Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 470 · 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.🫧 Which of these is a base? (a) tamarind water (b) sugar water (c) orange juice (d) detergent water
2. 2.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it stays yellow (b) it turns blue (c) it turns red (d) it turns black
3. 3.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) reddish (b) green (c) bright blue (d) white at once
4. 4.True or false: a balloon is not needed for the turmeric test. (a) False (b) True
5. 5.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it disappears (b) it turns yellow again (c) it turns blue (d) it turns darker red
6. 6.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is the one thing we change. (a) True (b) False
7. 7.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the turmeric paper (b) the colour we see (c) the liquid we test
8. 8.🟡 Turmeric paper meets soap solution. What happens? (a) stays yellow (b) turns reddish-brown
9. 9.⚖️ 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 measure it (c) we keep it the same
10. 10.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) lemon juice (c) a magnet (d) turmeric powder
11. 11.⚖️ 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 liquid we test (d) the turmeric paper
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.🫧 Which of these is neutral? (a) orange juice (b) baking soda water (c) lemon juice (d) salt water
14. 14.🧺 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) a mirror
15. 15.True or false: vinegar is an acid. (a) False (b) True
16. 16.True or false: salt water turns turmeric reddish-brown. (a) False (b) True
17. 17.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the light we look in (b) the colour we see (c) the number of drops (d) the turmeric paper
18. 18.🟡 Turmeric paper meets sugar water. What happens? (a) turns reddish-brown (b) stays yellow
19. 19.🧺 Which of these is needed for the turmeric test? (a) lemon juice (b) a mirror (c) a comb (d) a balloon
20. 20.🛟 Which rule keeps the turmeric test safe? (a) use only kitchen items (b) sip each liquid (c) sniff each bottle hard (d) mix bathroom cleaners
21. 21.🟡 Turmeric paper meets plain water. What happens? (a) turns reddish-brown (b) stays yellow
22. 22.🧺 Do we need water for the turmeric test? (a) not needed (b) needed
23. 23.True or false: soap solution is needed for the turmeric test. (a) False (b) True
24. 24.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is kept the same. (a) True (b) False
25. 25.🧺 Do we need white paper strips for the turmeric test? (a) needed (b) not needed
26. 26.🫧 Which of these is a base? (a) curd (b) baking soda water (c) vinegar (d) tamarind water
27. 27.🟡 Which of these turns turmeric reddish-brown? (a) tamarind water (b) sugar water (c) lemon juice (d) soap solution
28. 28.True or false: salt water is an acid. (a) True (b) False
29. 29.🛟 Turmeric stains clothes. What should you wear? (a) an old shirt or apron (b) your best clothes (c) your school uniform (d) a white party dress
30. 30.🧺 Which of these is needed for the turmeric test? (a) a comb (b) a battery cell (c) a magnet (d) white paper strips
31. 31.🫧 Is plain water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
32. 32.🫧 Is orange juice an acid, a base or neutral? (a) an acid (b) a base (c) neutral
33. 33.🫧 Which of these is an acid? (a) detergent water (b) sugar water (c) salt water (d) lemon juice
34. 34.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is kept the same. (a) False (b) True
35. 35.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we measure it (b) we change it (c) we keep it the same
36. 36.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the colour we see (b) the liquid we test (c) the number of drops
37. 37.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) baking soda water (c) detergent water (d) plain water
38. 38.🧺 Which of these is needed for the turmeric test? (a) a dropper or spoon (b) a balloon (c) a magnet (d) yeast
39. 39.🧺 Do we need a balloon for the turmeric test? (a) not needed (b) needed
40. 40.🟡 Which of these keeps turmeric yellow? (a) vinegar (b) detergent water (c) baking soda water (d) soap solution

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