Capillary Action Flower Experiment Worksheet

Science experiments lesson 4: Colour-changing flower: capillary action · Set 70 · 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? What do we do with “the amount of colour”? (a) we change it (b) we keep it the same (c) we measure it
2. 2.True or false: a few hours of waiting is not needed for the coloured flower experiment. (a) False (b) True
3. 3.🔍 Which is the odd one out? (a) a piece of chalk (b) a cotton thread (c) a plastic ruler (d) a strip of cloth
4. 4.💧 Dip a plastic ruler into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
5. 5.🔮 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 turn two colours (c) they stay white (d) they all turn green
6. 6.True or false: a paper towel does not let water climb. (a) False (b) True
7. 7.True or false: a few hours of waiting is needed for the coloured flower experiment. (a) False (b) True
8. 8.🧺 Do we need a balloon for the coloured flower experiment? (a) needed (b) not needed
9. 9.🧺 Do we need turmeric powder for the coloured flower experiment? (a) needed (b) not needed
10. 10.🛟 Who should trim the flower stem? (a) a pet (b) anyone, without looking (c) a grown-up (d) a toddler
11. 11.🔍 Which is the odd one out? (a) a rubber eraser (b) a glass marble (c) a strip of cloth (d) a plastic ruler
12. 12.⚖️ 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 measure it (b) we keep it the same (c) we change it
13. 13.🔮 Predict: a strip of paper towel dips into coloured water. What happens? (a) nothing ever happens (b) colour climbs up it (c) it sinks at once (d) it turns to plastic
14. 14.💧 Which of these lets water climb up it? (a) a plastic ruler (b) a cotton thread (c) a steel spoon (d) a glass marble
15. 15.🧺 Which of these is needed for the coloured flower experiment? (a) a white flower (b) turmeric powder (c) yeast (d) a magnet
16. 16.🧺 Do we need a magnet for the coloured flower experiment? (a) not needed (b) needed
17. 17.🔮 What would change if the flower stood in plain water? (a) the petals turn red (b) the flower glows (c) no colour change (d) the stem turns blue
18. 18.True or false: a mirror is not needed for the coloured flower experiment. (a) True (b) False
19. 19.🌼 Why do the petals keep pulling water up the stem? (a) petals like colour (b) the stem is hot (c) petals are magnetic (d) petals lose water to air
20. 20.⚖️ 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 measure it (b) we keep it the same (c) we change it
21. 21.🧺 Do we need yeast for the coloured flower experiment? (a) needed (b) not needed
22. 22.🧺 Which of these is needed for the coloured flower experiment? (a) a glass of water (b) a balloon (c) a battery cell (d) a magnet
23. 23.💧 Dip a piece of chalk into coloured water. Does the water climb up it? (a) water climbs up it (b) water does not climb
24. 24.True or false: a paper towel lets water climb up it. (a) True (b) False
25. 25.🧺 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) yeast
26. 26.True or false: a steel spoon lets water climb up it. (a) False (b) True
27. 27.🧺 Do we need a glass of water for the coloured flower experiment? (a) needed (b) not needed
28. 28.True or false: a rubber eraser does not let water climb. (a) False (b) True
29. 29.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) food colour (b) a magnet (c) a few hours of waiting (d) a white flower
30. 30.💧 Which of these does not let water climb? (a) a paper towel (b) a cotton thread (c) a sugar cube (d) a steel spoon
31. 31.📘 What is it called when water climbs up thin tubes or paper by itself? (a) magnetism (b) capillary action (c) melting (d) evaporation
32. 32.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a white flower (b) a balloon (c) a few hours of waiting (d) a glass of water
33. 33.🧺 Do we need a few hours of waiting for the coloured flower experiment? (a) needed (b) not needed
34. 34.⚖️ 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 change it (c) we keep it the same
35. 35.💧 Dip a flower stem into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
36. 36.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) food colour (b) a glass of water (c) turmeric powder (d) a white flower
37. 37.🧺 Do we need a battery cell for the coloured flower experiment? (a) not needed (b) needed
38. 38.⚖️ 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) False (b) True
39. 39.⚖️ 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
40. 40.⚖️ 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 kept the same. (a) False (b) True

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