Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 557 · 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.🟡 Turmeric paper meets tamarind water. What happens? (a) stays yellow (b) turns reddish-brown
2. 2.🧺 Which of these is needed for sprouting seeds? (a) a balloon (b) turmeric powder (c) cotton wool (d) a battery cell
3. 3.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “how hard we shake”? (a) we measure it (b) we keep it the same (c) we change it
4. 4.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is the one thing we change? (a) time to make butter (b) how hard we shake (c) the amount of cream (d) the cream temperature
5. 5.🛟 After the yeast experiment, what should you do with the mixture? (a) put it in your mouth (b) keep it for a month (c) pour it down the sink (d) throw it at a wall
6. 6.🔍 Which is the odd one out? (a) detergent water (b) soap solution (c) sugar water (d) baking soda water
7. 7.🔍 What do you see after shaking cream in a jar for a long time? (a) sugar crystals (b) bubbles of gas (c) clear water only (d) lumps of butter
8. 8.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “how dark the writing is”? (a) we change it (b) we keep it the same (c) we measure it
9. 9.🧺 Do we need a comb for the fizzy balloon? (a) needed (b) not needed
10. 10.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is kept the same? (a) the kind of juice (b) how dark the writing is (c) the same paper
11. 11.🔍 Which is the odd one out? (a) warmth (b) soil (c) sunlight (d) salt
12. 12.🌱 Will these sprout: boiled seeds? (a) sprouts (b) does not sprout
13. 13.🫧 Which of these is an acid? (a) salt water (b) soap solution (c) baking soda water (d) vinegar
14. 14.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the same paper is kept the same. (a) True (b) False
15. 15.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the same bottle”? (a) we measure it (b) we keep it the same (c) we change it
16. 16.True or false: a funnel is needed for the muddy water filter. (a) False (b) True
17. 17.🍋 Which of these steps is a job for an adult? (a) ironing the paper (b) reading the message (c) dipping the cotton bud (d) letting the paper dry
18. 18.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: size of the balloon is what we measure. (a) False (b) True
19. 19.🧈 Can this change be undone: browning lemon ink? (a) can be undone (b) cannot be undone
20. 20.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a mirror (b) lemon juice (c) white paper strips (d) soap solution
21. 21.🍋 Secret message: who does this step — putting the iron away? (a) a child can do it (b) an adult does it
22. 22.🫗 Which of these is done by sieving? (a) bran from wheat flour (b) tea leaves from tea (c) chaff from wheat grain (d) small stones from dal
23. 23.📘 What do we call plants giving out water vapour from their leaves? (a) reflection (b) transpiration (c) digestion (d) germination
24. 24.🍋 Which of these steps is a job a child can do? (a) ironing the paper (b) putting the iron away (c) cutting the lemon (d) letting the paper dry
25. 25.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “sun or shade”? (a) we measure it (b) we keep it the same (c) we change it
26. 26.True or false: moong seeds is not needed for sprouting seeds. (a) False (b) True
27. 27.🛟 Who should use the hot iron in the secret message experiment? (a) the youngest child (b) whoever is fastest (c) any child (d) only an adult
28. 28.🔮 Predict: you shake skimmed milk (with almost no cream) instead. What happens? (a) no butter forms (b) it turns to cheese (c) more butter forms (d) it turns blue
29. 29.🍞 Why do we add sugar to the yeast? (a) to make it sweet (b) to make it heavy (c) it is food for yeast (d) to colour it
30. 30.🧺 Which of these is not needed for the muddy water filter? (a) a funnel (b) muddy water (c) a clean glass (d) a mirror
31. 31.🍋 Secret message: who does this step — cutting the lemon? (a) an adult does it (b) a child can do it
32. 32.🍞 Which of these is something yeast does not need? (a) time (b) warm water (c) sugar (d) a magnet
33. 33.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) a mirror (c) sugar (d) warm water
34. 34.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) warm water (c) a shallow dish (d) a balloon
35. 35.🌱 Which of these sprouts in a few days? (a) seeds on dry cotton (b) seeds in the freezer (c) wet seeds by a window (d) boiled seeds
36. 36.🧺 Do we need white paper strips for the turmeric test? (a) not needed (b) needed
37. 37.🔮 Predict: you pour muddy water through two layers of cloth instead of one. The water comes out ___. (a) muddier (b) hot (c) salty (d) clearer
38. 38.True or false: ironing the paper is a job a child can do. (a) True (b) False
39. 39.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) sugar water (c) detergent water (d) baking soda water
40. 40.🔍 What do you see inside the plastic bag after a few hours in the sun? (a) nothing at all (b) salt crystals (c) tiny water drops (d) tiny insects

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