Capillary Action Flower Experiment Worksheet

Science experiments lesson 4: Colour-changing flower: capillary action · Set 537 · 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.🔍 Which is the odd one out? (a) a strip of cloth (b) a cotton thread (c) a flower stem (d) a plastic ruler
2. 2.🔮 Predict: a strip of paper towel dips into coloured water. What happens? (a) nothing ever happens (b) it sinks at once (c) it turns to plastic (d) colour climbs up it
3. 3.🧺 Do we need a balloon for the coloured flower experiment? (a) needed (b) not needed
4. 4.🧺 Which of these is needed for the coloured flower experiment? (a) a mirror (b) a battery cell (c) food colour (d) turmeric powder
5. 5.🧺 Which of these is not needed for the coloured flower experiment? (a) a white flower (b) a glass of water (c) food colour (d) a balloon
6. 6.🧺 Which of these is not needed for the coloured flower experiment? (a) a white flower (b) food colour (c) a glass of water (d) turmeric powder
7. 7.💧 Which of these does not let water climb? (a) a piece of chalk (b) a cotton thread (c) a strip of cloth (d) a rubber eraser
8. 8.🔮 Predict: a stem is split in two, one half in red water and one in blue. What do the petals do? (a) they turn two colours (b) they fall off at once (c) they stay white (d) they all turn green
9. 9.💧 Which of these lets water climb up it? (a) a glass marble (b) a piece of foil (c) a rubber eraser (d) a strip of cloth
10. 10.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a few hours of waiting (b) a magnet (c) a white flower (d) food colour
11. 11.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? True or false: the kind of flower is kept the same. (a) True (b) False
12. 12.True or false: food colour is not needed for the coloured flower experiment. (a) True (b) False
13. 13.🧺 Which of these is not needed for the coloured flower experiment? (a) a few hours of waiting (b) a glass of water (c) food colour (d) a magnet
14. 14.⚖️ 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 amount of colour (b) time for colour to show (c) the kind of flower (d) the room it stands in
15. 15.🧺 Do we need food colour for the coloured flower experiment? (a) not needed (b) needed
16. 16.💧 Dip a rubber eraser into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
17. 17.⚖️ 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 change it (c) we measure it
18. 18.True or false: a sugar cube lets water climb up it. (a) False (b) True
19. 19.🔍 Which is the odd one out? (a) a cotton thread (b) a sugar cube (c) a flower stem (d) a steel spoon
20. 20.🌼 Why do the petals keep pulling water up the stem? (a) petals lose water to air (b) the stem is hot (c) petals like colour (d) petals are magnetic
21. 21.💧 Which of these does not let water climb? (a) a paper towel (b) a piece of foil (c) a cotton thread (d) a flower stem
22. 22.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a mirror (b) food colour (c) a white flower (d) a few hours of waiting
23. 23.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a balloon (b) a glass of water (c) a few hours of waiting (d) food colour
24. 24.🧺 Do we need a magnet for the coloured flower experiment? (a) not needed (b) needed
25. 25.🛟 What should you do after handling food colour? (a) rub your eyes (b) lick your fingers (c) wipe them on walls (d) wash your hands
26. 26.True or false: a cotton thread does not let water climb. (a) True (b) False
27. 27.💧 Dip a strip of cloth into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
28. 28.True or false: a battery cell is not needed for the coloured flower experiment. (a) True (b) False
29. 29.💧 Which of these lets water climb up it? (a) a rubber eraser (b) a flower stem (c) a plastic ruler (d) a glass marble
30. 30.⚖️ 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 kind of flower (c) the length of the stem (d) the room it stands in
31. 31.🧺 Do we need a glass of water for the coloured flower experiment? (a) needed (b) not needed
32. 32.True or false: a magnet is needed for the coloured flower experiment. (a) True (b) False
33. 33.⚖️ 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
34. 34.🛟 Who should trim the flower stem? (a) a grown-up (b) a toddler (c) anyone, without looking (d) a pet
35. 35.📘 What is it called when water climbs up thin tubes or paper by itself? (a) capillary action (b) melting (c) magnetism (d) evaporation
36. 36.🔮 What would change if the flower stood in plain water? (a) no colour change (b) the stem turns blue (c) the flower glows (d) the petals turn red
37. 37.True or false: yeast is needed for the coloured flower experiment. (a) False (b) True
38. 38.🔍 What do you see a day after a white flower stands in blue water? (a) the water turns green (b) the stem turns to ice (c) the flower floats away (d) the petals turn bluish
39. 39.True or false: a balloon is not needed for the coloured flower experiment. (a) False (b) True
40. 40.🧺 Do we need a white flower for the coloured flower experiment? (a) not needed (b) needed

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