Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 465 · 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.⚖️ Fair test — do seeds need water to sprout? What do we do with “wet or dry cotton”? (a) we measure it (b) we change it (c) we keep it the same
2. 2.🍞 Does yeast need a magnet to make gas? (a) yeast does not need it (b) yeast needs it
3. 3.True or false: browning lemon ink is a change that can be undone. (a) True (b) False
4. 4.True or false: wet seeds in the dark does not sprout. (a) False (b) True
5. 5.🧺 Do we need a shallow dish for growing salt crystals? (a) not needed (b) needed
6. 6.🍋 Which of these steps is a job for an adult? (a) dipping the cotton bud (b) reading the message (c) cutting the lemon (d) writing the message
7. 7.⚖️ Fair test — do seeds need water to sprout? Which of these is kept the same? (a) how many seeds sprout (b) wet or dry cotton (c) the same bowls
8. 8.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: spoons of baking soda is what we measure. (a) False (b) True
9. 9.🛟 Why must children keep their fingers away from the iron? (a) it is magnetic (b) it can burn skin (c) it is cold (d) it is sticky
10. 10.🔮 Predict: you filter salty water through cloth. Does the salt stay on the cloth? (a) yes, all of it (b) it turns to sand (c) no, salt passes through (d) it turns to sugar
11. 11.True or false: a magnet is needed for the yeast balloon. (a) False (b) True
12. 12.🛟 Why should you never drink water just because it looks clear? (a) clear water is hot (b) clear water is sweet (c) clear water is salty (d) germs are invisible
13. 13.True or false: a battery cell is needed for sprouting seeds. (a) True (b) False
14. 14.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it grows faster (b) the yeast is killed (c) it turns to sugar (d) it glows
15. 15.🔍 Which is the odd one out? (a) salt (b) sunlight (c) time (d) vinegar
16. 16.🧺 Do we need muddy water for the muddy water filter? (a) not needed (b) needed
17. 17.⚖️ Fair test — do seeds need water to sprout? True or false: the kind of seeds is kept the same. (a) False (b) True
18. 18.True or false: vinegar is needed for the fizzy balloon. (a) False (b) True
19. 19.🌱 Which of these is not needed for a seed to sprout? (a) soil (b) water (c) air (d) warmth
20. 20.🌱 Which of these sprouts in a few days? (a) boiled seeds (b) seeds on dry cotton (c) seeds on wet cotton (d) seeds in the freezer
21. 21.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is the one thing we change? (a) how dark the writing is (b) the kind of juice (c) the iron setting (d) the same paper
22. 22.🫧 Which of these is a base? (a) lemon juice (b) vinegar (c) baking soda water (d) tamarind water
23. 23.🛟 Why must a plastic bag never go over anyone’s head? (a) it gets wet (b) it is too big (c) it can block breathing (d) it changes colour
24. 24.🧺 Which of these is needed for the turmeric test? (a) turmeric powder (b) a comb (c) a balloon (d) a battery cell
25. 25.True or false: turmeric powder is needed for the leafy bag test. (a) False (b) True
26. 26.True or false: soap solution is an acid. (a) False (b) True
27. 27.🧺 Do we need a mirror for the muddy water filter? (a) not needed (b) needed
28. 28.🧺 Do we need a balloon for the secret lemon message? (a) not needed (b) needed
29. 29.🍋 Secret message: who does this step — plugging in the iron? (a) a child can do it (b) an adult does it
30. 30.True or false: detergent water keeps turmeric yellow. (a) True (b) False
31. 31.🪴 Which part of a plant does this job: give out water vapour? (a) stem (b) roots (c) flower (d) leaves
32. 32.🔮 Predict: you cover the dish so no water can escape. What happens? (a) crystals grow faster (b) few or no crystals (c) it fizzes (d) it turns sweet
33. 33.📘 What do we call plants giving out water vapour from their leaves? (a) reflection (b) transpiration (c) digestion (d) germination
34. 34.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is the one thing we change? (a) size of the balloon (b) the water temperature (c) the amount of sugar (d) the amount of yeast
35. 35.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) yeast (b) cold water to rinse (c) a timer (d) fresh cream
36. 36.📘 What do we call a solution that cannot dissolve any more salt? (a) frozen (b) saturated (c) empty (d) magnetic
37. 37.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the same funnel is what we measure. (a) True (b) False
38. 38.True or false: baking soda is not needed for the fizzy balloon. (a) True (b) False
39. 39.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns green (b) it stays yellow (c) it turns blue (d) reddish-brown
40. 40.🫗 Muddy water is poured through a cloth filter. What stays on the cloth? (a) the mud (b) the water (c) nothing (d) the salt

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