Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 911 · 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 turns turmeric reddish-brown? (a) soap solution (b) tamarind water (c) vinegar (d) salt water
2. 2.🫧 Which of these is a base? (a) tamarind water (b) sugar water (c) lemon juice (d) detergent water
3. 3.True or false: detergent water is a base. (a) False (b) True
4. 4.🫧 Is curd an acid, a base or neutral? (a) a base (b) an acid (c) neutral
5. 5.🔮 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
6. 6.True or false: tamarind water is neutral. (a) False (b) True
7. 7.🫧 Which of these is neutral? (a) detergent water (b) curd (c) baking soda water (d) salt water
8. 8.True or false: detergent water turns turmeric reddish-brown. (a) False (b) True
9. 9.⚖️ 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
10. 10.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the liquid we test (b) the turmeric paper (c) the light we look in (d) the number of drops
11. 11.🧺 Do we need a mirror for the turmeric test? (a) not needed (b) needed
12. 12.🧺 Which of these is needed for the turmeric test? (a) a balloon (b) a mirror (c) a comb (d) turmeric powder
13. 13.🟡 Turmeric paper meets soap solution. What happens? (a) stays yellow (b) turns reddish-brown
14. 14.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is kept the same. (a) False (b) True
15. 15.🫧 Which of these is a base? (a) tamarind water (b) lemon juice (c) curd (d) soap solution
16. 16.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is kept the same. (a) False (b) True
17. 17.🟡 Why does soap solution change turmeric’s colour? (a) soap is an acid (b) soap water is a base (c) soap is hot (d) soap is magnetic
18. 18.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) white paper strips (b) water (c) lemon juice (d) a magnet
19. 19.True or false: turmeric powder is not needed for the turmeric test. (a) False (b) True
20. 20.📘 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
21. 21.🧺 Do we need a battery cell for the turmeric test? (a) not needed (b) needed
22. 22.🧺 Which of these is not needed for the turmeric test? (a) water (b) soap solution (c) a battery cell (d) white paper strips
23. 23.True or false: a magnet is needed for the turmeric test. (a) False (b) True
24. 24.🧺 Do we need turmeric powder for the turmeric test? (a) not needed (b) needed
25. 25.🔍 Which is the odd one out? (a) lemon juice (b) salt water (c) soap solution (d) plain water
26. 26.⚖️ 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
27. 27.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) bright blue (b) reddish-brown (c) green (d) it stays white
28. 28.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is the one thing we change. (a) False (b) True
29. 29.🫧 Which of these is neutral? (a) soap solution (b) detergent water (c) sugar water (d) baking soda water
30. 30.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we change it (b) we keep it the same (c) we measure it
31. 31.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns red (b) it turns blue (c) it turns black (d) it stays yellow
32. 32.True or false: salt water turns turmeric reddish-brown. (a) False (b) True
33. 33.🔍 Which is the odd one out? (a) sugar water (b) plain water (c) lemon juice (d) baking soda water
34. 34.🫧 Which of these is an acid? (a) baking soda water (b) detergent water (c) curd (d) sugar water
35. 35.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is the one thing we change. (a) True (b) False
36. 36.🛟 Which rule keeps the turmeric test safe? (a) sniff each bottle hard (b) mix bathroom cleaners (c) use only kitchen items (d) sip each liquid
37. 37.🫧 Is orange juice an acid, a base or neutral? (a) an acid (b) neutral (c) a base
38. 38.🧺 Which of these is not needed for the turmeric test? (a) a dropper or spoon (b) a mirror (c) water (d) turmeric powder
39. 39.🧺 Which of these is not needed for the turmeric test? (a) white paper strips (b) a magnet (c) a dropper or spoon (d) soap solution
40. 40.🔍 Which is the odd one out? (a) detergent water (b) soap solution (c) sugar water (d) baking soda water

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