Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 360 · 40 questions

What you do (Yellow or red?): 1. Mix turmeric powder with a little water into a paste and paint it on white paper strips; let them dry. 2. Put a drop of soap solution on one strip and a drop of lemon juice on another. 3. Write down the colour each drop makes. 4. Add lemon juice to the reddish spot and watch it change back.

1. 1.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) white at once (b) reddish (c) green (d) bright blue
2. 2.🛟 Turmeric stains clothes. What should you wear? (a) an old shirt or apron (b) your best clothes (c) a white party dress (d) your school uniform
3. 3.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we keep it the same (b) we change it (c) we measure it
4. 4.True or false: a dropper or spoon is not needed for the turmeric test. (a) False (b) True
5. 5.🧺 Do we need a dropper or spoon for the turmeric test? (a) not needed (b) needed
6. 6.True or false: baking soda water keeps turmeric yellow. (a) True (b) False
7. 7.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) reddish-brown (b) it stays yellow (c) it turns green (d) it turns blue
8. 8.🔍 Which is the odd one out? (a) lemon juice (b) sugar water (c) vinegar (d) baking soda water
9. 9.True or false: a dropper or spoon is needed for the turmeric test. (a) False (b) True
10. 10.True or false: baking soda water is a base. (a) False (b) True
11. 11.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) soap solution (c) a comb (d) lemon juice
12. 12.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we change it (b) we keep it the same (c) we measure it
13. 13.🟡 Turmeric paper meets sugar water. What happens? (a) stays yellow (b) turns reddish-brown
14. 14.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is the one thing we change. (a) False (b) True
15. 15.True or false: salt water is a base. (a) True (b) False
16. 16.🫧 Which of these is a base? (a) curd (b) baking soda water (c) plain water (d) vinegar
17. 17.🟡 Turmeric paper meets detergent water. What happens? (a) turns reddish-brown (b) stays yellow
18. 18.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the light we look in”? (a) we change it (b) we keep it the same (c) we measure it
19. 19.🧺 Do we need a balloon for the turmeric test? (a) not needed (b) needed
20. 20.🟡 Which of these turns turmeric paper reddish-brown? (a) vinegar (b) lemon juice (c) sugar water (d) soap solution
21. 21.🫧 Which of these is a base? (a) curd (b) tamarind water (c) vinegar (d) soap solution
22. 22.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a battery cell (b) water (c) lemon juice (d) white paper strips
23. 23.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is what we measure. (a) False (b) True
24. 24.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) bright blue (b) it stays white (c) green (d) reddish-brown
25. 25.🧺 Which of these is not needed for the turmeric test? (a) white paper strips (b) lemon juice (c) yeast (d) a dropper or spoon
26. 26.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) a balloon (c) water (d) soap solution
27. 27.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is what we measure. (a) True (b) False
28. 28.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we keep it the same (b) we measure it (c) we change it
29. 29.🔍 Which is the odd one out? (a) lemon juice (b) detergent water (c) vinegar (d) tamarind water
30. 30.🫧 Is detergent water an acid, a base or neutral? (a) a base (b) an acid (c) neutral
31. 31.🛟 Which rule keeps the turmeric test safe? (a) sip each liquid (b) sniff each bottle hard (c) mix bathroom cleaners (d) use only kitchen items
32. 32.🟡 Turmeric paper meets soap solution. What happens? (a) stays yellow (b) turns reddish-brown
33. 33.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it disappears (b) it turns yellow again (c) it turns darker red (d) it turns blue
34. 34.📘 What do we call something that changes colour to show an acid or a base? (a) an indicator (b) a magnet (c) a prism (d) a pulley
35. 35.🧺 Which of these is needed for the turmeric test? (a) a battery cell (b) a mirror (c) a magnet (d) lemon juice
36. 36.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) water (c) white paper strips (d) yeast
37. 37.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is what we measure. (a) True (b) False
38. 38.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the light we look in (b) the colour we see (c) the turmeric paper (d) the liquid we test
39. 39.🟡 Which of these turns turmeric reddish-brown? (a) vinegar (b) plain water (c) baking soda water (d) lemon juice
40. 40.True or false: soap solution turns turmeric reddish-brown. (a) True (b) False

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