Capillary Action Flower Experiment Worksheet

Science experiments lesson 4: Colour-changing flower: capillary action · Set 363 · 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 all turn green (b) they stay white (c) they turn two colours (d) they fall off at once
2. 2.True or false: a few hours of waiting is not needed for the coloured flower experiment. (a) False (b) True
3. 3.🛟 Who should trim the flower stem? (a) a grown-up (b) a toddler (c) anyone, without looking (d) a pet
4. 4.⚖️ 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 amount of colour (c) the kind of flower (d) the length of the stem
5. 5.True or false: a flower stem lets water climb up it. (a) False (b) True
6. 6.⚖️ 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
7. 7.True or false: a plastic ruler lets water climb up it. (a) False (b) True
8. 8.🔍 Which is the odd one out? (a) a piece of chalk (b) a flower stem (c) a strip of cloth (d) a glass marble
9. 9.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? True or false: the amount of water is what we measure. (a) True (b) False
10. 10.🔮 Predict: a strip of paper towel dips into coloured water. What happens? (a) nothing ever happens (b) colour climbs up it (c) it turns to plastic (d) it sinks at once
11. 11.⚖️ 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 keep it the same (c) we measure it
12. 12.True or false: a piece of chalk does not let water climb. (a) True (b) False
13. 13.🔍 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
14. 14.💧 Dip a sugar cube into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
15. 15.💧 Dip a strip of cloth into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
16. 16.True or false: food colour is needed for the coloured flower experiment. (a) False (b) True
17. 17.🧺 Which of these is not needed for the coloured flower experiment? (a) a magnet (b) a glass of water (c) food colour (d) a few hours of waiting
18. 18.🧺 Which of these is needed for the coloured flower experiment? (a) a balloon (b) turmeric powder (c) food colour (d) a magnet
19. 19.💧 Which of these does not let water climb? (a) a paper towel (b) a strip of cloth (c) a piece of chalk (d) a plastic ruler
20. 20.True or false: turmeric powder is needed for the coloured flower experiment. (a) True (b) False
21. 21.🔍 Which is the odd one out? (a) a steel spoon (b) a rubber eraser (c) a strip of cloth (d) a plastic ruler
22. 22.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? True or false: the kind of flower is what we measure. (a) True (b) False
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 kept the same. (a) True (b) False
24. 24.True or false: a glass marble does not let water climb. (a) False (b) True
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 length of the stem (b) the kind of flower (c) time for colour to show
26. 26.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) food colour (b) a glass of water (c) a white flower (d) turmeric powder
27. 27.True or false: turmeric powder is not needed for the coloured flower experiment. (a) False (b) True
28. 28.True or false: a paper towel does not let water climb. (a) False (b) True
29. 29.💧 Dip a glass marble into coloured water. Does the water climb up it? (a) water climbs up it (b) water does not climb
30. 30.🌼 How does coloured water reach the petals? (a) it rains on them (b) it is sprayed on (c) through tiny stem tubes (d) through the air
31. 31.True or false: a mirror is not needed for the coloured flower experiment. (a) False (b) True
32. 32.⚖️ 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
33. 33.⚖️ 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 keep it the same (b) we measure it (c) we change it
34. 34.⚖️ 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 change it (b) we keep it the same (c) we measure it
35. 35.📘 What is it called when water climbs up thin tubes or paper by itself? (a) evaporation (b) capillary action (c) magnetism (d) melting
36. 36.⚖️ 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 kind of flower (d) time for colour to show
37. 37.🔮 What would change if the flower stood in plain water? (a) the petals turn red (b) no colour change (c) the flower glows (d) the stem turns blue
38. 38.True or false: a white flower is needed for the coloured flower experiment. (a) False (b) True
39. 39.True or false: yeast is not needed for the coloured flower experiment. (a) True (b) False
40. 40.True or false: a few hours of waiting is needed for the coloured flower experiment. (a) True (b) False

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