Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 231 · 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.🧈 Which tool is used in many Indian homes to churn curd into butter? (a) a rolling pin (b) a pressure cooker (c) a mathani (churner) (d) a sieve
2. 2.🧺 Do we need a bowl for making butter? (a) needed (b) not needed
3. 3.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it bursts at once (b) it grows much faster (c) it turns yellow (d) it grows very little
4. 4.🍞 Why do we add sugar to the yeast? (a) to make it sweet (b) to colour it (c) to make it heavy (d) it is food for yeast
5. 5.🧈 Can this change be undone: melting ice? (a) cannot be undone (b) can be undone
6. 6.True or false: an adult with an iron is not needed for the secret lemon message. (a) True (b) False
7. 7.True or false: sugar is not needed for the fizzy balloon. (a) False (b) True
8. 8.🧈 Which of these is a change that can be undone? (a) rusting iron (b) browning lemon ink (c) dissolving salt (d) cooking an egg
9. 9.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) dry yeast (c) warm water (d) turmeric powder
10. 10.🛟 What should you do after touching soil or seeds? (a) rub your eyes (b) wash your hands (c) skip washing (d) lick your fingers
11. 11.🍋 Secret message: who does this step — writing the message? (a) a child can do it (b) an adult does it
12. 12.True or false: cotton or cloth is not needed for the muddy water filter. (a) False (b) True
13. 13.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “how clear the water is”? (a) we measure it (b) we change it (c) we keep it the same
14. 14.True or false: yeast is not needed for the leafy bag test. (a) False (b) True
15. 15.🔍 Which is the odd one out? (a) warm water (b) time (c) a magnet (d) sugar
16. 16.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the same muddy water”? (a) we measure it (b) we keep it the same (c) we change it
17. 17.True or false: sugar from sugar water is done by handpicking. (a) True (b) False
18. 18.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? Which of these is the one thing we change? (a) the time we wait (b) sun or shade (c) the same kind of bag (d) the size of the plant
19. 19.True or false: soil is needed for a seed to sprout. (a) False (b) True
20. 20.🍋 What colour does the lemon writing turn when an adult warms it? (a) green (b) blue (c) brown (d) white
21. 21.🧺 Do we need a funnel or spoon for the fizzy balloon? (a) needed (b) not needed
22. 22.🔍 Which is the odd one out? (a) melting ice (b) milk turning to curd (c) dissolving salt (d) melting butter
23. 23.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the light we look in (b) the turmeric paper (c) the liquid we test (d) the colour we see
24. 24.🪴 Which of these is a job of the roots? (a) hold up the leaves (b) give out water vapour (c) take in water from soil (d) carry water upward
25. 25.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we measure it (b) we change it (c) we keep it the same
26. 26.🧺 Which of these is needed for the fizzy balloon? (a) sugar (b) a seed (c) a comb (d) vinegar
27. 27.🧈 What is the watery liquid left after the butter forms? (a) vinegar (b) honey (c) oil (d) buttermilk
28. 28.🔍 Which is the odd one out? (a) sunlight (b) salt (c) a magnet (d) warm water
29. 29.🧺 Which of these is not needed for the fizzy balloon? (a) a battery cell (b) baking soda (c) a balloon (d) an empty bottle
30. 30.🔮 Predict: a plant gets no water for many days in summer. What happens? (a) it flowers more (b) it wilts and droops (c) it grows faster (d) it turns blue
31. 31.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the filter material is what we measure. (a) True (b) False
32. 32.🔍 Which is the odd one out? (a) sand (b) table salt (c) chalk powder (d) sawdust
33. 33.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) green (b) white at once (c) reddish (d) bright blue
34. 34.🛟 Which rule keeps the turmeric test safe? (a) sip each liquid (b) sniff each bottle hard (c) use only kitchen items (d) mix bathroom cleaners
35. 35.True or false: freezing water is a change that can be undone. (a) True (b) False
36. 36.🧺 Do we need yeast for growing salt crystals? (a) needed (b) not needed
37. 37.🔍 Which is the odd one out? (a) dissolving salt (b) freezing water (c) melting ice (d) cooking an egg
38. 38.🧂 Which of these dissolves in water? (a) small pebbles (b) cooking oil (c) sand (d) sugar
39. 39.🌱 Why do the seeds on dry cotton not sprout? (a) they are too wet (b) they have no salt (c) they have no soil (d) they have no water
40. 40.True or false: plugging in the iron is a job for an adult. (a) False (b) True

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