Capillary Action Flower Experiment Worksheet

Science experiments lesson 4: Colour-changing flower: capillary action · Set 751 · 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) no colour change (b) the petals turn red (c) the stem turns blue (d) the flower glows
2. 2.💧 Dip a rubber eraser into coloured water. Does the water climb up it? (a) water climbs up it (b) water does not climb
3. 3.⚖️ 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
4. 4.🔍 What do you see a day after a white flower stands in blue water? (a) the flower floats away (b) the water turns green (c) the stem turns to ice (d) the petals turn bluish
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) time for colour to show (b) the amount of colour (c) the length of the stem
6. 6.🔍 Which is the odd one out? (a) a strip of cloth (b) a paper towel (c) a rubber eraser (d) a piece of chalk
7. 7.🧺 Which of these is needed for the coloured flower experiment? (a) a battery cell (b) a magnet (c) food colour (d) turmeric powder
8. 8.🌼 Why do the petals keep pulling water up the stem? (a) petals are magnetic (b) petals like colour (c) the stem is hot (d) petals lose water to air
9. 9.💧 Dip a paper towel into coloured water. Does the water climb up it? (a) water climbs up it (b) water does not climb
10. 10.📘 What is it called when water climbs up thin tubes or paper by itself? (a) capillary action (b) melting (c) magnetism (d) evaporation
11. 11.🧺 Do we need a balloon for the coloured flower experiment? (a) needed (b) not needed
12. 12.🔮 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 turn two colours (c) they stay white (d) they all turn green
13. 13.⚖️ 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) False (b) True
14. 14.True or false: a white flower is needed for the coloured flower experiment. (a) False (b) True
15. 15.💧 Dip a piece of chalk into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
16. 16.🧺 Do we need a glass of water for the coloured flower experiment? (a) needed (b) not needed
17. 17.💧 Which of these does not let water climb? (a) a paper towel (b) a strip of cloth (c) a steel spoon (d) a piece of chalk
18. 18.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a glass of water (b) food colour (c) yeast (d) a white flower
19. 19.True or false: a battery cell is needed for the coloured flower experiment. (a) True (b) False
20. 20.⚖️ 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 measure it (b) we keep it the same (c) we change it
21. 21.🧺 Do we need a mirror for the coloured flower experiment? (a) needed (b) not needed
22. 22.⚖️ 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
23. 23.💧 Dip a strip of cloth into coloured water. Does the water climb up it? (a) water climbs up it (b) water does not climb
24. 24.🧺 Do we need a magnet for the coloured flower experiment? (a) not needed (b) needed
25. 25.🧺 Do we need turmeric powder for the coloured flower experiment? (a) not needed (b) needed
26. 26.💧 Which of these lets water climb up it? (a) a steel spoon (b) a glass marble (c) a flower stem (d) a plastic ruler
27. 27.⚖️ 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
28. 28.🛟 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
29. 29.🧺 Which of these is not needed for the coloured flower experiment? (a) a mirror (b) a glass of water (c) food colour (d) a white flower
30. 30.🛟 Who should trim the flower stem? (a) a toddler (b) a grown-up (c) anyone, without looking (d) a pet
31. 31.⚖️ 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 colour (b) time for colour to show (c) the room it stands in (d) the kind of flower
32. 32.True or false: turmeric powder is needed for the coloured flower experiment. (a) True (b) False
33. 33.💧 Which of these lets water climb up it? (a) a piece of foil (b) a steel spoon (c) a glass marble (d) a strip of cloth
34. 34.⚖️ 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 amount of colour (b) time for colour to show (c) the length of the stem (d) the kind of flower
35. 35.🔮 Predict: a strip of paper towel dips into coloured water. What happens? (a) it turns to plastic (b) it sinks at once (c) nothing ever happens (d) colour climbs up it
36. 36.True or false: a balloon is needed for the coloured flower experiment. (a) False (b) True
37. 37.🧺 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
38. 38.💧 Which of these does not let water climb? (a) a plastic ruler (b) a paper towel (c) a cotton thread (d) a strip of cloth
39. 39.🧺 Which of these is not needed for the coloured flower experiment? (a) a glass of water (b) a white flower (c) turmeric powder (d) a few hours of waiting
40. 40.🧺 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 white flower (d) a balloon

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