Capillary Action Flower Experiment Worksheet

Science experiments lesson 4: Colour-changing flower: capillary action · Set 15 · 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.🧺 Do we need a magnet for the coloured flower experiment? (a) not needed (b) needed
2. 2.True or false: a steel spoon does not let water climb. (a) True (b) False
3. 3.⚖️ 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) True (b) False
4. 4.🔍 What do you see a day after a white flower stands in blue water? (a) the flower floats away (b) the petals turn bluish (c) the stem turns to ice (d) the water turns green
5. 5.🧺 Do we need food colour for the coloured flower experiment? (a) not needed (b) needed
6. 6.⚖️ 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
7. 7.🌼 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
8. 8.🔮 Predict: a strip of paper towel dips into coloured water. What happens? (a) nothing ever happens (b) it sinks at once (c) colour climbs up it (d) it turns to plastic
9. 9.True or false: a piece of foil does not let water climb. (a) False (b) True
10. 10.🧺 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) a few hours of waiting (d) turmeric powder
11. 11.🧺 Do we need a white flower for the coloured flower experiment? (a) not needed (b) needed
12. 12.⚖️ 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
13. 13.🔍 Which is the odd one out? (a) a sugar cube (b) a cotton thread (c) a paper towel (d) a rubber eraser
14. 14.💧 Which of these does not let water climb? (a) a paper towel (b) a steel spoon (c) a piece of chalk (d) a cotton thread
15. 15.🧺 Do we need yeast for the coloured flower experiment? (a) not needed (b) needed
16. 16.True or false: a white flower is not needed for the coloured flower experiment. (a) True (b) False
17. 17.True or false: a battery cell is not needed for the coloured flower experiment. (a) True (b) False
18. 18.🔮 Predict: a stem is split in two, one half in red water and one in blue. What do the petals do? (a) they fall off at once (b) they stay white (c) they turn two colours (d) they all turn green
19. 19.⚖️ 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 room it stands in (b) the kind of flower (c) the length of the stem (d) the amount of water
20. 20.True or false: a paper towel does not let water climb. (a) True (b) False
21. 21.🧺 Which of these is not needed for the coloured flower experiment? (a) a balloon (b) a glass of water (c) food colour (d) a white flower
22. 22.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? True or false: the amount of water is what we measure. (a) True (b) False
23. 23.⚖️ 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
24. 24.🧺 Do we need a few hours of waiting for the coloured flower experiment? (a) not needed (b) needed
25. 25.True or false: food colour is not needed for the coloured flower experiment. (a) False (b) True
26. 26.🧺 Which of these is needed for the coloured flower experiment? (a) turmeric powder (b) a battery cell (c) a magnet (d) food colour
27. 27.⚖️ 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
28. 28.🧺 Which of these is needed for the coloured flower experiment? (a) a magnet (b) a mirror (c) a white flower (d) yeast
29. 29.True or false: a rubber eraser does not let water climb. (a) False (b) True
30. 30.🧺 Which of these is not needed for the coloured flower experiment? (a) a glass of water (b) food colour (c) a white flower (d) a battery cell
31. 31.True or false: a sugar cube lets water climb up it. (a) False (b) True
32. 32.💧 Dip a rubber eraser into coloured water. Does the water climb up it? (a) water climbs up it (b) water does not climb
33. 33.🔍 Which is the odd one out? (a) a strip of cloth (b) a glass marble (c) a piece of foil (d) a plastic ruler
34. 34.🧺 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) a magnet (d) a few hours of waiting
35. 35.🔍 Which is the odd one out? (a) a cotton thread (b) a plastic ruler (c) a sugar cube (d) a strip of cloth
36. 36.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? What do we do with “the kind of flower”? (a) we measure it (b) we keep it the same (c) we change it
37. 37.⚖️ 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 the one thing we change. (a) True (b) False
38. 38.💧 Dip a piece of foil into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
39. 39.⚖️ 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 kind of flower (b) time for colour to show (c) the length of the stem (d) the amount of water
40. 40.💧 Which of these does not let water climb? (a) a strip of cloth (b) a plastic ruler (c) a flower stem (d) a cotton thread

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