Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 455 · 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 neutral? (a) orange juice (b) detergent water (c) soap solution (d) sugar water
2. 2.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the liquid we test (b) the colour we see (c) the number of drops
3. 3.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns blue (b) it disappears (c) it turns darker red (d) it turns yellow again
4. 4.🧺 Do we need soap solution for the turmeric test? (a) needed (b) not needed
5. 5.🟡 Turmeric paper meets lemon juice. What happens? (a) turns reddish-brown (b) stays yellow
6. 6.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the turmeric paper (b) the liquid we test (c) the light we look in (d) the colour we see
7. 7.True or false: salt water turns turmeric reddish-brown. (a) True (b) False
8. 8.⚖️ 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
9. 9.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we measure it (b) we keep it the same (c) we change it
10. 10.True or false: plain water is neutral. (a) True (b) False
11. 11.🧺 Which of these is needed for the turmeric test? (a) a balloon (b) water (c) yeast (d) a comb
12. 12.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the liquid we test (b) the light we look in (c) the colour we see (d) the turmeric paper
13. 13.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) water (c) soap solution (d) a comb
14. 14.True or false: lemon juice keeps turmeric yellow. (a) True (b) False
15. 15.True or false: soap solution is an acid. (a) True (b) False
16. 16.⚖️ 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 light we look in
17. 17.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is kept the same. (a) False (b) True
18. 18.True or false: a balloon is needed for the turmeric test. (a) True (b) False
19. 19.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) green (b) bright blue (c) reddish (d) white at once
20. 20.🔍 Which is the odd one out? (a) tamarind water (b) sugar water (c) soap solution (d) vinegar
21. 21.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is what we measure. (a) True (b) False
22. 22.🟡 Why does soap solution change turmeric’s colour? (a) soap water is a base (b) soap is an acid (c) soap is magnetic (d) soap is hot
23. 23.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is kept the same. (a) True (b) False
24. 24.🧺 Which of these is not needed for the turmeric test? (a) water (b) lemon juice (c) white paper strips (d) a mirror
25. 25.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the colour we see (b) the turmeric paper (c) the liquid we test
26. 26.🔍 Which is the odd one out? (a) soap solution (b) detergent water (c) sugar water (d) baking soda water
27. 27.True or false: detergent water is a base. (a) False (b) True
28. 28.🫧 Which of these is an acid? (a) plain water (b) vinegar (c) salt water (d) detergent water
29. 29.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns blue (b) reddish-brown (c) it turns green (d) it stays yellow
30. 30.🧺 Do we need a magnet for the turmeric test? (a) needed (b) not needed
31. 31.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) soap solution (c) white paper strips (d) a balloon
32. 32.🟡 Which of these turns turmeric reddish-brown? (a) salt water (b) plain water (c) detergent water (d) sugar water
33. 33.🛟 Turmeric stains clothes. What should you wear? (a) your school uniform (b) a white party dress (c) your best clothes (d) an old shirt or apron
34. 34.True or false: tamarind water is an acid. (a) False (b) True
35. 35.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it stays yellow (b) it turns black (c) it turns red (d) it turns blue
36. 36.True or false: a battery cell is needed for the turmeric test. (a) True (b) False
37. 37.🫧 Which of these is a base? (a) soap solution (b) orange juice (c) sugar water (d) tamarind water
38. 38.🫧 Is soap solution an acid, a base or neutral? (a) an acid (b) a base (c) neutral
39. 39.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) bright blue (b) it stays white (c) reddish-brown (d) green
40. 40.🛟 Which rule keeps the turmeric test safe? (a) sip each liquid (b) mix bathroom cleaners (c) use only kitchen items (d) sniff each bottle hard

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