Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 371 · 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: a battery cell is needed for the turmeric test. (a) True (b) False
2. 2.🧺 Which of these is needed for the turmeric test? (a) white paper strips (b) a battery cell (c) yeast (d) a comb
3. 3.🫧 Is plain water an acid, a base or neutral? (a) neutral (b) a base (c) an acid
4. 4.True or false: lemon juice is neutral. (a) False (b) True
5. 5.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is kept the same. (a) True (b) False
6. 6.🔍 Which is the odd one out? (a) tamarind water (b) vinegar (c) detergent water (d) lemon juice
7. 7.True or false: baking soda water keeps turmeric yellow. (a) True (b) False
8. 8.🟡 Which of these turns turmeric reddish-brown? (a) detergent water (b) sugar water (c) salt water (d) lemon juice
9. 9.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns darker red (b) it disappears (c) it turns blue (d) it turns yellow again
10. 10.🫧 Is baking soda water an acid, a base or neutral? (a) an acid (b) neutral (c) a base
11. 11.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is what we measure. (a) False (b) True
12. 12.🫧 Is lemon juice an acid, a base or neutral? (a) a base (b) neutral (c) an acid
13. 13.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) lemon juice (c) soap solution (d) a comb
14. 14.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a battery cell (b) white paper strips (c) turmeric powder (d) soap solution
15. 15.🔍 Which is the odd one out? (a) soap solution (b) baking soda water (c) vinegar (d) detergent water
16. 16.⚖️ 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
17. 17.🧺 Do we need soap solution for the turmeric test? (a) needed (b) not needed
18. 18.🟡 Turmeric paper meets sugar water. What happens? (a) turns reddish-brown (b) stays yellow
19. 19.🧺 Do we need yeast for the turmeric test? (a) not needed (b) needed
20. 20.🔮 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
21. 21.🛟 Which rule keeps the turmeric test safe? (a) mix bathroom cleaners (b) use only kitchen items (c) sip each liquid (d) sniff each bottle hard
22. 22.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is kept the same. (a) False (b) True
23. 23.🔍 Which is the odd one out? (a) plain water (b) vinegar (c) lemon juice (d) soap solution
24. 24.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) white paper strips (c) a dropper or spoon (d) yeast
25. 25.⚖️ 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
26. 26.True or false: soap solution turns turmeric reddish-brown. (a) False (b) True
27. 27.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) turmeric powder (c) a balloon (d) water
28. 28.📘 What do we call something that changes colour to show an acid or a base? (a) a magnet (b) an indicator (c) a prism (d) a pulley
29. 29.🛟 Turmeric stains clothes. What should you wear? (a) your school uniform (b) a white party dress (c) an old shirt or apron (d) your best clothes
30. 30.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we keep it the same (b) we measure it (c) we change it
31. 31.🧺 Which of these is not needed for the turmeric test? (a) a magnet (b) turmeric powder (c) a dropper or spoon (d) soap solution
32. 32.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we change it (b) we keep it the same (c) we measure it
33. 33.🫧 Which of these is a base? (a) soap solution (b) sugar water (c) lemon juice (d) orange juice
34. 34.True or false: a balloon is needed for the turmeric test. (a) True (b) False
35. 35.🟡 Turmeric paper meets plain water. What happens? (a) turns reddish-brown (b) stays yellow
36. 36.🧺 Which of these is needed for the turmeric test? (a) a comb (b) lemon juice (c) a balloon (d) yeast
37. 37.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the light we look in (b) the liquid we test (c) the colour we see
38. 38.True or false: vinegar is neutral. (a) True (b) False
39. 39.True or false: salt water is an acid. (a) True (b) False
40. 40.🧺 Do we need water for the turmeric test? (a) not needed (b) needed

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