Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 754 · 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 — does a plant in the sun give out more water than one in the shade? Which of these is the one thing we change? (a) the size of the plant (b) the kind of plant (c) sun or shade (d) the time we wait
2. 2.🟡 Which of these turns turmeric reddish-brown? (a) sugar water (b) salt water (c) vinegar (d) soap solution
3. 3.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “the time we wait”? (a) we keep it the same (b) we measure it (c) we change it
4. 4.🧺 Which of these is not needed for sprouting seeds? (a) a few days (b) moong seeds (c) a balloon (d) cotton wool
5. 5.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we measure it (b) we change it (c) we keep it the same
6. 6.🧺 Do we need water for sprouting seeds? (a) needed (b) not needed
7. 7.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) vinegar (b) a tray for spills (c) a funnel or spoon (d) a battery cell
8. 8.🧺 Do we need a balloon for making butter? (a) needed (b) not needed
9. 9.True or false: a small bowl is not needed for sprouting seeds. (a) False (b) True
10. 10.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a few hours (b) a rubber band (c) a clear plastic bag (d) a battery cell
11. 11.⚖️ Fair test — do seeds need water to sprout? What do we do with “the same bowls”? (a) we measure it (b) we change it (c) we keep it the same
12. 12.⚖️ Fair test — do seeds need water to sprout? True or false: the kind of seeds is kept the same. (a) True (b) False
13. 13.🛟 Who should pour the warm water for the crystal experiment? (a) a friend who is running (b) the youngest child (c) nobody needs to (d) a grown-up
14. 14.🫧 Which of these is an acid? (a) orange juice (b) detergent water (c) soap solution (d) baking soda water
15. 15.🛟 Who should use the hot iron in the secret message experiment? (a) whoever is fastest (b) only an adult (c) any child (d) the youngest child
16. 16.🪴 Which part of a plant does this job: give out water vapour? (a) stem (b) flower (c) leaves (d) roots
17. 17.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the ironing time”? (a) we change it (b) we keep it the same (c) we measure it
18. 18.🫗 How do we separate bran from wheat flour? (a) sieving (b) filtering (c) handpicking (d) evaporating
19. 19.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a small bottle (c) a battery cell (d) dry yeast
20. 20.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the same bottle”? (a) we measure it (b) we keep it the same (c) we change it
21. 21.🧈 Which tool is used in many Indian homes to churn curd into butter? (a) a sieve (b) a mathani (churner) (c) a pressure cooker (d) a rolling pin
22. 22.🔍 Which is the odd one out? (a) soap solution (b) curd (c) detergent water (d) baking soda water
23. 23.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the filter material”? (a) we keep it the same (b) we change it (c) we measure it
24. 24.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) water (b) a small bowl (c) turmeric powder (d) moong seeds
25. 25.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is the one thing we change. (a) True (b) False
26. 26.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) cotton or cloth (b) a funnel (c) a clean glass (d) a balloon
27. 27.True or false: rusting iron is a change that cannot be undone. (a) True (b) False
28. 28.🔍 Which is the odd one out? (a) soap solution (b) baking soda water (c) detergent water (d) salt water
29. 29.True or false: a potted plant is needed for the leafy bag test. (a) True (b) False
30. 30.True or false: yeast is needed for growing salt crystals. (a) True (b) False
31. 31.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a battery cell (b) a bowl (c) a jar with a tight lid (d) fresh cream
32. 32.🪴 Which part of a plant does this job: hold the plant in soil? (a) flower (b) stem (c) leaves (d) roots
33. 33.True or false: a mirror is not needed for the secret lemon message. (a) True (b) False
34. 34.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the light we look in”? (a) we measure it (b) we change it (c) we keep it the same
35. 35.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) turmeric powder (b) a potted plant (c) a rubber band (d) a few hours
36. 36.🫗 Which of these is done by handpicking? (a) husk from rice grain (b) tea leaves from tea (c) bad grains from rice (d) bran from wheat flour
37. 37.True or false: water is not needed for the turmeric test. (a) True (b) False
38. 38.True or false: melting ice is a change that cannot be undone. (a) True (b) False
39. 39.True or false: orange juice is an acid. (a) True (b) False
40. 40.True or false: an adult with an iron is needed for the secret lemon message. (a) False (b) True

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