Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 290 · 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) detergent water (b) tamarind water (c) plain water (d) baking soda water
2. 2.🛟 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
3. 3.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we keep it the same (b) we change it (c) we measure it
4. 4.🟡 Which of these keeps turmeric yellow? (a) lemon juice (b) detergent water (c) soap solution (d) baking soda water
5. 5.🫧 Is vinegar an acid, a base or neutral? (a) neutral (b) an acid (c) a base
6. 6.🫧 Is sugar water an acid, a base or neutral? (a) a base (b) an acid (c) neutral
7. 7.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) bright blue (b) reddish (c) green (d) white at once
8. 8.🧺 Which of these is needed for the turmeric test? (a) a magnet (b) a battery cell (c) a mirror (d) lemon juice
9. 9.🫧 Is soap solution an acid, a base or neutral? (a) neutral (b) an acid (c) a base
10. 10.🫧 Which of these is neutral? (a) tamarind water (b) orange juice (c) vinegar (d) sugar water
11. 11.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the number of drops (b) the colour we see (c) the light we look in (d) the liquid we test
12. 12.🟡 Turmeric paper meets vinegar. What happens? (a) turns reddish-brown (b) stays yellow
13. 13.True or false: soap solution is not needed for the turmeric test. (a) True (b) False
14. 14.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is what we measure. (a) False (b) True
15. 15.🧺 Do we need turmeric powder for the turmeric test? (a) not needed (b) needed
16. 16.📘 What do we call something that changes colour to show an acid or a base? (a) an indicator (b) a pulley (c) a magnet (d) a prism
17. 17.🧺 Do we need a balloon for the turmeric test? (a) needed (b) not needed
18. 18.🟡 Turmeric paper meets detergent water. What happens? (a) stays yellow (b) turns reddish-brown
19. 19.🧺 Do we need a dropper or spoon for the turmeric test? (a) not needed (b) needed
20. 20.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the light we look in (b) the colour we see (c) the liquid we test
21. 21.True or false: plain water keeps turmeric yellow. (a) False (b) True
22. 22.True or false: vinegar is neutral. (a) False (b) True
23. 23.True or false: detergent water is a base. (a) True (b) False
24. 24.🟡 Turmeric paper meets sugar water. What happens? (a) stays yellow (b) turns reddish-brown
25. 25.True or false: a magnet is needed for the turmeric test. (a) True (b) False
26. 26.🟡 Turmeric paper meets baking soda water. What happens? (a) turns reddish-brown (b) stays yellow
27. 27.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns green (b) it turns blue (c) it stays yellow (d) reddish-brown
28. 28.🛟 Turmeric stains clothes. What should you wear? (a) your best clothes (b) an old shirt or apron (c) your school uniform (d) a white party dress
29. 29.🔍 Which is the odd one out? (a) plain water (b) baking soda water (c) soap solution (d) detergent water
30. 30.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) lemon juice (c) a dropper or spoon (d) a balloon
31. 31.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) white paper strips (c) a battery cell (d) water
32. 32.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the light we look in”? (a) we measure it (b) we change it (c) we keep it the same
33. 33.🧺 Do we need soap solution for the turmeric test? (a) needed (b) not needed
34. 34.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we change it (b) we keep it the same (c) we measure it
35. 35.True or false: salt water keeps turmeric yellow. (a) True (b) False
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 number of drops (c) the liquid we test
37. 37.True or false: lemon juice is not needed for the turmeric test. (a) False (b) True
38. 38.True or false: vinegar keeps turmeric yellow. (a) False (b) True
39. 39.🧺 Which of these is not needed for the turmeric test? (a) a balloon (b) soap solution (c) white paper strips (d) a dropper or spoon
40. 40.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) lemon juice (c) soap solution (d) yeast

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