Capillary Action Flower Experiment Worksheet

Science experiments lesson 4: Colour-changing flower: capillary action · Set 309 · 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.🔍 What do you see a day after a white flower stands in blue water? (a) the water turns green (b) the petals turn bluish (c) the flower floats away (d) the stem turns to ice
2. 2.⚖️ 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
3. 3.🔍 Which is the odd one out? (a) a glass marble (b) a piece of chalk (c) a paper towel (d) a sugar cube
4. 4.🧺 Do we need yeast for the coloured flower experiment? (a) needed (b) not needed
5. 5.🛟 Who should trim the flower stem? (a) a toddler (b) a pet (c) a grown-up (d) anyone, without looking
6. 6.🔮 Predict: a strip of paper towel dips into coloured water. What happens? (a) it turns to plastic (b) it sinks at once (c) colour climbs up it (d) nothing ever happens
7. 7.True or false: a magnet is needed for the coloured flower experiment. (a) True (b) False
8. 8.🧺 Do we need a few hours of waiting for the coloured flower experiment? (a) not needed (b) needed
9. 9.💧 Dip a plastic ruler into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
10. 10.🔍 Which is the odd one out? (a) a strip of cloth (b) a cotton thread (c) a flower stem (d) a steel spoon
11. 11.🧺 Which of these is needed for the coloured flower experiment? (a) food colour (b) a magnet (c) a balloon (d) a mirror
12. 12.💧 Dip a flower stem into coloured water. Does the water climb up it? (a) water climbs up it (b) water does not climb
13. 13.🧺 Do we need a glass of water for the coloured flower experiment? (a) needed (b) not needed
14. 14.🧺 Do we need a magnet for the coloured flower experiment? (a) needed (b) not needed
15. 15.📘 What is it called when water climbs up thin tubes or paper by itself? (a) evaporation (b) magnetism (c) melting (d) capillary action
16. 16.True or false: a white flower is not needed for the coloured flower experiment. (a) True (b) False
17. 17.⚖️ 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 length of the stem (c) time for colour to show (d) the amount of water
18. 18.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? True or false: the amount of water is the one thing we change. (a) True (b) False
19. 19.True or false: a glass marble lets water climb up it. (a) True (b) False
20. 20.💧 Which of these lets water climb up it? (a) a plastic ruler (b) a rubber eraser (c) a glass marble (d) a cotton thread
21. 21.🧺 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 white flower (d) turmeric powder
22. 22.True or false: a paper towel does not let water climb. (a) True (b) False
23. 23.True or false: a balloon is needed for the coloured flower experiment. (a) False (b) True
24. 24.🔮 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 turn two colours (c) they stay white (d) they fall off at once
25. 25.🌼 Why do the petals keep pulling water up the stem? (a) petals lose water to air (b) petals like colour (c) petals are magnetic (d) the stem is hot
26. 26.🧺 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) food colour (d) a mirror
27. 27.💧 Dip a cotton thread into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
28. 28.🔍 Which is the odd one out? (a) a sugar cube (b) a strip of cloth (c) a piece of foil (d) a piece of chalk
29. 29.🧺 Do we need a mirror for the coloured flower experiment? (a) not needed (b) needed
30. 30.🧺 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
31. 31.🧺 Do we need food colour for the coloured flower experiment? (a) not needed (b) needed
32. 32.⚖️ 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 measure it (b) we keep it the same (c) we change it
33. 33.💧 Which of these lets water climb up it? (a) a steel spoon (b) a flower stem (c) a rubber eraser (d) a piece of foil
34. 34.True or false: a battery cell is needed for the coloured flower experiment. (a) True (b) False
35. 35.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a white flower (b) food colour (c) a magnet (d) a glass of water
36. 36.⚖️ 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 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 kind of flower is the one thing we change. (a) False (b) True
38. 38.🌼 How does coloured water reach the petals? (a) through tiny stem tubes (b) it rains on them (c) through the air (d) it is sprayed on
39. 39.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a few hours of waiting (b) yeast (c) a white flower (d) food colour
40. 40.True or false: food colour is not needed for the coloured flower experiment. (a) True (b) False

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