Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 242 · 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 of these is not needed for a seed to sprout? (a) soil (b) warmth (c) air (d) water
2. 2.True or false: an adult with an iron is needed for the secret lemon message. (a) True (b) False
3. 3.True or false: lemon juice is not needed for the secret lemon message. (a) True (b) False
4. 4.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) sand and pebbles (b) a clean glass (c) a funnel (d) turmeric powder
5. 5.🧺 Which of these is needed for the yeast balloon? (a) turmeric powder (b) a balloon (c) a magnet (d) a mirror
6. 6.🛟 Why must the jar lid be screwed on tightly? (a) so it gets hot (b) so it turns yellow (c) so cream does not spill (d) so air gets out
7. 7.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we measure it (b) we keep it the same (c) we change it
8. 8.📘 Is the fizzing a sign that a new substance is made? (a) it is only melting (b) no, nothing changes (c) yes, a new gas forms (d) it is only dissolving
9. 9.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) moong seeds (b) cotton wool (c) a small bowl (d) a battery cell
10. 10.🔍 Which is the odd one out? (a) tamarind water (b) curd (c) salt water (d) lemon juice
11. 11.🍞 Does yeast need vinegar to make gas? (a) yeast needs it (b) yeast does not need it
12. 12.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: the same bottle is kept the same. (a) True (b) False
13. 13.🔍 Which is the odd one out? (a) warmth (b) salt (c) air (d) water
14. 14.🧺 Do we need a few days for sprouting seeds? (a) needed (b) not needed
15. 15.🧺 Which of these is needed for the turmeric test? (a) a comb (b) a balloon (c) white paper strips (d) a magnet
16. 16.🧺 Do we need fresh cream for making butter? (a) not needed (b) needed
17. 17.🛟 Some seeds from shops are coated with chemicals. What is the safe rule? (a) feed them to pets (b) throw them at friends (c) never put seeds in mouth (d) eat a few to check
18. 18.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a shallow dish (c) a balloon (d) a spoon
19. 19.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is what we measure. (a) False (b) True
20. 20.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is what we measure? (a) size of the balloon (b) the kind of balloon (c) the amount of vinegar (d) the same bottle
21. 21.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “the amount of cream”? (a) we keep it the same (b) we change it (c) we measure it
22. 22.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it glows (b) the yeast is killed (c) it turns to sugar (d) it grows faster
23. 23.🟡 Which of these turns turmeric reddish-brown? (a) lemon juice (b) sugar water (c) soap solution (d) plain water
24. 24.🪴 Which of these is a job of the leaves? (a) take in water from soil (b) give out water vapour (c) hold up the leaves (d) make seeds
25. 25.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) a small bottle (c) a balloon (d) a magnet
26. 26.True or false: make food in sunlight is a job of the leaves. (a) False (b) True
27. 27.True or false: warm water is needed for growing salt crystals. (a) False (b) True
28. 28.True or false: sugar is not needed for the yeast balloon. (a) False (b) True
29. 29.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is what we measure? (a) time to make butter (b) the same jar (c) how hard we shake (d) the cream temperature
30. 30.🟡 Which of these turns turmeric reddish-brown? (a) salt water (b) vinegar (c) plain water (d) detergent water
31. 31.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: the size of the plant is what we measure. (a) True (b) False
32. 32.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a seed (b) baking soda (c) a balloon (d) a funnel or spoon
33. 33.True or false: a small bottle is needed for the yeast balloon. (a) False (b) True
34. 34.🌱 Which of these is needed for a seed to sprout? (a) soil (b) sunlight (c) water (d) salt
35. 35.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the ironing time is kept the same. (a) True (b) False
36. 36.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is kept the same? (a) how clear the water is (b) the same funnel (c) the filter material
37. 37.⚖️ 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) False (b) True
38. 38.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? Which of these is what we measure? (a) sun or shade (b) the kind of plant (c) the time we wait (d) amount of water drops
39. 39.🔮 Predict: you shake skimmed milk (with almost no cream) instead. What happens? (a) it turns blue (b) it turns to cheese (c) more butter forms (d) no butter forms
40. 40.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the same paper is kept the same. (a) False (b) True

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