Capillary Action Flower Experiment Worksheet

Science experiments lesson 4: Colour-changing flower: capillary action · Set 640 · 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 should you do after handling food colour? (a) wipe them on walls (b) wash your hands (c) rub your eyes (d) lick your fingers
2. 2.⚖️ 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 length of the stem (c) the amount of water (d) the amount of colour
3. 3.🔮 Predict: a stem is split in two, one half in red water and one in blue. What do the petals do? (a) they stay white (b) they fall off at once (c) they turn two colours (d) they all turn green
4. 4.True or false: a battery cell is not needed for the coloured flower experiment. (a) False (b) True
5. 5.🔍 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
6. 6.🛟 Who should trim the flower stem? (a) a grown-up (b) a pet (c) a toddler (d) anyone, without looking
7. 7.🧺 Do we need a white flower for the coloured flower experiment? (a) not needed (b) needed
8. 8.🌼 Why do the petals keep pulling water up the stem? (a) petals are magnetic (b) the stem is hot (c) petals like colour (d) petals lose water to air
9. 9.True or false: a sugar cube lets water climb up it. (a) True (b) False
10. 10.🔮 Predict: a strip of paper towel dips into coloured water. What happens? (a) it turns to plastic (b) it sinks at once (c) nothing ever happens (d) colour climbs up it
11. 11.💧 Which of these does not let water climb? (a) a piece of foil (b) a strip of cloth (c) a flower stem (d) a paper towel
12. 12.📘 What is it called when water climbs up thin tubes or paper by itself? (a) magnetism (b) capillary action (c) melting (d) evaporation
13. 13.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a white flower (b) a few hours of waiting (c) food colour (d) a magnet
14. 14.🌼 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
15. 15.True or false: food colour is not needed for the coloured flower experiment. (a) False (b) True
16. 16.🧺 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 mirror (d) a white flower
17. 17.True or false: turmeric powder is needed for the coloured flower experiment. (a) False (b) True
18. 18.💧 Which of these does not let water climb? (a) a strip of cloth (b) a cotton thread (c) a flower stem (d) a glass marble
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 water (b) time for colour to show (c) the length of the stem
20. 20.🔍 Which is the odd one out? (a) a piece of foil (b) a cotton thread (c) a glass marble (d) a steel spoon
21. 21.🧺 Do we need a balloon for the coloured flower experiment? (a) needed (b) not needed
22. 22.⚖️ 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 change it (c) we keep it the same
23. 23.🔮 What would change if the flower stood in plain water? (a) no colour change (b) the petals turn red (c) the stem turns blue (d) the flower glows
24. 24.True or false: a strip of cloth does not let water climb. (a) True (b) False
25. 25.⚖️ 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
26. 26.True or false: food colour is needed for the coloured flower experiment. (a) False (b) True
27. 27.⚖️ 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
28. 28.True or false: a glass of water is not needed for the coloured flower experiment. (a) False (b) True
29. 29.🧺 Which of these is not needed for the coloured flower experiment? (a) food colour (b) a white flower (c) a magnet (d) a few hours of waiting
30. 30.⚖️ 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) True (b) False
31. 31.💧 Dip a rubber eraser into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
32. 32.🧺 Which of these is not needed for the coloured flower experiment? (a) food colour (b) a glass of water (c) a white flower (d) a battery cell
33. 33.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? True or false: the room it stands in is the one thing we change. (a) True (b) False
34. 34.💧 Dip a cotton thread into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
35. 35.🔍 Which is the odd one out? (a) a sugar cube (b) a piece of chalk (c) a cotton thread (d) a plastic ruler
36. 36.⚖️ 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 length of the stem (b) time for colour to show (c) the kind of flower
37. 37.True or false: a steel spoon does not let water climb. (a) False (b) True
38. 38.🧺 Do we need a battery cell for the coloured flower experiment? (a) needed (b) not needed
39. 39.🧺 Which of these is not needed for the coloured flower experiment? (a) food colour (b) a few hours of waiting (c) a white flower (d) a balloon
40. 40.💧 Dip a steel spoon into coloured water. Does the water climb up it? (a) water climbs up it (b) water does not climb

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