Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 92 · 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.True or false: yeast is not needed for the leafy bag test. (a) False (b) True
2. 2.True or false: a shallow dish is not needed for growing salt crystals. (a) False (b) True
3. 3.🧺 Which of these is not needed for the leafy bag test? (a) sunlight (b) a clear plastic bag (c) vinegar (d) a potted plant
4. 4.🛟 Which rule keeps the turmeric test safe? (a) sip each liquid (b) mix bathroom cleaners (c) sniff each bottle hard (d) use only kitchen items
5. 5.True or false: sand and pebbles is not needed for the muddy water filter. (a) True (b) False
6. 6.🛟 How should the plastic bag be tied around the branch? (a) gently, not too tight (b) with sharp wire (c) with a hot glue gun (d) as tight as possible
7. 7.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we change it (b) we keep it the same (c) we measure it
8. 8.🧺 Do we need turmeric powder for sprouting seeds? (a) needed (b) not needed
9. 9.🫗 How do we separate husk from rice grain? (a) filtering (b) handpicking (c) evaporating (d) winnowing
10. 10.🍞 Which of these is something yeast needs? (a) salt (b) warm water (c) vinegar (d) a magnet
11. 11.🍞 Why do we add sugar to the yeast? (a) to make it heavy (b) to colour it (c) it is food for yeast (d) to make it sweet
12. 12.🧺 Which of these is needed for sprouting seeds? (a) a balloon (b) yeast (c) a battery cell (d) water
13. 13.🧂 Why do crystals appear as the dish dries? (a) salt eats water (b) the dish melts (c) salt grows roots (d) water evaporates
14. 14.🔮 Predict: you pour muddy water through two layers of cloth instead of one. The water comes out ___. (a) clearer (b) hot (c) salty (d) muddier
15. 15.🪴 Through which part does a plant take in water from the soil? (a) the fruits (b) the roots (c) the leaves (d) the flowers
16. 16.True or false: vinegar is not needed for the fizzy balloon. (a) True (b) False
17. 17.🧺 Do we need a battery cell for making butter? (a) needed (b) not needed
18. 18.🧈 Can this change be undone: melting ice? (a) can be undone (b) cannot be undone
19. 19.True or false: soap solution turns turmeric reddish-brown. (a) True (b) False
20. 20.🧺 Which of these is needed for growing salt crystals? (a) salt (b) a balloon (c) a battery cell (d) yeast
21. 21.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the kind of juice is the one thing we change. (a) False (b) True
22. 22.🧺 Do we need a paper clip for the yeast balloon? (a) needed (b) not needed
23. 23.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) white paper (b) a small bowl (c) a cotton bud (d) turmeric powder
24. 24.🧺 Which of these is not needed for the fizzy balloon? (a) a comb (b) baking soda (c) an empty bottle (d) vinegar
25. 25.🛟 After the yeast experiment, what should you do with the mixture? (a) keep it for a month (b) pour it down the sink (c) throw it at a wall (d) put it in your mouth
26. 26.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of yeast is kept the same. (a) False (b) True
27. 27.🧺 Which of these is needed for making butter? (a) a mirror (b) a bowl (c) a battery cell (d) turmeric powder
28. 28.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: the same bottle is what we measure. (a) True (b) False
29. 29.🧺 Which of these is needed for sprouting seeds? (a) a mirror (b) cotton wool (c) a balloon (d) yeast
30. 30.🍋 Secret message: who does this step — writing the message? (a) an adult does it (b) a child can do it
31. 31.🧂 Which of these does not dissolve in water? (a) food colour (b) table salt (c) sand (d) glucose powder
32. 32.🍞 Which of these is something yeast needs? (a) salt (b) sugar (c) sunlight (d) a magnet
33. 33.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: the time we wait is kept the same. (a) True (b) False
34. 34.🫧 Which of these is a base? (a) curd (b) tamarind water (c) detergent water (d) vinegar
35. 35.🛟 The water for the yeast should be ___. (a) boiling hot (b) very salty (c) warm, not hot (d) ice cold
36. 36.📘 Vinegar is an acid and baking soda is a base. What happens when they meet? (a) they freeze (b) they float apart (c) they react (d) they become magnets
37. 37.True or false: a battery cell is needed for the fizzy balloon. (a) True (b) False
38. 38.🍋 Secret message: who does this step — ironing the paper? (a) an adult does it (b) a child can do it
39. 39.🧺 Do we need a battery cell for the turmeric test? (a) not needed (b) needed
40. 40.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is what we measure? (a) the amount of vinegar (b) the kind of balloon (c) spoons of baking soda (d) size of the balloon

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