Capillary Action Flower Experiment Worksheet

Science experiments lesson 4: Colour-changing flower: capillary action · Set 639 · 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) the petals turn red (b) the stem turns blue (c) no colour change (d) the flower glows
2. 2.🧺 Which of these is not needed for the coloured flower experiment? (a) a glass of water (b) a white flower (c) a battery cell (d) a few hours of waiting
3. 3.🧺 Do we need food colour for the coloured flower experiment? (a) not needed (b) needed
4. 4.⚖️ 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 keep it the same (c) we change it
5. 5.💧 Which of these does not let water climb? (a) a strip of cloth (b) a cotton thread (c) a paper towel (d) a rubber eraser
6. 6.True or false: a glass marble lets water climb up it. (a) True (b) False
7. 7.⚖️ 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 colour (b) time for colour to show (c) the length of the stem
8. 8.⚖️ 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
9. 9.⚖️ 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
10. 10.True or false: a flower stem does not let water climb. (a) False (b) True
11. 11.True or false: a white flower is not needed for the coloured flower experiment. (a) True (b) False
12. 12.⚖️ 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
13. 13.🛟 Who should trim the flower stem? (a) a grown-up (b) a toddler (c) a pet (d) anyone, without looking
14. 14.🧺 Which of these is not needed for the coloured flower experiment? (a) a few hours of waiting (b) a glass of water (c) food colour (d) a balloon
15. 15.⚖️ 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) the kind of flower (c) time for colour to show
16. 16.💧 Which of these does not let water climb? (a) a sugar cube (b) a cotton thread (c) a strip of cloth (d) a steel spoon
17. 17.📘 What is it called when water climbs up thin tubes or paper by itself? (a) capillary action (b) evaporation (c) melting (d) magnetism
18. 18.🔍 Which is the odd one out? (a) a steel spoon (b) a rubber eraser (c) a plastic ruler (d) a flower stem
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 change it (b) we measure it (c) we keep it the same
20. 20.⚖️ 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 kind of flower
21. 21.💧 Dip a sugar cube into coloured water. Does the water climb up it? (a) water climbs up it (b) water does not climb
22. 22.⚖️ 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 keep it the same (b) we change it (c) we measure it
23. 23.🧺 Do we need a battery cell for the coloured flower experiment? (a) needed (b) not needed
24. 24.🧺 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 glass of water (d) a mirror
25. 25.🧺 Which of these is needed for the coloured flower experiment? (a) a balloon (b) yeast (c) a glass of water (d) a battery cell
26. 26.🧺 Which of these is not needed for the coloured flower experiment? (a) a white flower (b) turmeric powder (c) a glass of water (d) food colour
27. 27.⚖️ 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) False (b) True
28. 28.💧 Dip a piece of chalk into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
29. 29.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a glass of water (b) a balloon (c) a white flower (d) a few hours of waiting
30. 30.🌼 Why do the petals keep pulling water up the stem? (a) petals like colour (b) petals are magnetic (c) petals lose water to air (d) the stem is hot
31. 31.🔮 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 all turn green (d) they turn two colours
32. 32.🧺 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 glass of water (d) yeast
33. 33.⚖️ 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
34. 34.True or false: a magnet is needed for the coloured flower experiment. (a) True (b) False
35. 35.🧺 Do we need a balloon for the coloured flower experiment? (a) needed (b) not needed
36. 36.🔍 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 stem turns to ice (d) the flower floats away
37. 37.💧 Which of these lets water climb up it? (a) a cotton thread (b) a steel spoon (c) a glass marble (d) a plastic ruler
38. 38.🛟 What should you do after handling food colour? (a) lick your fingers (b) rub your eyes (c) wash your hands (d) wipe them on walls
39. 39.🧺 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) food colour (d) a magnet
40. 40.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? True or false: the kind of flower is what we measure. (a) False (b) True

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