Capillary Action Flower Experiment Worksheet

Science experiments lesson 4: Colour-changing flower: capillary action · Set 369 · 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? Which of these is the one thing we change? (a) the amount of colour (b) the length of the stem (c) the room it stands in (d) the amount of water
2. 2.True or false: a paper towel lets water climb up it. (a) True (b) False
3. 3.💧 Dip a sugar cube into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
4. 4.🧺 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 glass of water (d) turmeric powder
5. 5.🔮 Predict: a strip of paper towel dips into coloured water. What happens? (a) it sinks at once (b) nothing ever happens (c) it turns to plastic (d) colour climbs up it
6. 6.🔮 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 all turn green (c) they turn two colours (d) they stay white
7. 7.True or false: a paper towel does not let water climb. (a) True (b) False
8. 8.🔍 What do you see a day after a white flower stands in blue water? (a) the water turns green (b) the stem turns to ice (c) the flower floats away (d) the petals turn bluish
9. 9.True or false: a white flower is not needed for the coloured flower experiment. (a) True (b) False
10. 10.🔮 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
11. 11.📘 What is it called when water climbs up thin tubes or paper by itself? (a) capillary action (b) melting (c) magnetism (d) evaporation
12. 12.🛟 What should you do after handling food colour? (a) rub your eyes (b) wash your hands (c) wipe them on walls (d) lick your fingers
13. 13.True or false: a white flower is needed for the coloured flower experiment. (a) True (b) False
14. 14.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a few hours of waiting (b) a magnet (c) food colour (d) a white flower
15. 15.True or false: a plastic ruler lets water climb up it. (a) False (b) True
16. 16.⚖️ 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 measure it (c) we change it
17. 17.True or false: a few hours of waiting is not needed for the coloured flower experiment. (a) True (b) False
18. 18.🧺 Which of these is needed for the coloured flower experiment? (a) a white flower (b) a mirror (c) a battery cell (d) a magnet
19. 19.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a white flower (b) food colour (c) a glass of water (d) a balloon
20. 20.True or false: yeast is needed for the coloured flower experiment. (a) True (b) False
21. 21.True or false: a rubber eraser does not let water climb. (a) True (b) False
22. 22.🧺 Do we need a white flower for the coloured flower experiment? (a) not needed (b) needed
23. 23.⚖️ 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) the room it stands in (c) the kind of flower (d) time for colour to show
24. 24.🧺 Which of these is not needed for the coloured flower experiment? (a) a few hours of waiting (b) a glass of water (c) a magnet (d) food colour
25. 25.⚖️ 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
26. 26.True or false: a glass of water is not needed for the coloured flower experiment. (a) False (b) True
27. 27.🧺 Do we need yeast for the coloured flower experiment? (a) needed (b) not needed
28. 28.True or false: a rubber eraser lets water climb up it. (a) True (b) False
29. 29.💧 Dip a flower stem into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
30. 30.🧺 Which of these is needed for the coloured flower experiment? (a) turmeric powder (b) food colour (c) a balloon (d) a battery cell
31. 31.🌼 How does coloured water reach the petals? (a) it rains on them (b) through the air (c) through tiny stem tubes (d) it is sprayed on
32. 32.🛟 Who should trim the flower stem? (a) a toddler (b) a pet (c) anyone, without looking (d) a grown-up
33. 33.🧺 Which of these is needed for the coloured flower experiment? (a) a magnet (b) a battery cell (c) a balloon (d) a glass of water
34. 34.🔍 Which is the odd one out? (a) a flower stem (b) a cotton thread (c) a piece of chalk (d) a piece of foil
35. 35.💧 Dip a rubber eraser into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
36. 36.True or false: a steel spoon lets water climb up it. (a) False (b) True
37. 37.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a few hours of waiting (b) a mirror (c) food colour (d) a white flower
38. 38.🧺 Do we need a balloon for the coloured flower experiment? (a) not needed (b) needed
39. 39.⚖️ 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
40. 40.🧺 Do we need food colour for the coloured flower experiment? (a) needed (b) not needed

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