Capillary Action Flower Experiment Worksheet

Science experiments lesson 4: Colour-changing flower: capillary action · Set 598 · 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.⚖️ 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
2. 2.🧺 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
3. 3.🛟 Who should trim the flower stem? (a) a toddler (b) anyone, without looking (c) a grown-up (d) a pet
4. 4.💧 Dip a cotton thread into coloured water. Does the water climb up it? (a) water climbs up it (b) water does not climb
5. 5.🔮 What would change if the flower stood in plain water? (a) no colour change (b) the petals turn red (c) the stem turns blue (d) the flower glows
6. 6.True or false: a flower stem does not let water climb. (a) False (b) True
7. 7.📘 What is it called when water climbs up thin tubes or paper by itself? (a) melting (b) evaporation (c) capillary action (d) magnetism
8. 8.💧 Dip a plastic ruler into coloured water. Does the water climb up it? (a) water climbs up it (b) water does not climb
9. 9.True or false: a flower stem lets water climb up it. (a) True (b) False
10. 10.⚖️ 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) time for colour to show (b) the kind of flower (c) the room it stands in (d) the length of the stem
11. 11.🧺 Do we need a battery cell for the coloured flower experiment? (a) not needed (b) needed
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 what we measure. (a) True (b) False
13. 13.⚖️ 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 amount of colour (c) time for colour to show
14. 14.True or false: a rubber eraser lets water climb up it. (a) False (b) True
15. 15.⚖️ 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 amount of water (b) the length of the stem (c) time for colour to show (d) the kind of flower
16. 16.💧 Which of these lets water climb up it? (a) a piece of foil (b) a plastic ruler (c) a sugar cube (d) a steel spoon
17. 17.True or false: a plastic ruler lets water climb up it. (a) False (b) True
18. 18.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a white flower (b) a few hours of waiting (c) a battery cell (d) a glass of water
19. 19.True or false: a mirror is needed for the coloured flower experiment. (a) True (b) False
20. 20.🧺 Which of these is not needed for the coloured flower experiment? (a) a white flower (b) a glass of water (c) food colour (d) a mirror
21. 21.🔍 Which is the odd one out? (a) a cotton thread (b) a piece of foil (c) a plastic ruler (d) a rubber eraser
22. 22.🔮 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 all turn green (d) they turn two colours
23. 23.⚖️ 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
24. 24.🌼 Why do the petals keep pulling water up the stem? (a) the stem is hot (b) petals like colour (c) petals are magnetic (d) petals lose water to air
25. 25.🧺 Which of these is not needed for the coloured flower experiment? (a) a battery cell (b) a glass of water (c) a white flower (d) food colour
26. 26.🔮 Predict: a strip of paper towel dips into coloured water. What happens? (a) colour climbs up it (b) it sinks at once (c) nothing ever happens (d) it turns to plastic
27. 27.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a glass of water (b) a few hours of waiting (c) yeast (d) a white flower
28. 28.🔍 What do you see a day after a white flower stands in blue water? (a) the flower floats away (b) the petals turn bluish (c) the water turns green (d) the stem turns to ice
29. 29.💧 Which of these lets water climb up it? (a) a piece of foil (b) a steel spoon (c) a rubber eraser (d) a cotton thread
30. 30.True or false: a glass marble does not let water climb. (a) False (b) True
31. 31.🧺 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 magnet (d) a white flower
32. 32.🔍 Which is the odd one out? (a) a sugar cube (b) a piece of foil (c) a paper towel (d) a cotton thread
33. 33.🧺 Do we need a glass of water for the coloured flower experiment? (a) not needed (b) needed
34. 34.🧺 Do we need a balloon for the coloured flower experiment? (a) needed (b) not needed
35. 35.⚖️ 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 the one thing we change. (a) False (b) True
36. 36.🧺 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 mirror (d) a white flower
37. 37.💧 Dip a piece of chalk into coloured water. Does the water climb up it? (a) water climbs up it (b) water does not climb
38. 38.True or false: a paper towel lets water climb up it. (a) True (b) False
39. 39.⚖️ 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
40. 40.🧺 Which of these is needed for the coloured flower experiment? (a) a few hours of waiting (b) yeast (c) a magnet (d) a mirror

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