Capillary Action Flower Experiment Worksheet

Science experiments lesson 4: Colour-changing flower: capillary action · Set 926 · 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.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a white flower (b) a mirror (c) a few hours of waiting (d) food colour
2. 2.🔮 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 stay white (c) they turn two colours (d) they all turn green
3. 3.⚖️ 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 water (b) the length of the stem (c) time for colour to show (d) the kind of flower
4. 4.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? True or false: the amount of water is what we measure. (a) True (b) False
5. 5.🔍 Which is the odd one out? (a) a paper towel (b) a piece of chalk (c) a glass marble (d) a flower stem
6. 6.True or false: a glass of water is not needed for the coloured flower experiment. (a) True (b) False
7. 7.🔮 What would change if the flower stood in plain water? (a) the flower glows (b) no colour change (c) the stem turns blue (d) the petals turn red
8. 8.🔍 What do you see a day after a white flower stands in blue water? (a) the petals turn bluish (b) the water turns green (c) the flower floats away (d) the stem turns to ice
9. 9.🧺 Do we need turmeric powder for the coloured flower experiment? (a) needed (b) not needed
10. 10.True or false: a plastic ruler does not let water climb. (a) True (b) False
11. 11.⚖️ 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 measure it (c) we keep it the same
12. 12.🔮 Predict: a strip of paper towel dips into coloured water. What happens? (a) it sinks at once (b) it turns to plastic (c) colour climbs up it (d) nothing ever happens
13. 13.True or false: a rubber eraser lets water climb up it. (a) False (b) True
14. 14.⚖️ 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 what we measure. (a) False (b) True
15. 15.🧺 Which of these is not needed for the coloured flower experiment? (a) a white flower (b) a glass of water (c) a mirror (d) food colour
16. 16.💧 Which of these lets water climb up it? (a) a piece of foil (b) a paper towel (c) a rubber eraser (d) a steel spoon
17. 17.🧺 Which of these is needed for the coloured flower experiment? (a) a magnet (b) a glass of water (c) turmeric powder (d) a balloon
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) False (b) True
19. 19.🛟 Who should trim the flower stem? (a) a pet (b) a toddler (c) a grown-up (d) anyone, without looking
20. 20.⚖️ 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) False (b) True
21. 21.True or false: a strip of cloth lets water climb up it. (a) False (b) True
22. 22.🔍 Which is the odd one out? (a) a strip of cloth (b) a plastic ruler (c) a piece of chalk (d) a paper towel
23. 23.🌼 How does coloured water reach the petals? (a) through the air (b) it is sprayed on (c) it rains on them (d) through tiny stem tubes
24. 24.💧 Dip a flower stem into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
25. 25.⚖️ 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
26. 26.💧 Which of these lets water climb up it? (a) a cotton thread (b) a steel spoon (c) a rubber eraser (d) a glass marble
27. 27.True or false: a flower stem does not let water climb. (a) False (b) True
28. 28.📘 What is it called when water climbs up thin tubes or paper by itself? (a) magnetism (b) melting (c) evaporation (d) capillary action
29. 29.True or false: turmeric powder is not needed for the coloured flower experiment. (a) True (b) False
30. 30.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? True or false: the amount of colour is kept the same. (a) False (b) True
31. 31.🧺 Do we need a balloon for the coloured flower experiment? (a) needed (b) not needed
32. 32.💧 Dip a strip of cloth into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
33. 33.🌼 Why do the petals keep pulling water up the stem? (a) petals like colour (b) petals lose water to air (c) the stem is hot (d) petals are magnetic
34. 34.🧺 Which of these is needed for the coloured flower experiment? (a) a battery cell (b) yeast (c) a few hours of waiting (d) a magnet
35. 35.True or false: a piece of foil does not let water climb. (a) False (b) True
36. 36.🧺 Do we need food colour for the coloured flower experiment? (a) needed (b) not needed
37. 37.🧺 Which of these is needed for the coloured flower experiment? (a) yeast (b) a magnet (c) food colour (d) turmeric powder
38. 38.⚖️ 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 what we measure. (a) False (b) True
39. 39.True or false: a paper towel lets water climb up it. (a) True (b) False
40. 40.🧺 Which of these is needed for the coloured flower experiment? (a) a magnet (b) yeast (c) turmeric powder (d) a white flower

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