Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 419 · 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.🟡 Turmeric paper meets soap solution. What happens? (a) turns reddish-brown (b) stays yellow
2. 2.🫧 Is detergent water an acid, a base or neutral? (a) neutral (b) an acid (c) a base
3. 3.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is what we measure. (a) True (b) False
4. 4.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) green (b) reddish (c) white at once (d) bright blue
5. 5.🫧 Which of these is an acid? (a) sugar water (b) lemon juice (c) plain water (d) detergent water
6. 6.True or false: sugar water is neutral. (a) False (b) True
7. 7.⚖️ 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 number of drops (c) the liquid we test (d) the turmeric paper
8. 8.📘 What do we call something that changes colour to show an acid or a base? (a) a pulley (b) a prism (c) an indicator (d) a magnet
9. 9.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the colour we see (b) the turmeric paper (c) the liquid we test (d) the number of drops
10. 10.True or false: salt water is an acid. (a) True (b) False
11. 11.True or false: sugar water is an acid. (a) False (b) True
12. 12.🧺 Which of these is needed for the turmeric test? (a) water (b) a mirror (c) a magnet (d) a balloon
13. 13.True or false: plain water is neutral. (a) False (b) True
14. 14.🛟 Which rule keeps the turmeric test safe? (a) mix bathroom cleaners (b) sip each liquid (c) sniff each bottle hard (d) use only kitchen items
15. 15.🧺 Which of these is needed for the turmeric test? (a) a battery cell (b) yeast (c) a dropper or spoon (d) a magnet
16. 16.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is kept the same. (a) False (b) True
17. 17.True or false: vinegar keeps turmeric yellow. (a) False (b) True
18. 18.True or false: salt water keeps turmeric yellow. (a) True (b) False
19. 19.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns blue (b) it turns red (c) it turns black (d) it stays yellow
20. 20.🫧 Is baking soda water an acid, a base or neutral? (a) a base (b) an acid (c) neutral
21. 21.🧺 Which of these is not needed for the turmeric test? (a) turmeric powder (b) a balloon (c) a dropper or spoon (d) soap solution
22. 22.🫧 Which of these is a base? (a) plain water (b) soap solution (c) tamarind water (d) sugar water
23. 23.🔮 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
24. 24.⚖️ 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
25. 25.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns darker red (b) it disappears (c) it turns yellow again (d) it turns blue
26. 26.🟡 Turmeric paper meets tamarind water. What happens? (a) stays yellow (b) turns reddish-brown
27. 27.🟡 Which of these turns turmeric paper reddish-brown? (a) sugar water (b) lemon juice (c) soap solution (d) vinegar
28. 28.True or false: yeast is not needed for the turmeric test. (a) False (b) True
29. 29.🧺 Do we need white paper strips for the turmeric test? (a) not needed (b) needed
30. 30.🫧 Is plain water an acid, a base or neutral? (a) neutral (b) an acid (c) a base
31. 31.🫧 Which of these is an acid? (a) detergent water (b) soap solution (c) salt water (d) curd
32. 32.True or false: water is needed for the turmeric test. (a) True (b) False
33. 33.🫧 Is sugar water an acid, a base or neutral? (a) neutral (b) an acid (c) a base
34. 34.True or false: salt water turns turmeric reddish-brown. (a) True (b) False
35. 35.🫧 Which of these is an acid? (a) soap solution (b) detergent water (c) plain water (d) tamarind water
36. 36.🟡 Which of these turns turmeric reddish-brown? (a) plain water (b) soap solution (c) vinegar (d) sugar water
37. 37.🫧 Is salt water an acid, a base or neutral? (a) neutral (b) an acid (c) a base
38. 38.🔍 Which is the odd one out? (a) detergent water (b) soap solution (c) tamarind water (d) baking soda water
39. 39.🟡 Turmeric paper meets vinegar. What happens? (a) turns reddish-brown (b) stays yellow
40. 40.⚖️ 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

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