Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 8 · 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.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) turmeric powder (b) a small bowl (c) lemon juice (d) an adult with an iron
2. 2.🧺 Which of these is not needed for the yeast balloon? (a) a magnet (b) sugar (c) warm water (d) a small bottle
3. 3.🫧 Which of these is a base? (a) curd (b) sugar water (c) tamarind water (d) detergent water
4. 4.🪴 Which part of a plant does this job: make seeds? (a) stem (b) flower (c) leaves (d) roots
5. 5.🔍 Which is the odd one out? (a) time (b) sugar (c) sunlight (d) warm water
6. 6.🧺 Do we need an empty bottle for the fizzy balloon? (a) not needed (b) needed
7. 7.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to oil (b) it turns to butter (c) sugar crystals form (d) salt crystals form
8. 8.🍋 What colour does the lemon writing turn when an adult warms it? (a) brown (b) green (c) blue (d) white
9. 9.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is the one thing we change. (a) False (b) True
10. 10.🧈 Can this change be undone: folding paper? (a) can be undone (b) cannot be undone
11. 11.🧺 Which of these is needed for the fizzy balloon? (a) a magnet (b) a funnel or spoon (c) a seed (d) a comb
12. 12.True or false: baking soda is not needed for the fizzy balloon. (a) False (b) True
13. 13.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) warm water (c) dry yeast (d) turmeric powder
14. 14.True or false: rusting iron is a change that can be undone. (a) True (b) False
15. 15.🧺 Do we need an adult with an iron for the secret lemon message? (a) not needed (b) needed
16. 16.🧺 Do we need a small bowl for the secret lemon message? (a) needed (b) not needed
17. 17.🧺 Do we need a tray for spills for the fizzy balloon? (a) needed (b) not needed
18. 18.True or false: plain water keeps turmeric yellow. (a) True (b) False
19. 19.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: the cream temperature is the one thing we change. (a) False (b) True
20. 20.🧺 Do we need a balloon for the fizzy balloon? (a) not needed (b) needed
21. 21.🛟 Who should pour the warm water for the crystal experiment? (a) a grown-up (b) the youngest child (c) a friend who is running (d) nobody needs to
22. 22.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the light we look in (b) the number of drops (c) the turmeric paper (d) the liquid we test
23. 23.🫗 How do we separate mud from water? (a) handpicking (b) sieving (c) filtering (d) evaporating
24. 24.🔍 Which is the odd one out? (a) detergent water (b) baking soda water (c) soap solution (d) tamarind water
25. 25.🔮 Predict: a plant gets no water for many days in summer. What happens? (a) it flowers more (b) it grows faster (c) it wilts and droops (d) it turns blue
26. 26.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is the one thing we change? (a) spoons of baking soda (b) the same bottle (c) the kind of balloon (d) the amount of vinegar
27. 27.🧺 Do we need a mirror for the turmeric test? (a) not needed (b) needed
28. 28.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is what we measure? (a) the same paper (b) how dark the writing is (c) the ironing time (d) the same cotton bud
29. 29.🫧 What do you see when baking soda meets vinegar? (a) lots of fizzy bubbles (b) it turns to ice (c) it glows in the dark (d) nothing at all
30. 30.🧂 Which of these does not dissolve in water? (a) baking soda (b) food colour (c) cooking oil (d) table salt
31. 31.🫧 Which of these is a base? (a) plain water (b) salt water (c) soap solution (d) orange juice
32. 32.🫗 How do we separate small stones from dal? (a) sieving (b) handpicking (c) winnowing (d) evaporating
33. 33.🧺 Which of these is not needed for the muddy water filter? (a) a funnel (b) turmeric powder (c) cotton or cloth (d) muddy water
34. 34.🔍 Which is the odd one out? (a) plugging in the iron (b) letting the paper dry (c) putting the iron away (d) cutting the lemon
35. 35.🍋 Secret message: who does this step — letting the paper dry? (a) an adult does it (b) a child can do it
36. 36.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) a magnet (b) moong seeds (c) water (d) cotton wool
37. 37.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it turns to bread (b) it shrinks to nothing (c) the balloon is bigger (d) the balloon is smaller
38. 38.🍞 Does yeast need time to make gas? (a) yeast needs it (b) yeast does not need it
39. 39.True or false: turmeric powder is needed for making butter. (a) True (b) False
40. 40.🧺 Which of these is needed for making butter? (a) a balloon (b) a magnet (c) a battery cell (d) a timer

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