Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 776 · 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 yeast blow up the balloon more with warm water or cold water? What do we do with “size of the balloon”? (a) we keep it the same (b) we change it (c) we measure it
2. 2.🫗 How do we separate bad grains from rice? (a) handpicking (b) filtering (c) winnowing (d) sieving
3. 3.🪴 Which of these is a job of the roots? (a) hold up the leaves (b) carry water upward (c) take in water from soil (d) give out water vapour
4. 4.True or false: a magnet is needed for the secret lemon message. (a) True (b) False
5. 5.🧺 Do we need a jar with a tight lid for making butter? (a) needed (b) not needed
6. 6.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: the size of the plant is the one thing we change. (a) False (b) True
7. 7.🧺 Do we need yeast for sprouting seeds? (a) needed (b) not needed
8. 8.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) the same bottles (b) the water temperature (c) the amount of sugar (d) size of the balloon
9. 9.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “the same jar”? (a) we measure it (b) we keep it the same (c) we change it
10. 10.🔍 Which is the odd one out? (a) sugar (b) water (c) air (d) warmth
11. 11.🧺 Do we need turmeric powder for growing salt crystals? (a) needed (b) not needed
12. 12.True or false: soil is not needed for a seed to sprout. (a) True (b) False
13. 13.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) baking a cake (c) melting ice (d) folding paper
14. 14.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the amount poured”? (a) we measure it (b) we keep it the same (c) we change it
15. 15.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a balloon (c) a magnet (d) warm water
16. 16.🍋 Secret message: who does this step — putting the iron away? (a) a child can do it (b) an adult does it
17. 17.🍞 Does yeast need warm water to make gas? (a) yeast does not need it (b) yeast needs it
18. 18.True or false: a balloon is not needed for the yeast balloon. (a) False (b) True
19. 19.True or false: vinegar turns turmeric reddish-brown. (a) False (b) True
20. 20.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) cold water to rinse (b) fresh cream (c) a balloon (d) a bowl
21. 21.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a clear plastic bag (b) vinegar (c) a few hours (d) sunlight
22. 22.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the amount of water”? (a) we measure it (b) we change it (c) we keep it the same
23. 23.🪴 Which part of a plant does this job: carry water upward? (a) flower (b) roots (c) leaves (d) stem
24. 24.🔮 Predict: seeds on wet cotton are kept in the freezer. What happens? (a) they sprout faster (b) they glow (c) they grow fruit (d) they do not sprout
25. 25.🧺 Do we need cold water to rinse for making butter? (a) not needed (b) needed
26. 26.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the same paper is the one thing we change. (a) False (b) True
27. 27.🫗 How do we separate chaff from wheat grain? (a) handpicking (b) evaporating (c) sieving (d) winnowing
28. 28.🍞 Where is yeast used in the kitchen? (a) to wash dishes (b) to clean floors (c) to colour rice (d) to make bread rise
29. 29.🫧 Which of these is a base? (a) detergent water (b) lemon juice (c) plain water (d) vinegar
30. 30.🧺 Do we need sand and pebbles for the muddy water filter? (a) needed (b) not needed
31. 31.🫧 Which of these is a base? (a) baking soda water (b) orange juice (c) tamarind water (d) sugar water
32. 32.True or false: lemon juice is not needed for the turmeric test. (a) False (b) True
33. 33.🧺 Do we need a seed for the fizzy balloon? (a) needed (b) not needed
34. 34.🧺 Do we need turmeric powder for sprouting seeds? (a) not needed (b) needed
35. 35.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: spoons of baking soda is the one thing we change. (a) True (b) False
36. 36.🫧 Which of these is an acid? (a) plain water (b) baking soda water (c) detergent water (d) orange juice
37. 37.True or false: white paper strips is not needed for the turmeric test. (a) False (b) True
38. 38.🟡 Which of these turns turmeric reddish-brown? (a) soap solution (b) salt water (c) vinegar (d) plain water
39. 39.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is the one thing we change? (a) the iron setting (b) how dark the writing is (c) the kind of juice (d) the same paper
40. 40.⚖️ Fair test — do seeds need water to sprout? Which of these is kept the same? (a) the number of seeds (b) wet or dry cotton (c) how many seeds sprout

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