Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 890 · 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.🫧 Is salt water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
2. 2.🟡 Which of these turns turmeric reddish-brown? (a) tamarind water (b) lemon juice (c) soap solution (d) salt water
3. 3.🟡 Which of these turns turmeric reddish-brown? (a) tamarind water (b) sugar water (c) detergent water (d) salt water
4. 4.🟡 Which of these keeps turmeric yellow? (a) detergent water (b) baking soda water (c) soap solution (d) salt water
5. 5.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the colour we see (b) the liquid we test (c) the light we look in (d) the turmeric paper
6. 6.⚖️ 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 liquid we test
7. 7.📘 What do we call something that changes colour to show an acid or a base? (a) a prism (b) a magnet (c) an indicator (d) a pulley
8. 8.🧺 Which of these is needed for the turmeric test? (a) yeast (b) a dropper or spoon (c) a comb (d) a balloon
9. 9.🧺 Do we need turmeric powder for the turmeric test? (a) not needed (b) needed
10. 10.🔍 Which is the odd one out? (a) soap solution (b) detergent water (c) sugar water (d) baking soda water
11. 11.True or false: vinegar turns turmeric reddish-brown. (a) True (b) False
12. 12.True or false: soap solution is needed for the turmeric test. (a) False (b) True
13. 13.True or false: baking soda water keeps turmeric yellow. (a) False (b) True
14. 14.🛟 Which rule keeps the turmeric test safe? (a) sniff each bottle hard (b) use only kitchen items (c) sip each liquid (d) mix bathroom cleaners
15. 15.🟡 Which of these turns turmeric paper reddish-brown? (a) sugar water (b) soap solution (c) lemon juice (d) vinegar
16. 16.🫧 Is lemon juice an acid, a base or neutral? (a) a base (b) an acid (c) neutral
17. 17.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it turns black (b) it stays yellow (c) it turns blue (d) it turns red
18. 18.True or false: a mirror is needed for the turmeric test. (a) True (b) False
19. 19.🛟 Turmeric stains clothes. What should you wear? (a) your best clothes (b) a white party dress (c) an old shirt or apron (d) your school uniform
20. 20.🟡 Turmeric paper meets plain water. What happens? (a) turns reddish-brown (b) stays yellow
21. 21.🟡 Which of these turns turmeric reddish-brown? (a) plain water (b) sugar water (c) lemon juice (d) baking soda water
22. 22.🫧 Is soap solution an acid, a base or neutral? (a) a base (b) neutral (c) an acid
23. 23.True or false: salt water is neutral. (a) True (b) False
24. 24.🫧 Is tamarind water an acid, a base or neutral? (a) neutral (b) an acid (c) a base
25. 25.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we change it (b) we measure it (c) we keep it the same
26. 26.🫧 Which of these is an acid? (a) plain water (b) soap solution (c) sugar water (d) curd
27. 27.🧺 Which of these is needed for the turmeric test? (a) yeast (b) water (c) a magnet (d) a balloon
28. 28.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it disappears (b) it turns blue (c) it turns darker red (d) it turns yellow again
29. 29.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) white paper strips (b) lemon juice (c) turmeric powder (d) a magnet
30. 30.🟡 Why does soap solution change turmeric’s colour? (a) soap water is a base (b) soap is hot (c) soap is an acid (d) soap is magnetic
31. 31.🧺 Do we need a dropper or spoon for the turmeric test? (a) not needed (b) needed
32. 32.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns black (b) it stays yellow (c) it turns blue (d) it turns red
33. 33.🧺 Which of these is not needed for the turmeric test? (a) white paper strips (b) a dropper or spoon (c) soap solution (d) yeast
34. 34.🟡 Turmeric paper meets soap solution. What happens? (a) stays yellow (b) turns reddish-brown
35. 35.🔍 Which is the odd one out? (a) soap solution (b) lemon juice (c) detergent water (d) baking soda water
36. 36.🔍 Which is the odd one out? (a) lemon juice (b) soap solution (c) salt water (d) tamarind water
37. 37.🧺 Do we need a mirror for the turmeric test? (a) needed (b) not needed
38. 38.🟡 Turmeric paper meets sugar water. What happens? (a) turns reddish-brown (b) stays yellow
39. 39.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) white at once (b) reddish (c) bright blue (d) green
40. 40.⚖️ 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 light we look in

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