Capillary Action Flower Experiment Worksheet

Science experiments lesson 4: Colour-changing flower: capillary action · Set 221 · 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 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
2. 2.🌼 Why do the petals keep pulling water up the stem? (a) petals lose water to air (b) petals are magnetic (c) the stem is hot (d) petals like colour
3. 3.🧺 Do we need turmeric powder for the coloured flower experiment? (a) needed (b) not needed
4. 4.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? What do we do with “the amount of water”? (a) we change it (b) we measure it (c) we keep it the same
5. 5.⚖️ 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
6. 6.🔮 What would change if the flower stood in plain water? (a) the flower glows (b) no colour change (c) the stem turns blue (d) the petals turn red
7. 7.💧 Dip a rubber eraser into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
8. 8.💧 Which of these does not let water climb? (a) a glass marble (b) a strip of cloth (c) a sugar cube (d) a paper towel
9. 9.💧 Dip a cotton thread into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
10. 10.💧 Dip a sugar cube into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
11. 11.🧺 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 glass of water
12. 12.💧 Dip a plastic ruler into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
13. 13.🌼 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
14. 14.📘 What is it called when water climbs up thin tubes or paper by itself? (a) melting (b) magnetism (c) capillary action (d) evaporation
15. 15.⚖️ 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 keep it the same (c) we measure it
16. 16.True or false: a mirror is not needed for the coloured flower experiment. (a) False (b) True
17. 17.🧺 Do we need food colour for the coloured flower experiment? (a) not needed (b) needed
18. 18.🔮 Predict: a strip of paper towel dips into coloured water. What happens? (a) colour climbs up it (b) it turns to plastic (c) it sinks at once (d) nothing ever happens
19. 19.⚖️ 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 amount of colour (b) time for colour to show (c) the length of the stem
20. 20.True or false: a flower stem lets water climb up it. (a) True (b) False
21. 21.🔍 Which is the odd one out? (a) a rubber eraser (b) a paper towel (c) a glass marble (d) a plastic ruler
22. 22.🔍 Which is the odd one out? (a) a paper towel (b) a rubber eraser (c) a strip of cloth (d) a flower stem
23. 23.💧 Dip a steel spoon into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
24. 24.True or false: a balloon is needed for the coloured flower experiment. (a) False (b) True
25. 25.True or false: a cotton thread does not let water climb. (a) True (b) False
26. 26.🧺 Do we need a few hours of waiting for the coloured flower experiment? (a) needed (b) not needed
27. 27.🔍 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
28. 28.True or false: a rubber eraser does not let water climb. (a) True (b) False
29. 29.💧 Dip a strip of cloth into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
30. 30.🔍 Which is the odd one out? (a) a strip of cloth (b) a plastic ruler (c) a flower stem (d) a cotton thread
31. 31.⚖️ 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 kind of flower (d) the amount of colour
32. 32.💧 Dip a flower stem into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
33. 33.🧺 Do we need a white flower for the coloured flower experiment? (a) needed (b) not needed
34. 34.🧺 Which of these is not needed for the coloured flower experiment? (a) a glass of water (b) a few hours of waiting (c) a balloon (d) food colour
35. 35.🧺 Do we need a balloon for the coloured flower experiment? (a) needed (b) not needed
36. 36.🔮 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 fall off at once (d) they turn two colours
37. 37.🧺 Which of these is not needed for the coloured flower experiment? (a) a glass of water (b) a white flower (c) a magnet (d) a few hours of waiting
38. 38.True or false: yeast is needed for the coloured flower experiment. (a) False (b) True
39. 39.🧺 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) food colour (d) a mirror
40. 40.🔍 Which is the odd one out? (a) a plastic ruler (b) a rubber eraser (c) a piece of foil (d) a sugar cube

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