Capillary Action Flower Experiment Worksheet

Science experiments lesson 4: Colour-changing flower: capillary action · Set 251 · 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.💧 Which of these does not let water climb? (a) a paper towel (b) a cotton thread (c) a plastic ruler (d) a strip of cloth
2. 2.🌼 How does coloured water reach the petals? (a) it rains on them (b) through tiny stem tubes (c) it is sprayed on (d) through the air
3. 3.🔮 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 turn two colours (d) they all turn green
4. 4.🔍 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
5. 5.⚖️ 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 water (b) the length of the stem (c) time for colour to show
6. 6.🧺 Which of these is needed for the coloured flower experiment? (a) a balloon (b) a magnet (c) a battery cell (d) food colour
7. 7.🧺 Which of these is not needed for the coloured flower experiment? (a) food colour (b) a glass of water (c) a magnet (d) a white flower
8. 8.🧺 Do we need a battery cell for the coloured flower experiment? (a) not needed (b) needed
9. 9.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a white flower (b) yeast (c) a glass of water (d) food colour
10. 10.🧺 Which of these is not needed for the coloured flower experiment? (a) food colour (b) a glass of water (c) a balloon (d) a few hours of waiting
11. 11.🧺 Which of these is not needed for the coloured flower experiment? (a) a white flower (b) turmeric powder (c) a few hours of waiting (d) food colour
12. 12.💧 Dip a piece of foil into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
13. 13.🛟 Who should trim the flower stem? (a) anyone, without looking (b) a toddler (c) a pet (d) a grown-up
14. 14.🧺 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 white flower (d) a magnet
15. 15.🧺 Which of these is not needed for the coloured flower experiment? (a) a mirror (b) food colour (c) a white flower (d) a few hours of waiting
16. 16.True or false: a cotton thread does not let water climb. (a) True (b) False
17. 17.💧 Which of these does not let water climb? (a) a flower stem (b) a cotton thread (c) a paper towel (d) a piece of foil
18. 18.🧺 Do we need yeast for the coloured flower experiment? (a) not needed (b) needed
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 colour”? (a) we change it (b) we measure it (c) we keep it the same
20. 20.🔮 Predict: a strip of paper towel dips into coloured water. What happens? (a) it sinks at once (b) colour climbs up it (c) it turns to plastic (d) nothing ever happens
21. 21.⚖️ 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) time for colour to show (d) the amount of water
22. 22.⚖️ 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) time for colour to show (c) the length of the stem
23. 23.⚖️ 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) time for colour to show (c) the length of the stem (d) the amount of colour
24. 24.⚖️ 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 measure it (b) we keep it the same (c) we change it
25. 25.True or false: a battery cell is not needed for the coloured flower experiment. (a) False (b) True
26. 26.🧺 Do we need a balloon for the coloured flower experiment? (a) needed (b) not needed
27. 27.🔍 Which is the odd one out? (a) a flower stem (b) a cotton thread (c) a rubber eraser (d) a strip of cloth
28. 28.True or false: turmeric powder is needed for the coloured flower experiment. (a) False (b) True
29. 29.🧺 Do we need a magnet for the coloured flower experiment? (a) needed (b) not needed
30. 30.🧺 Do we need turmeric powder for the coloured flower experiment? (a) needed (b) not needed
31. 31.🔮 What would change if the flower stood in plain water? (a) the stem turns blue (b) the flower glows (c) no colour change (d) the petals turn red
32. 32.🛟 What should you do after handling food colour? (a) wipe them on walls (b) lick your fingers (c) wash your hands (d) rub your eyes
33. 33.True or false: a glass marble lets water climb up it. (a) True (b) False
34. 34.True or false: a rubber eraser lets water climb up it. (a) True (b) False
35. 35.🧺 Do we need a few hours of waiting for the coloured flower experiment? (a) not needed (b) needed
36. 36.💧 Dip a plastic ruler into coloured water. Does the water climb up it? (a) water climbs up it (b) water does not climb
37. 37.True or false: a strip of cloth lets water climb up it. (a) True (b) False
38. 38.⚖️ 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
39. 39.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? What do we do with “time for colour to show”? (a) we change it (b) we measure it (c) we keep it the same
40. 40.True or false: a white flower is needed for the coloured flower experiment. (a) False (b) True

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