Capillary Action Flower Experiment Worksheet

Science experiments lesson 4: Colour-changing flower: capillary action · Set 608 · 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.🌼 Why do the petals keep pulling water up the stem? (a) petals like colour (b) the stem is hot (c) petals lose water to air (d) petals are magnetic
2. 2.💧 Which of these lets water climb up it? (a) a piece of foil (b) a cotton thread (c) a glass marble (d) a plastic ruler
3. 3.⚖️ 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) True (b) False
4. 4.🔍 Which is the odd one out? (a) a piece of foil (b) a glass marble (c) a piece of chalk (d) a steel spoon
5. 5.🔍 What do you see a day after a white flower stands in blue water? (a) the petals turn bluish (b) the stem turns to ice (c) the water turns green (d) the flower floats away
6. 6.🧺 Which of these is not needed for the coloured flower experiment? (a) a balloon (b) food colour (c) a few hours of waiting (d) a white flower
7. 7.🌼 How does coloured water reach the petals? (a) through tiny stem tubes (b) it is sprayed on (c) through the air (d) it rains on them
8. 8.💧 Which of these does not let water climb? (a) a glass marble (b) a strip of cloth (c) a cotton thread (d) a flower stem
9. 9.🔮 Predict: a stem is split in two, one half in red water and one in blue. What do the petals do? (a) they all turn green (b) they fall off at once (c) they stay white (d) they turn two colours
10. 10.🛟 Who should trim the flower stem? (a) a pet (b) a toddler (c) a grown-up (d) anyone, without looking
11. 11.🛟 What should you do after handling food colour? (a) wipe them on walls (b) lick your fingers (c) rub your eyes (d) wash your hands
12. 12.⚖️ 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 kept the same. (a) False (b) True
13. 13.💧 Dip a plastic ruler into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
14. 14.🔍 Which is the odd one out? (a) a plastic ruler (b) a flower stem (c) a piece of chalk (d) a strip of cloth
15. 15.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a few hours of waiting (b) a white flower (c) a balloon (d) a glass of water
16. 16.💧 Dip a glass marble into coloured water. Does the water climb up it? (a) water climbs up it (b) water does not climb
17. 17.⚖️ 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) False (b) True
18. 18.⚖️ 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 length of the stem (b) the room it stands in (c) the amount of water (d) the amount of colour
19. 19.⚖️ 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
20. 20.True or false: a mirror is needed for the coloured flower experiment. (a) False (b) True
21. 21.🧺 Do we need food colour for the coloured flower experiment? (a) needed (b) not needed
22. 22.🧺 Which of these is needed for the coloured flower experiment? (a) a mirror (b) a few hours of waiting (c) a magnet (d) yeast
23. 23.⚖️ 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
24. 24.🔮 What would change if the flower stood in plain water? (a) the petals turn red (b) no colour change (c) the stem turns blue (d) the flower glows
25. 25.🔮 Predict: a strip of paper towel dips into coloured water. What happens? (a) nothing ever happens (b) it turns to plastic (c) it sinks at once (d) colour climbs up it
26. 26.⚖️ 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
27. 27.⚖️ 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) True (b) False
28. 28.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a glass of water (b) food colour (c) a few hours of waiting (d) a mirror
29. 29.True or false: a glass marble does not let water climb. (a) True (b) False
30. 30.True or false: a balloon is not needed for the coloured flower experiment. (a) False (b) True
31. 31.🧺 Do we need a balloon for the coloured flower experiment? (a) needed (b) not needed
32. 32.🔍 Which is the odd one out? (a) a plastic ruler (b) a rubber eraser (c) a piece of foil (d) a flower stem
33. 33.💧 Which of these does not let water climb? (a) a strip of cloth (b) a paper towel (c) a steel spoon (d) a cotton thread
34. 34.📘 What is it called when water climbs up thin tubes or paper by itself? (a) evaporation (b) magnetism (c) melting (d) capillary action
35. 35.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) food colour (b) a white flower (c) a few hours of waiting (d) yeast
36. 36.🧺 Which of these is not needed for the coloured flower experiment? (a) a glass of water (b) a white flower (c) food colour (d) yeast
37. 37.⚖️ 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
38. 38.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a few hours of waiting (b) a glass of water (c) a white flower (d) turmeric powder
39. 39.🧺 Do we need a magnet for the coloured flower experiment? (a) not needed (b) needed
40. 40.🧺 Do we need a white flower for the coloured flower experiment? (a) not needed (b) needed

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