Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 78 · 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.🍋 Why can’t you see the lemon writing once it dries? (a) it turned into air (b) the ink is magnetic (c) the paper ate it (d) dry juice is see-through
2. 2.🔍 What do you see inside the plastic bag after a few hours in the sun? (a) salt crystals (b) tiny water drops (c) nothing at all (d) tiny insects
3. 3.🔮 Predict: you pour muddy water through two layers of cloth instead of one. The water comes out ___. (a) muddier (b) clearer (c) hot (d) salty
4. 4.🫗 Muddy water is poured through a cloth filter. What stays on the cloth? (a) the mud (b) nothing (c) the water (d) the salt
5. 5.🌱 Which of these does not sprout? (a) boiled seeds (b) wet seeds in the dark (c) wet seeds by a window (d) seeds on wet cotton
6. 6.🌱 Is air needed for a seed to sprout? (a) not needed to sprout (b) needed to sprout
7. 7.🧺 Which of these is needed for the leafy bag test? (a) a few hours (b) vinegar (c) a magnet (d) yeast
8. 8.🛟 The water for the yeast should be ___. (a) boiling hot (b) ice cold (c) very salty (d) warm, not hot
9. 9.True or false: a few days is needed for sprouting seeds. (a) True (b) False
10. 10.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is what we measure? (a) the amount of vinegar (b) size of the balloon (c) the kind of balloon (d) spoons of baking soda
11. 11.🧺 Which of these is not needed for the turmeric test? (a) turmeric powder (b) a dropper or spoon (c) a comb (d) water
12. 12.🫗 How do we separate husk from rice grain? (a) filtering (b) handpicking (c) evaporating (d) winnowing
13. 13.🛟 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
14. 14.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the liquid we test (b) the colour we see (c) the turmeric paper
15. 15.🧺 Do we need salt for growing salt crystals? (a) needed (b) not needed
16. 16.True or false: moong seeds is needed for sprouting seeds. (a) True (b) False
17. 17.🪴 Which part of a plant does this job: make food in sunlight? (a) stem (b) leaves (c) roots (d) flower
18. 18.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) the amount of water (b) the water temperature (c) the same bottles (d) size of the balloon
19. 19.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the amount of vinegar”? (a) we change it (b) we measure it (c) we keep it the same
20. 20.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “how dark the writing is”? (a) we measure it (b) we keep it the same (c) we change it
21. 21.🍞 Which of these is something yeast needs? (a) a magnet (b) vinegar (c) salt (d) warm water
22. 22.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “the amount of cream”? (a) we change it (b) we measure it (c) we keep it the same
23. 23.🧈 Before the butter appears, what does the cream turn into? (a) ice (b) powder (c) thick whipped cream (d) clear water
24. 24.🧈 What is the watery liquid left after the butter forms? (a) oil (b) buttermilk (c) honey (d) vinegar
25. 25.🔍 Which is the odd one out? (a) reading the message (b) cutting the lemon (c) writing the message (d) letting the paper dry
26. 26.True or false: a small bowl is not needed for sprouting seeds. (a) True (b) False
27. 27.🔮 Predict: tea is poured through a strainer. What happens to the tea leaves? (a) both stay behind (b) tea stays behind (c) leaves pass through (d) leaves stay behind
28. 28.🔮 Predict: you write with plain water instead of lemon juice. What appears after ironing? (a) blue words (b) almost nothing (c) dark brown words (d) a rainbow
29. 29.🧺 Do we need a balloon for sprouting seeds? (a) not needed (b) needed
30. 30.True or false: sugar dissolves in water. (a) True (b) False
31. 31.🟡 Turmeric paper meets vinegar. What happens? (a) stays yellow (b) turns reddish-brown
32. 32.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of water is the one thing we change. (a) False (b) True
33. 33.🛟 How should the plastic bag be tied around the branch? (a) as tight as possible (b) with sharp wire (c) with a hot glue gun (d) gently, not too tight
34. 34.True or false: turmeric powder is not needed for the turmeric test. (a) False (b) True
35. 35.⚖️ Fair test — do seeds need water to sprout? Which of these is what we measure? (a) the number of seeds (b) the kind of seeds (c) the same bowls (d) how many seeds sprout
36. 36.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: the kind of balloon is kept the same. (a) False (b) True
37. 37.🔍 Which is the odd one out? (a) table salt (b) food colour (c) sugar (d) sawdust
38. 38.🔍 Which is the odd one out? (a) tamarind water (b) detergent water (c) plain water (d) vinegar
39. 39.🫧 Which of these is a base? (a) vinegar (b) lemon juice (c) salt water (d) baking soda water
40. 40.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is what we measure? (a) the same jar (b) time to make butter (c) the amount of cream (d) the cream temperature

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