Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 619 · 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 an acid? (a) salt water (b) baking soda water (c) soap solution (d) tamarind water
2. 2.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the number of drops (b) the turmeric paper (c) the liquid we test (d) the light we look in
3. 3.True or false: curd is an acid. (a) False (b) True
4. 4.📘 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
5. 5.🟡 Which of these turns turmeric reddish-brown? (a) sugar water (b) vinegar (c) tamarind water (d) detergent water
6. 6.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a balloon (b) turmeric powder (c) white paper strips (d) soap solution
7. 7.True or false: detergent water keeps turmeric yellow. (a) False (b) True
8. 8.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we change it (b) we measure it (c) we keep it the same
9. 9.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns blue (b) it disappears (c) it turns yellow again (d) it turns darker red
10. 10.True or false: lemon juice is a base. (a) False (b) True
11. 11.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns red (b) it stays yellow (c) it turns blue (d) it turns black
12. 12.🫧 Which of these is an acid? (a) baking soda water (b) sugar water (c) vinegar (d) soap solution
13. 13.🔍 Which is the odd one out? (a) soap solution (b) tamarind water (c) detergent water (d) baking soda water
14. 14.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) white at once (b) bright blue (c) green (d) reddish
15. 15.🫧 Is lemon juice an acid, a base or neutral? (a) an acid (b) neutral (c) a base
16. 16.🫧 Is soap solution an acid, a base or neutral? (a) neutral (b) an acid (c) a base
17. 17.⚖️ 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 keep it the same (c) we change it
18. 18.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the colour we see (b) the liquid we test (c) the light we look in
19. 19.🔍 Which is the odd one out? (a) salt water (b) lemon juice (c) plain water (d) soap solution
20. 20.🧺 Which of these is not needed for the turmeric test? (a) lemon juice (b) white paper strips (c) a balloon (d) turmeric powder
21. 21.🫧 Which of these is a base? (a) orange juice (b) sugar water (c) soap solution (d) plain water
22. 22.True or false: a magnet is needed for the turmeric test. (a) False (b) True
23. 23.🧺 Which of these is not needed for the turmeric test? (a) turmeric powder (b) a mirror (c) white paper strips (d) water
24. 24.⚖️ 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 turmeric paper (d) the liquid we test
25. 25.🟡 Which of these keeps turmeric yellow? (a) detergent water (b) soap solution (c) sugar water (d) baking soda water
26. 26.🧺 Which of these is needed for the turmeric test? (a) a magnet (b) yeast (c) white paper strips (d) a balloon
27. 27.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is kept the same. (a) False (b) True
28. 28.🧺 Which of these is needed for the turmeric test? (a) a mirror (b) a balloon (c) turmeric powder (d) a battery cell
29. 29.🫧 Which of these is neutral? (a) soap solution (b) plain water (c) lemon juice (d) baking soda water
30. 30.True or false: salt water is neutral. (a) False (b) True
31. 31.🛟 Which rule keeps the turmeric test safe? (a) mix bathroom cleaners (b) sniff each bottle hard (c) sip each liquid (d) use only kitchen items
32. 32.🧺 Do we need lemon juice for the turmeric test? (a) needed (b) not needed
33. 33.🧺 Do we need a comb for the turmeric test? (a) needed (b) not needed
34. 34.True or false: baking soda water is neutral. (a) True (b) False
35. 35.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) green (b) reddish-brown (c) it stays white (d) bright blue
36. 36.True or false: orange juice is an acid. (a) True (b) False
37. 37.🫧 Is sugar water an acid, a base or neutral? (a) a base (b) an acid (c) neutral
38. 38.⚖️ 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
39. 39.🧺 Do we need a battery cell for the turmeric test? (a) needed (b) not needed
40. 40.🔮 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

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