Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 791 · 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.🛟 How should the plastic bag be tied around the branch? (a) with sharp wire (b) gently, not too tight (c) with a hot glue gun (d) as tight as possible
2. 2.True or false: make seeds is a job of the flower. (a) False (b) True
3. 3.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “the cream temperature”? (a) we measure it (b) we keep it the same (c) we change it
4. 4.🟡 Which of these turns turmeric reddish-brown? (a) tamarind water (b) salt water (c) sugar water (d) soap solution
5. 5.🍋 Which of these steps is a job for an adult? (a) writing the message (b) dipping the cotton bud (c) letting the paper dry (d) cutting the lemon
6. 6.🍋 Which of these steps is a job a child can do? (a) dipping the cotton bud (b) plugging in the iron (c) ironing the paper (d) putting the iron away
7. 7.🫧 Is sugar water an acid, a base or neutral? (a) an acid (b) neutral (c) a base
8. 8.🧈 Which tool is used in many Indian homes to churn curd into butter? (a) a mathani (churner) (b) a pressure cooker (c) a rolling pin (d) a sieve
9. 9.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the ironing time”? (a) we keep it the same (b) we change it (c) we measure it
10. 10.🧺 Which of these is needed for the yeast balloon? (a) a small bottle (b) a battery cell (c) a paper clip (d) turmeric powder
11. 11.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) sand and pebbles (b) a clean glass (c) cotton or cloth (d) a balloon
12. 12.🧈 Can this change be undone: rusting iron? (a) can be undone (b) cannot be undone
13. 13.🛟 The water for the yeast should be ___. (a) warm, not hot (b) ice cold (c) boiling hot (d) very salty
14. 14.🔍 Which is the odd one out? (a) detergent water (b) soap solution (c) vinegar (d) baking soda water
15. 15.🧺 Do we need water for the turmeric test? (a) not needed (b) needed
16. 16.🔮 Can the brown writing go back to being invisible? (a) yes, if cooled (b) yes, if shaken (c) no, it stays brown (d) yes, in the dark
17. 17.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the same glass”? (a) we keep it the same (b) we measure it (c) we change it
18. 18.🪴 Through which part does a plant take in water from the soil? (a) the leaves (b) the fruits (c) the roots (d) the flowers
19. 19.True or false: baking soda water is neutral. (a) False (b) True
20. 20.🧈 Can this change be undone: folding paper? (a) cannot be undone (b) can be undone
21. 21.🧺 Which of these is not needed for the turmeric test? (a) lemon juice (b) turmeric powder (c) a balloon (d) white paper strips
22. 22.🎈 Why does the balloon blow up? (a) the bottle shrinks (b) outside air gets in (c) vinegar is hot (d) gas is made inside
23. 23.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the same bottle”? (a) we change it (b) we measure it (c) we keep it the same
24. 24.True or false: air is not needed for a seed to sprout. (a) True (b) False
25. 25.🧈 Can this change be undone: browning lemon ink? (a) cannot be undone (b) can be undone
26. 26.🧺 Do we need a small bowl for sprouting seeds? (a) not needed (b) needed
27. 27.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the same funnel”? (a) we measure it (b) we keep it the same (c) we change it
28. 28.True or false: seeds on wet cotton does not sprout. (a) False (b) True
29. 29.🛟 What should you do after handling muddy water? (a) wipe hands on face (b) lick your fingers (c) wash hands afterwards (d) nothing is needed
30. 30.🧺 Which of these is not needed for the leafy bag test? (a) a few hours (b) a clear plastic bag (c) a rubber band (d) yeast
31. 31.🍞 Does yeast need a magnet to make gas? (a) yeast needs it (b) yeast does not need it
32. 32.🧈 Which of these is a change that can be undone? (a) rusting iron (b) baking a cake (c) melting ice (d) browning lemon ink
33. 33.🧺 Do we need white paper strips for the turmeric test? (a) not needed (b) needed
34. 34.True or false: sugar is not needed for the yeast balloon. (a) True (b) False
35. 35.True or false: a bowl is needed for making butter. (a) False (b) True
36. 36.🧺 Which of these is needed for the muddy water filter? (a) yeast (b) a magnet (c) a funnel (d) a balloon
37. 37.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) dry yeast (c) a paper clip (d) warm water
38. 38.🫧 Is lemon juice an acid, a base or neutral? (a) neutral (b) an acid (c) a base
39. 39.True or false: vinegar is not needed for the fizzy balloon. (a) True (b) False
40. 40.🛟 Why must the jar lid be screwed on tightly? (a) so air gets out (b) so cream does not spill (c) so it gets hot (d) so it turns yellow

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