Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 265 · 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 yeast balloon. Which one is NOT needed? (a) a paper clip (b) dry yeast (c) a small bottle (d) warm water
2. 2.🔍 Which is the odd one out? (a) soap solution (b) detergent water (c) baking soda water (d) salt water
3. 3.⚖️ 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
4. 4.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “the same kind of bag”? (a) we change it (b) we keep it the same (c) we measure it
5. 5.🧺 Which of these is not needed for the turmeric test? (a) a comb (b) soap solution (c) turmeric powder (d) a dropper or spoon
6. 6.📘 Is the fizzing a sign that a new substance is made? (a) it is only melting (b) yes, a new gas forms (c) no, nothing changes (d) it is only dissolving
7. 7.🛟 What should you do if vinegar splashes in your eye? (a) add baking soda (b) rinse with clean water (c) rub it hard (d) ignore it
8. 8.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) sunlight (b) yeast (c) a rubber band (d) a potted plant
9. 9.🫗 Which of these is done by winnowing? (a) bad grains from rice (b) small stones from dal (c) chaff from wheat grain (d) bran from wheat flour
10. 10.🛟 Why is a plastic jar a good choice for shaking? (a) it will not break (b) it is magnetic (c) it is hotter (d) it is heavier
11. 11.🧂 Does baking soda dissolve in water? (a) dissolves in water (b) does not dissolve
12. 12.🟡 Which of these turns turmeric reddish-brown? (a) soap solution (b) lemon juice (c) salt water (d) plain water
13. 13.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the light we look in”? (a) we change it (b) we keep it the same (c) we measure it
14. 14.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) a small bottle (c) a magnet (d) dry yeast
15. 15.🔍 Which is the odd one out? (a) plain water (b) salt water (c) vinegar (d) detergent water
16. 16.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) reddish (b) white at once (c) green (d) bright blue
17. 17.🛟 Why must the jar lid be screwed on tightly? (a) so it turns yellow (b) so it gets hot (c) so air gets out (d) so cream does not spill
18. 18.🔍 Which is the odd one out? (a) ironing the paper (b) dipping the cotton bud (c) plugging in the iron (d) cutting the lemon
19. 19.True or false: curd is a base. (a) False (b) True
20. 20.⚖️ Fair test — do seeds need water to sprout? Which of these is the one thing we change? (a) how many seeds sprout (b) wet or dry cotton (c) the same place (d) the same bowls
21. 21.🔮 Predict: you shake skimmed milk (with almost no cream) instead. What happens? (a) more butter forms (b) it turns to cheese (c) it turns blue (d) no butter forms
22. 22.True or false: yeast is not needed for the leafy bag test. (a) False (b) True
23. 23.🧺 Do we need a funnel or spoon for the fizzy balloon? (a) needed (b) not needed
24. 24.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a magnet (b) a dropper or spoon (c) turmeric powder (d) white paper strips
25. 25.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “the same jar”? (a) we change it (b) we keep it the same (c) we measure it
26. 26.True or false: seeds on wet cotton sprouts in a few days. (a) True (b) False
27. 27.⚖️ Fair test — do seeds need water to sprout? Which of these is what we measure? (a) wet or dry cotton (b) how many seeds sprout (c) the number of seeds (d) the kind of seeds
28. 28.🫧 Which of these is an acid? (a) sugar water (b) tamarind water (c) soap solution (d) baking soda water
29. 29.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is what we measure? (a) how hard we shake (b) the cream temperature (c) the same jar (d) time to make butter
30. 30.⚖️ Fair test — do seeds need water to sprout? True or false: the same place is kept the same. (a) False (b) True
31. 31.🍋 Secret message: who does this step — ironing the paper? (a) an adult does it (b) a child can do it
32. 32.🧂 Which of these dissolves in water? (a) glucose powder (b) small pebbles (c) sand (d) sawdust
33. 33.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the amount of water”? (a) we measure it (b) we change it (c) we keep it the same
34. 34.🔮 Predict: you use more vinegar and more baking soda. What happens to the balloon? (a) there is no change (b) it turns blue (c) it grows bigger (d) it shrinks
35. 35.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is kept the same? (a) how dark the writing is (b) the kind of juice (c) the same paper
36. 36.🛟 Who should use the hot iron in the secret message experiment? (a) whoever is fastest (b) only an adult (c) any child (d) the youngest child
37. 37.🧺 Which of these is not needed for growing salt crystals? (a) a battery cell (b) a shallow dish (c) warm water (d) salt
38. 38.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) baking soda (b) vinegar (c) a battery cell (d) a balloon
39. 39.🧺 Which of these is needed for making butter? (a) a balloon (b) a magnet (c) yeast (d) a bowl
40. 40.🔍 Muddy water is left still for an hour. What happens to the mud? (a) it dissolves (b) it turns to sand (c) it floats on top (d) it sinks to the bottom

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