 8.🔮 What would change if the flower stood in plain water? (a) the petals turn red (b) the stem turns blue (c) no colour change (d) the flower glows
9. 9.🧺 Do we need a glass of water for the coloured flower experiment? (a) needed (b) not needed
10. 10.💧 Dip a piece of foil into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
11. 11.True or false: food colour is needed for the coloured flower experiment. (a) True (b) False
12. 12.🔮 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 fall off at once (c) they all turn green (d) they turn two colours
13. 13.🧺 Do we need a magnet for the coloured flower experiment? (a) not needed (b) needed
14. 14.🧺 Which of these is not needed for the coloured flower experiment? (a) turmeric powder (b) a white flower (c) a glass of water (d) a few hours of waiting
15. 15.🧺 Which of these is not needed for the coloured flower experiment? (a) a magnet (b) a glass of water (c) a few hours of waiting (d) food colour
16. 16.🌼 Why do the petals keep pulling water up the stem? (a) the stem is hot (b) petals like colour (c) petals lose water to air (d) petals are magnetic
17. 17.🛟 What should you do after handling food colour? (a) lick your fingers (b) wipe them on walls (c) wash your hands (d) rub your eyes
18. 18.🧺 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 balloon
19. 19.💧 Which of these lets water climb up it? (a) a piece of foil (b) a cotton thread (c) a steel spoon (d) a rubber eraser
20. 20.🧺 Which of these is not needed for the coloured flower experiment? (a) a glass of water (b) a white flower (c) a battery cell (d) a few hours of waiting
21. 21.🧺 Which of these is needed for the coloured flower experiment? (a) a glass of water (b) a mirror (c) a magnet (d) yeast
22. 22.True or false: a rubber eraser does not let water climb. (a) True (b) False
23. 23.🧺 Do we need turmeric powder for the coloured flower experiment? (a) not needed (b) needed
24. 24.💧 Which of these lets water climb up it? (a) a steel spoon (b) a rubber eraser (c) a piece of chalk (d) a piece of foil
25. 25.🧺 Which of these is needed for the coloured flower experiment? (a) a mirror (b) a balloon (c) a battery cell (d) a few hours of waiting
26. 26.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a glass of water (b) a mirror (c) a white flower (d) food colour
27. 27.True or false: yeast is needed for the coloured flower experiment. (a) True (b) False
28. 28.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a battery cell (b) food colour (c) a glass of water (d) a white flower
29. 29.🧺 Which of these is not needed for the coloured flower experiment? (a) a mirror (b) a white flower (c) a few hours of waiting (d) food colour
30. 30.⚖️ 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
31. 31.🌼 How does coloured water reach the petals? (a) through the air (b) through tiny stem tubes (c) it is sprayed on (d) it rains on them
32. 32.⚖️ 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 amount of colour (b) the room it stands in (c) the length of the stem (d) time for colour to show
33. 33.⚖️ 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 kind of flower (b) time for colour to show (c) the length of the stem
34. 34.True or false: a glass of water is needed for the coloured flower experiment. (a) False (b) True
35. 35.🔮 Predict: a strip of paper towel dips into coloured water. What happens? (a) it turns to plastic (b) colour climbs up it (c) nothing ever happens (d) it sinks at once
36. 36.🧺 Which of these is not needed for the coloured flower experiment? (a) a glass of water (b) a balloon (c) a white flower (d) food colour
37. 37.💧 Dip a strip of cloth into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
38. 38.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? What do we do with “time for colour to show”? (a) we change it (b) we measure it (c) we keep it the same
39. 39.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? What do we do with “the room it stands in”? (a) we keep it the same (b) we measure it (c) we change it
40. 40.🔍 Which is the odd one out? (a) a strip of cloth (b) a steel spoon (c) a cotton thread (d) a sugar cube

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