Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 535 · 40 questions

What you do (Find the experiment, use the idea): 1. Read the question and find its experiment. 2. Use that experiment’s idea — acid and base, indicator colours, chemical change, what seeds and yeast need, transpiration, crystals or filtering. 3. For a fair-test question, find what is changed, kept the same and measured. 4. For a safety question, choose what keeps everyone safe.

1. 1.🍋 Why does the lemon writing turn brown with heat? (a) the iron is brown (b) heat adds colour (c) the juice scorches first (d) paper turns lemony
2. 2.🛟 Turmeric stains clothes. What should you wear? (a) your school uniform (b) an old shirt or apron (c) a white party dress (d) your best clothes
3. 3.🔍 Which is the odd one out? (a) air (b) warmth (c) salt (d) water
4. 4.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns blue (b) it turns black (c) it turns red (d) it stays yellow
5. 5.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed
6. 6.🍞 Does yeast need vinegar to make gas? (a) yeast needs it (b) yeast does not need it
7. 7.🧺 Which of these is needed for the muddy water filter? (a) a magnet (b) a battery cell (c) a mirror (d) muddy water
8. 8.🫧 Which of these is neutral? (a) lemon juice (b) curd (c) salt water (d) orange juice
9. 9.🫗 How do we separate salt from sea water? (a) filtering (b) evaporating (c) sieving (d) handpicking
10. 10.🔍 Which is the odd one out? (a) water (b) warmth (c) soil (d) air
11. 11.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) cold water to rinse (b) a magnet (c) a jar with a tight lid (d) a timer
12. 12.🛟 Which rule keeps the turmeric test safe? (a) sip each liquid (b) use only kitchen items (c) sniff each bottle hard (d) mix bathroom cleaners
13. 13.🧺 Do we need a potted plant for the leafy bag test? (a) needed (b) not needed
14. 14.🧺 Which of these is needed for the secret lemon message? (a) a magnet (b) a battery cell (c) yeast (d) lemon juice
15. 15.🔮 Predict: you use more vinegar and more baking soda. What happens to the balloon? (a) it shrinks (b) it turns blue (c) it grows bigger (d) there is no change
16. 16.🔍 Which is the odd one out? (a) ironing the paper (b) putting the iron away (c) cutting the lemon (d) writing the message
17. 17.🔍 Which is the odd one out? (a) plain water (b) tamarind water (c) salt water (d) sugar water
18. 18.🫧 Is detergent water an acid, a base or neutral? (a) neutral (b) an acid (c) a base
19. 19.True or false: salt water is a base. (a) True (b) False
20. 20.True or false: a comb is needed for the turmeric test. (a) True (b) False
21. 21.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the amount of sugar”? (a) we change it (b) we keep it the same (c) we measure it
22. 22.🌱 Why do the seeds on dry cotton not sprout? (a) they have no salt (b) they have no water (c) they have no soil (d) they are too wet
23. 23.📘 What do we call a solution that cannot dissolve any more salt? (a) magnetic (b) empty (c) saturated (d) frozen
24. 24.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) reddish-brown (b) it turns blue (c) it turns green (d) it stays yellow
25. 25.True or false: warm water is not needed for the yeast balloon. (a) True (b) False
26. 26.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) on the edge of a table (c) safe from small children (d) next to the baby
27. 27.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the colour we see (b) the liquid we test (c) the light we look in (d) the turmeric paper
28. 28.🫧 Is baking soda water an acid, a base or neutral? (a) an acid (b) neutral (c) a base
29. 29.🔍 Which is the odd one out? (a) orange juice (b) sugar water (c) plain water (d) salt water
30. 30.🔍 Which is the odd one out? (a) sand (b) chalk powder (c) sawdust (d) baking soda
31. 31.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the kind of juice”? (a) we keep it the same (b) we measure it (c) we change it
32. 32.True or false: warm water is something yeast does not need. (a) True (b) False
33. 33.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is the one thing we change? (a) the kind of balloon (b) the same bottle (c) spoons of baking soda (d) the amount of vinegar
34. 34.True or false: a funnel is not needed for the muddy water filter. (a) False (b) True
35. 35.True or false: gravel from fine sand is done by sieving. (a) True (b) False
36. 36.🧺 Which of these is needed for the turmeric test? (a) yeast (b) a mirror (c) lemon juice (d) a battery cell
37. 37.🔮 Predict: which gives more drops in the bag — a hot sunny day or a cool cloudy day? (a) neither of them (b) the cool cloudy day (c) both the same (d) the hot sunny day
38. 38.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) turmeric powder (c) a magnet (d) white paper strips
39. 39.🧺 Do we need lemon juice for the secret lemon message? (a) needed (b) not needed
40. 40.🧺 Which of these is not needed for the fizzy balloon? (a) baking soda (b) a battery cell (c) an empty bottle (d) a funnel or spoon

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