Capillary Action Flower Experiment Worksheet

Science experiments lesson 4: Colour-changing flower: capillary action · Set 550 · 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 what we measure? (a) the amount of colour (b) time for colour to show (c) the amount of water (d) the kind of flower
2. 2.True or false: a magnet is not needed for the coloured flower experiment. (a) True (b) False
3. 3.⚖️ 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 amount of water
4. 4.True or false: a mirror is not needed for the coloured flower experiment. (a) True (b) False
5. 5.⚖️ 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 measure it (b) we keep it the same (c) we change it
6. 6.True or false: a sugar cube lets water climb up it. (a) False (b) True
7. 7.🔍 Which is the odd one out? (a) a sugar cube (b) a steel spoon (c) a cotton thread (d) a flower stem
8. 8.🛟 What should you do after handling food colour? (a) rub your eyes (b) wipe them on walls (c) wash your hands (d) lick your fingers
9. 9.True or false: a strip of cloth does not let water climb. (a) True (b) False
10. 10.True or false: a piece of chalk does not let water climb. (a) True (b) False
11. 11.⚖️ 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 kind of flower (b) the length of the stem (c) time for colour to show
12. 12.True or false: a balloon is not needed for the coloured flower experiment. (a) False (b) True
13. 13.💧 Which of these does not let water climb? (a) a piece of foil (b) a paper towel (c) a strip of cloth (d) a flower stem
14. 14.True or false: a glass marble lets water climb up it. (a) False (b) True
15. 15.💧 Dip a strip of cloth into coloured water. Does the water climb up it? (a) water climbs up it (b) water does not climb
16. 16.🔍 What do you see a day after a white flower stands in blue water? (a) the stem turns to ice (b) the petals turn bluish (c) the water turns green (d) the flower floats away
17. 17.🧺 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 balloon
18. 18.💧 Which of these does not let water climb? (a) a sugar cube (b) a flower stem (c) a paper towel (d) a plastic ruler
19. 19.🧺 Do we need a mirror for the coloured flower experiment? (a) needed (b) not needed
20. 20.🧺 Do we need yeast for the coloured flower experiment? (a) needed (b) not needed
21. 21.True or false: a rubber eraser lets water climb up it. (a) True (b) False
22. 22.💧 Which of these lets water climb up it? (a) a plastic ruler (b) a piece of foil (c) a glass marble (d) a sugar cube
23. 23.💧 Which of these lets water climb up it? (a) a strip of cloth (b) a plastic ruler (c) a glass marble (d) a rubber eraser
24. 24.🔮 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 all turn green (d) they turn two colours
25. 25.⚖️ 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 change it (c) we measure it
26. 26.💧 Dip a plastic ruler into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
27. 27.🧺 Which of these is not needed for the coloured flower experiment? (a) food colour (b) a white flower (c) a glass of water (d) a balloon
28. 28.🔍 Which is the odd one out? (a) a sugar cube (b) a piece of chalk (c) a glass marble (d) a paper towel
29. 29.⚖️ 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
30. 30.💧 Which of these lets water climb up it? (a) a plastic ruler (b) a piece of chalk (c) a rubber eraser (d) a piece of foil
31. 31.True or false: turmeric powder is not needed for the coloured flower experiment. (a) True (b) False
32. 32.True or false: a paper towel lets water climb up it. (a) False (b) True
33. 33.📘 What is it called when water climbs up thin tubes or paper by itself? (a) capillary action (b) melting (c) magnetism (d) evaporation
34. 34.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a glass of water (b) a few hours of waiting (c) yeast (d) a white flower
35. 35.🧺 Do we need a few hours of waiting for the coloured flower experiment? (a) needed (b) not needed
36. 36.🧺 Which of these is not needed for the coloured flower experiment? (a) a magnet (b) a white flower (c) food colour (d) a few hours of waiting
37. 37.⚖️ 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
38. 38.⚖️ 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 kind of flower (c) the length of the stem (d) the amount of water
39. 39.🧺 Do we need a glass of water for the coloured flower experiment? (a) not needed (b) needed
40. 40.🧺 Which of these is needed for the coloured flower experiment? (a) a magnet (b) a few hours of waiting (c) a mirror (d) a battery cell

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