Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 756 · 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.🧺 Do we need a magnet for the leafy bag test? (a) needed (b) not needed
2. 2.True or false: a mirror is not needed for the secret lemon message. (a) True (b) False
3. 3.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) a small bowl (b) moong seeds (c) water (d) turmeric powder
4. 4.🫗 How do we separate bran from wheat flour? (a) handpicking (b) evaporating (c) winnowing (d) sieving
5. 5.🍋 Secret message: who does this step — reading the message? (a) a child can do it (b) an adult does it
6. 6.⚖️ 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 change it (c) we keep it the same
7. 7.🧺 Do we need yeast for making butter? (a) needed (b) not needed
8. 8.⚖️ 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 change it (b) we keep it the same (c) we measure it
9. 9.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the kind of juice is the one thing we change. (a) True (b) False
10. 10.True or false: fresh cream is needed for making butter. (a) True (b) False
11. 11.🫗 Muddy water is poured through a cloth filter. What stays on the cloth? (a) the mud (b) nothing (c) the salt (d) the water
12. 12.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: how dark the writing is is what we measure. (a) False (b) True
13. 13.🌱 Is air needed for a seed to sprout? (a) not needed to sprout (b) needed to sprout
14. 14.🌱 Which of these is needed for a seed to sprout? (a) soil (b) sunlight (c) water (d) salt
15. 15.True or false: detergent water is neutral. (a) True (b) False
16. 16.🛟 Why should you never drink water just because it looks clear? (a) clear water is sweet (b) clear water is salty (c) germs are invisible (d) clear water is hot
17. 17.🧺 Which of these is needed for the leafy bag test? (a) yeast (b) vinegar (c) sunlight (d) a magnet
18. 18.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the same cotton bud is what we measure. (a) False (b) True
19. 19.🧺 Do we need a balloon for sprouting seeds? (a) not needed (b) needed
20. 20.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the amount of sugar”? (a) we keep it the same (b) we change it (c) we measure it
21. 21.🛟 Where should you keep the crystal dish while it dries? (a) safe from small children (b) on the edge of a table (c) next to the baby (d) in a busy doorway
22. 22.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is kept the same? (a) the filter material (b) the same glass (c) how clear the water is
23. 23.🔍 Which is the odd one out? (a) tamarind water (b) baking soda water (c) lemon juice (d) curd
24. 24.🔮 Predict: you use more vinegar and more baking soda. What happens to the balloon? (a) it grows bigger (b) it turns blue (c) there is no change (d) it shrinks
25. 25.🧺 Do we need an adult with an iron for the secret lemon message? (a) not needed (b) needed
26. 26.🔮 The fizzing stops after a while. Why? (a) the balloon got cold (b) the bottle got tired (c) the gas froze (d) an ingredient ran out
27. 27.True or false: dipping the cotton bud is a job for an adult. (a) False (b) True
28. 28.🧺 Which of these is needed for the fizzy balloon? (a) an empty bottle (b) a mirror (c) a battery cell (d) a comb
29. 29.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we keep it the same (b) we change it (c) we measure it
30. 30.🧺 Do we need a balloon for growing salt crystals? (a) not needed (b) needed
31. 31.True or false: seeds on wet cotton sprouts in a few days. (a) True (b) False
32. 32.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) reddish-brown (b) it stays white (c) bright blue (d) green
33. 33.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) no crystals (c) liquid crystals (d) bigger crystals
34. 34.True or false: freezing water is a change that cannot be undone. (a) False (b) True
35. 35.🛟 What should you do if vinegar splashes in your eye? (a) rub it hard (b) ignore it (c) rinse with clean water (d) add baking soda
36. 36.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: the cream temperature is kept the same. (a) True (b) False
37. 37.🧈 Which of these is a change that cannot be undone? (a) baking a cake (b) dissolving salt (c) melting butter (d) freezing water
38. 38.🔍 Which is the odd one out? (a) soap solution (b) lemon juice (c) detergent water (d) baking soda water
39. 39.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) a mirror (b) muddy water (c) a funnel (d) cotton or cloth
40. 40.📘 The browning of lemon juice with heat is a ___ change. (a) chemical (b) musical (c) magnetic (d) physical

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