Capillary Action Flower Experiment Worksheet

Science experiments lesson 4: Colour-changing flower: capillary action · Set 904 · 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) yeast (b) food colour (c) a white flower (d) a few hours of waiting
2. 2.🔮 What would change if the flower stood in plain water? (a) the flower glows (b) the petals turn red (c) no colour change (d) the stem turns blue
3. 3.🛟 Who should trim the flower stem? (a) anyone, without looking (b) a pet (c) a toddler (d) a grown-up
4. 4.⚖️ 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
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 strip of paper towel dips into coloured water. What happens? (a) nothing ever happens (b) colour climbs up it (c) it turns to plastic (d) it sinks at once
7. 7.🔍 Which is the odd one out? (a) a piece of chalk (b) a steel spoon (c) a plastic ruler (d) a piece of foil
8. 8.🔍 Which is the odd one out? (a) a plastic ruler (b) a piece of foil (c) a glass marble (d) a flower stem
9. 9.🧺 Which of these is not needed for the coloured flower experiment? (a) a few hours of waiting (b) a battery cell (c) a white flower (d) food colour
10. 10.🧺 Which of these is needed for the coloured flower experiment? (a) yeast (b) food colour (c) a magnet (d) a balloon
11. 11.💧 Dip a piece of foil into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
12. 12.True or false: a strip of cloth lets water climb up it. (a) True (b) False
13. 13.🛟 What should you do after handling food colour? (a) wash your hands (b) lick your fingers (c) rub your eyes (d) wipe them on walls
14. 14.True or false: a paper towel lets water climb up it. (a) True (b) False
15. 15.💧 Which of these lets water climb up it? (a) a rubber eraser (b) a plastic ruler (c) a piece of foil (d) a flower stem
16. 16.💧 Which of these lets water climb up it? (a) a sugar cube (b) a steel spoon (c) a piece of foil (d) a glass marble
17. 17.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) food colour (b) a few hours of waiting (c) a battery cell (d) a white flower
18. 18.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? True or false: the kind of flower is the one thing we change. (a) True (b) False
19. 19.🌼 Why do the petals keep pulling water up the stem? (a) petals are magnetic (b) petals like colour (c) petals lose water to air (d) the stem is hot
20. 20.🔍 Which is the odd one out? (a) a glass marble (b) a plastic ruler (c) a steel spoon (d) a strip of cloth
21. 21.True or false: a magnet is needed for the coloured flower experiment. (a) False (b) True
22. 22.True or false: yeast 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? True or false: time for colour to show is kept the same. (a) False (b) True
24. 24.💧 Which of these does not let water climb? (a) a strip of cloth (b) a paper towel (c) a flower stem (d) a piece of foil
25. 25.🔮 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 all turn green (c) they turn two colours (d) they stay white
26. 26.🧺 Do we need a balloon for the coloured flower experiment? (a) not needed (b) needed
27. 27.🔍 Which is the odd one out? (a) a cotton thread (b) a rubber eraser (c) a piece of foil (d) a plastic ruler
28. 28.⚖️ 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 what we measure. (a) True (b) False
29. 29.True or false: a balloon is not needed for the coloured flower experiment. (a) True (b) False
30. 30.🌼 How does coloured water reach the petals? (a) it is sprayed on (b) through the air (c) it rains on them (d) through tiny stem tubes
31. 31.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) turmeric powder (b) a few hours of waiting (c) a glass of water (d) a white flower
32. 32.💧 Dip a piece of chalk into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
33. 33.🧺 Do we need food colour for the coloured flower experiment? (a) not needed (b) needed
34. 34.⚖️ 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 length of the stem (b) the kind of flower (c) time for colour to show (d) the amount of colour
35. 35.⚖️ 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 measure it (c) we change it
36. 36.True or false: a piece of chalk lets water climb up it. (a) False (b) True
37. 37.⚖️ 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 keep it the same (c) we change it
38. 38.True or false: a white flower is needed for the coloured flower experiment. (a) False (b) True
39. 39.⚖️ 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 amount of water
40. 40.🧺 Which of these is not needed for the coloured flower experiment? (a) a glass of water (b) a white flower (c) a magnet (d) a few hours of waiting

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