Capillary Action Flower Experiment Worksheet

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

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