Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 315 · 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.🛟 What should you do after touching soil or seeds? (a) wash your hands (b) skip washing (c) rub your eyes (d) lick your fingers
2. 2.🔍 Which is the odd one out? (a) cutting the lemon (b) plugging in the iron (c) putting the iron away (d) writing the message
3. 3.🧺 Which of these is needed for the secret lemon message? (a) a mirror (b) yeast (c) white paper (d) a magnet
4. 4.🛟 Lemon juice stings cuts and eyes. What should you do after the experiment? (a) rub your eyes (b) lick your fingers (c) skip washing (d) wash your hands
5. 5.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) dry yeast (c) a small bottle (d) a mirror
6. 6.True or false: a battery cell is not needed for sprouting seeds. (a) True (b) False
7. 7.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) browning lemon ink (c) dissolving salt (d) baking a cake
8. 8.🔍 Which is the odd one out? (a) small pebbles (b) sand (c) cooking oil (d) sugar
9. 9.True or false: a balloon is not needed for growing salt crystals. (a) True (b) False
10. 10.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the filter material is what we measure. (a) True (b) False
11. 11.🔍 Which is the odd one out? (a) melting butter (b) dissolving salt (c) freezing water (d) baking a cake
12. 12.🔍 Which is the odd one out? (a) vinegar (b) a magnet (c) warm water (d) salt
13. 13.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) salt (c) a balloon (d) turmeric powder
14. 14.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the same paper is what we measure. (a) False (b) True
15. 15.🧺 Which of these is needed for the muddy water filter? (a) a balloon (b) a magnet (c) a clean glass (d) turmeric powder
16. 16.🫧 Which of these is an acid? (a) salt water (b) soap solution (c) tamarind water (d) plain water
17. 17.🫧 Is salt water an acid, a base or neutral? (a) neutral (b) a base (c) an acid
18. 18.🧺 Do we need white paper strips for the turmeric test? (a) needed (b) not needed
19. 19.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) bright blue (b) green (c) white at once (d) reddish
20. 20.🫧 Is orange juice an acid, a base or neutral? (a) neutral (b) an acid (c) a base
21. 21.True or false: curd is a base. (a) True (b) False
22. 22.True or false: warm water is needed for growing salt crystals. (a) False (b) True
23. 23.🧺 Do we need a balloon for the muddy water filter? (a) not needed (b) needed
24. 24.🧈 Which tool is used in many Indian homes to churn curd into butter? (a) a rolling pin (b) a mathani (churner) (c) a pressure cooker (d) a sieve
25. 25.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is kept the same. (a) False (b) True
26. 26.🧺 Do we need soap solution for the turmeric test? (a) not needed (b) needed
27. 27.⚖️ Fair test — do seeds need water to sprout? True or false: the kind of seeds is the one thing we change. (a) False (b) True
28. 28.🧺 Do we need turmeric powder for the turmeric test? (a) needed (b) not needed
29. 29.🛟 How should the plastic bag be tied around the branch? (a) with sharp wire (b) as tight as possible (c) gently, not too tight (d) with a hot glue gun
30. 30.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: the amount of cream is what we measure. (a) False (b) True
31. 31.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to butter (b) salt crystals form (c) sugar crystals form (d) it turns to oil
32. 32.🔍 Which is the odd one out? (a) water (b) soil (c) warmth (d) air
33. 33.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) baking soda (b) a tray for spills (c) vinegar (d) a mirror
34. 34.🧺 Do we need a balloon for sprouting seeds? (a) not needed (b) needed
35. 35.True or false: yeast is needed for the secret lemon message. (a) True (b) False
36. 36.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is the one thing we change? (a) the amount of vinegar (b) spoons of baking soda (c) size of the balloon (d) the kind of balloon
37. 37.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is kept the same? (a) the cream temperature (b) time to make butter (c) how hard we shake
38. 38.True or false: turmeric powder is not needed for making butter. (a) True (b) False
39. 39.📘 Vinegar is an acid and baking soda is a base. What happens when they meet? (a) they become magnets (b) they react (c) they float apart (d) they freeze
40. 40.🔍 Which is the odd one out? (a) soil (b) air (c) salt (d) sunlight

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