Capillary Action Flower Experiment Worksheet

Science experiments lesson 4: Colour-changing flower: capillary action · Set 127 · 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 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
2. 2.🧺 Do we need a magnet for the coloured flower experiment? (a) needed (b) not needed
3. 3.🛟 Who should trim the flower stem? (a) a pet (b) a grown-up (c) a toddler (d) anyone, without looking
4. 4.True or false: a glass of water is needed for the coloured flower experiment. (a) True (b) False
5. 5.📘 What is it called when water climbs up thin tubes or paper by itself? (a) evaporation (b) capillary action (c) magnetism (d) melting
6. 6.🔮 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
7. 7.🧺 Which of these is needed for the coloured flower experiment? (a) a white flower (b) a magnet (c) a mirror (d) a balloon
8. 8.🛟 What should you do after handling food colour? (a) rub your eyes (b) wash your hands (c) wipe them on walls (d) lick your fingers
9. 9.🧺 Which of these is not needed for the coloured flower experiment? (a) a white flower (b) food colour (c) yeast (d) a few hours of waiting
10. 10.⚖️ 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 kept the same. (a) True (b) False
11. 11.🧺 Do we need a white flower for the coloured flower experiment? (a) needed (b) not needed
12. 12.🔮 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
13. 13.⚖️ 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
14. 14.💧 Dip a cotton thread into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
15. 15.True or false: food colour is not needed for the coloured flower experiment. (a) True (b) False
16. 16.🔍 Which is the odd one out? (a) a paper towel (b) a rubber eraser (c) a steel spoon (d) a piece of foil
17. 17.💧 Dip a flower stem into coloured water. Does the water climb up it? (a) water climbs up it (b) water does not climb
18. 18.💧 Dip a rubber eraser into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
19. 19.🧺 Which of these is not needed for the coloured flower experiment? (a) turmeric powder (b) a glass of water (c) a few hours of waiting (d) food colour
20. 20.True or false: a battery cell is not needed for the coloured flower experiment. (a) False (b) True
21. 21.🧺 Which of these is needed for the coloured flower experiment? (a) a balloon (b) a glass of water (c) yeast (d) turmeric powder
22. 22.True or false: a balloon is not needed for the coloured flower experiment. (a) False (b) True
23. 23.⚖️ 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 kind of flower (d) the amount of colour
24. 24.🔍 What do you see a day after a white flower stands in blue water? (a) the water turns green (b) the flower floats away (c) the petals turn bluish (d) the stem turns to ice
25. 25.🔍 Which is the odd one out? (a) a paper towel (b) a piece of chalk (c) a strip of cloth (d) a plastic ruler
26. 26.True or false: a battery cell is needed for the coloured flower experiment. (a) True (b) False
27. 27.🌼 How does coloured water reach the petals? (a) it is sprayed on (b) through the air (c) through tiny stem tubes (d) it rains on them
28. 28.True or false: turmeric powder is needed for the coloured flower experiment. (a) True (b) False
29. 29.💧 Dip a paper towel into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
30. 30.💧 Which of these lets water climb up it? (a) a steel spoon (b) a plastic ruler (c) a strip of cloth (d) a piece of foil
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 kind of flower (c) the length of the stem (d) the amount of colour
32. 32.True or false: a rubber eraser lets water climb up it. (a) False (b) True
33. 33.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a glass of water (b) turmeric powder (c) a white flower (d) food colour
34. 34.True or false: a white flower is needed for the coloured flower experiment. (a) True (b) False
35. 35.True or false: turmeric powder is not needed for the coloured flower experiment. (a) False (b) True
36. 36.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? What do we do with “the room it stands in”? (a) we keep it the same (b) we change it (c) we measure it
37. 37.True or false: a few hours of waiting is not needed for the coloured flower experiment. (a) False (b) True
38. 38.💧 Dip a plastic ruler into coloured water. Does the water climb up it? (a) water climbs up it (b) water does not climb
39. 39.🔍 Which is the odd one out? (a) a paper towel (b) a glass marble (c) a flower stem (d) a cotton thread
40. 40.💧 Which of these does not let water climb? (a) a paper towel (b) a cotton thread (c) a strip of cloth (d) a steel spoon

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