Capillary Action Flower Experiment Worksheet

Science experiments lesson 4: Colour-changing flower: capillary action · Set 955 · 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.🔮 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 turn two colours (c) they fall off at once (d) they all turn green
2. 2.📘 What is it called when water climbs up thin tubes or paper by itself? (a) magnetism (b) melting (c) capillary action (d) evaporation
3. 3.🔮 What would change if the flower stood in plain water? (a) the stem turns blue (b) the petals turn red (c) the flower glows (d) no colour change
4. 4.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a battery cell (b) food colour (c) a glass of water (d) a white flower
5. 5.🔍 Which is the odd one out? (a) a flower stem (b) a steel spoon (c) a cotton thread (d) a sugar cube
6. 6.⚖️ 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 room it stands in (c) the length of the stem (d) the amount of water
7. 7.True or false: a plastic ruler lets water climb up it. (a) True (b) False
8. 8.💧 Which of these does not let water climb? (a) a strip of cloth (b) a cotton thread (c) a glass marble (d) a paper towel
9. 9.⚖️ 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 change it (c) we measure it
10. 10.⚖️ 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 keep it the same (c) we measure it
11. 11.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? True or false: the amount of colour is the one thing we change. (a) True (b) False
12. 12.🧺 Which of these is needed for the coloured flower experiment? (a) food colour (b) yeast (c) a magnet (d) a balloon
13. 13.🌼 How does coloured water reach the petals? (a) through the air (b) it rains on them (c) it is sprayed on (d) through tiny stem tubes
14. 14.🔍 Which is the odd one out? (a) a cotton thread (b) a plastic ruler (c) a flower stem (d) a strip of cloth
15. 15.⚖️ 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) True (b) False
16. 16.🔍 What do you see a day after a white flower stands in blue water? (a) the water turns green (b) the flower floats away (c) the petals turn bluish (d) the stem turns to ice
17. 17.True or false: a sugar cube does not let water climb. (a) True (b) False
18. 18.🧺 Do we need food colour for the coloured flower experiment? (a) not needed (b) needed
19. 19.🛟 Who should trim the flower stem? (a) a grown-up (b) a pet (c) a toddler (d) anyone, without looking
20. 20.🔍 Which is the odd one out? (a) a paper towel (b) a strip of cloth (c) a rubber eraser (d) a piece of chalk
21. 21.True or false: a battery cell is needed for the coloured flower experiment. (a) True (b) False
22. 22.🧺 Which of these is not needed for the coloured flower experiment? (a) a mirror (b) a white flower (c) a few hours of waiting (d) food colour
23. 23.🌼 Why do the petals keep pulling water up the stem? (a) petals lose water to air (b) petals are magnetic (c) petals like colour (d) the stem is hot
24. 24.🧺 Do we need a mirror for the coloured flower experiment? (a) needed (b) not needed
25. 25.⚖️ 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 room it stands in (b) the length of the stem (c) time for colour to show
26. 26.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) turmeric powder (b) a glass of water (c) food colour (d) a white flower
27. 27.🧺 Which of these is not needed for the coloured flower experiment? (a) a few hours of waiting (b) food colour (c) a magnet (d) a white flower
28. 28.True or false: a glass of water is not needed for the coloured flower experiment. (a) False (b) True
29. 29.💧 Which of these lets water climb up it? (a) a rubber eraser (b) a steel spoon (c) a strip of cloth (d) a piece of foil
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) True (b) False
31. 31.True or false: a white flower is not needed for the coloured flower experiment. (a) False (b) True
32. 32.💧 Dip a flower stem into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
33. 33.🧺 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 balloon (d) a glass of water
34. 34.🧺 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
35. 35.⚖️ 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 room it stands in (b) the length of the stem (c) the amount of colour (d) time for colour to show
36. 36.🧺 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) a magnet
37. 37.🧺 Do we need a battery cell for the coloured flower experiment? (a) not needed (b) needed
38. 38.True or false: a magnet is needed for the coloured flower experiment. (a) True (b) False
39. 39.⚖️ 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
40. 40.🔍 Which is the odd one out? (a) a sugar cube (b) a flower stem (c) a paper towel (d) a piece of foil

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