Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 613 · 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.True or false: soap solution is a base. (a) True (b) False
2. 2.🟡 Why does soap solution change turmeric’s colour? (a) soap is hot (b) soap is magnetic (c) soap is an acid (d) soap water is a base
3. 3.🧺 Which of these is not needed for the turmeric test? (a) white paper strips (b) lemon juice (c) soap solution (d) a magnet
4. 4.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns blue (b) it stays yellow (c) it turns green (d) reddish-brown
5. 5.⚖️ 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
6. 6.⚖️ 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 change it (c) we measure it
7. 7.🛟 Turmeric stains clothes. What should you wear? (a) your best clothes (b) an old shirt or apron (c) a white party dress (d) your school uniform
8. 8.🔍 Which is the odd one out? (a) soap solution (b) detergent water (c) lemon juice (d) baking soda water
9. 9.True or false: a magnet is needed for the turmeric test. (a) False (b) True
10. 10.🧺 Do we need a comb for the turmeric test? (a) needed (b) not needed
11. 11.True or false: lemon juice is neutral. (a) False (b) True
12. 12.True or false: soap solution is not needed for the turmeric test. (a) True (b) False
13. 13.True or false: baking soda water turns turmeric reddish-brown. (a) False (b) True
14. 14.🧺 Do we need water for the turmeric test? (a) not needed (b) needed
15. 15.🫧 Is tamarind water an acid, a base or neutral? (a) an acid (b) neutral (c) a base
16. 16.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns red (b) it stays yellow (c) it turns black (d) it turns blue
17. 17.True or false: yeast is needed for the turmeric test. (a) True (b) False
18. 18.True or false: vinegar turns turmeric reddish-brown. (a) True (b) False
19. 19.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a magnet (b) turmeric powder (c) a dropper or spoon (d) water
20. 20.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) green (b) it stays white (c) reddish-brown (d) bright blue
21. 21.⚖️ 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
22. 22.🍋 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
23. 23.🟡 Which of these turns turmeric reddish-brown? (a) plain water (b) detergent water (c) salt water (d) sugar water
24. 24.🟡 Which of these turns turmeric reddish-brown? (a) tamarind water (b) baking soda water (c) salt water (d) lemon juice
25. 25.🛟 Which rule keeps the turmeric test safe? (a) use only kitchen items (b) mix bathroom cleaners (c) sip each liquid (d) sniff each bottle hard
26. 26.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is kept the same. (a) True (b) False
27. 27.🫧 Is orange juice an acid, a base or neutral? (a) neutral (b) a base (c) an acid
28. 28.🔍 Which is the odd one out? (a) plain water (b) vinegar (c) detergent water (d) sugar water
29. 29.🧺 Do we need turmeric powder for the turmeric test? (a) needed (b) not needed
30. 30.🟡 Which of these turns turmeric reddish-brown? (a) salt water (b) vinegar (c) sugar water (d) soap solution
31. 31.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) green (b) white at once (c) reddish (d) bright blue
32. 32.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is the one thing we change. (a) True (b) False
33. 33.True or false: a mirror is not needed for the turmeric test. (a) False (b) True
34. 34.🧺 Do we need a magnet for the turmeric test? (a) needed (b) not needed
35. 35.📘 What do we call something that changes colour to show an acid or a base? (a) a prism (b) a pulley (c) a magnet (d) an indicator
36. 36.True or false: lemon juice turns turmeric reddish-brown. (a) False (b) True
37. 37.⚖️ 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
38. 38.🫧 Which of these is an acid? (a) sugar water (b) salt water (c) vinegar (d) baking soda water
39. 39.🧺 Do we need white paper strips for the turmeric test? (a) not needed (b) needed
40. 40.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is kept the same. (a) False (b) True

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