Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 999 · 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 — do seeds need water to sprout? What do we do with “the same place”? (a) we keep it the same (b) we measure it (c) we change it
2. 2.🔮 Predict: you tie a bag on a branch with no leaves. Will it collect much water? (a) much more water (b) exactly the same (c) it fills with soil (d) much less water
3. 3.🔍 Which is the odd one out? (a) cooking an egg (b) milk turning to curd (c) browning lemon ink (d) melting ice
4. 4.🔍 Which is the odd one out? (a) salt water (b) detergent water (c) plain water (d) lemon juice
5. 5.⚖️ Fair test — do seeds need water to sprout? Which of these is the one thing we change? (a) the same place (b) the kind of seeds (c) the same bowls (d) wet or dry cotton
6. 6.True or false: seeds in the freezer does not sprout. (a) False (b) True
7. 7.True or false: a bowl is not needed for making butter. (a) True (b) False
8. 8.🍞 Where is yeast used in the kitchen? (a) to make bread rise (b) to wash dishes (c) to colour rice (d) to clean floors
9. 9.🛟 The water for the yeast should be ___. (a) boiling hot (b) ice cold (c) very salty (d) warm, not hot
10. 10.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the water temperature”? (a) we keep it the same (b) we measure it (c) we change it
11. 11.🫗 Which of these is done by handpicking? (a) bran from wheat flour (b) small stones from dal (c) sugar from sugar water (d) mud from water
12. 12.🧺 Do we need turmeric powder for the leafy bag test? (a) needed (b) not needed
13. 13.🌱 Which of these is needed for a seed to sprout? (a) sunlight (b) salt (c) warmth (d) sugar
14. 14.🍋 What colour does the lemon writing turn when an adult warms it? (a) white (b) brown (c) green (d) blue
15. 15.🛟 What should you do if vinegar splashes in your eye? (a) rub it hard (b) rinse with clean water (c) ignore it (d) add baking soda
16. 16.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) an adult with an iron (b) yeast (c) lemon juice (d) white paper
17. 17.🌱 Is warmth needed for a seed to sprout? (a) not needed to sprout (b) needed to sprout
18. 18.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is what we measure? (a) the same jar (b) how hard we shake (c) the cream temperature (d) time to make butter
19. 19.🍞 Why do we add sugar to the yeast? (a) to colour it (b) to make it heavy (c) to make it sweet (d) it is food for yeast
20. 20.🔍 Which is the odd one out? (a) milk turning to curd (b) dissolving salt (c) rusting iron (d) browning lemon ink
21. 21.🔍 Which is the odd one out? (a) soap solution (b) baking soda water (c) salt water (d) detergent water
22. 22.🔮 Predict: you use more vinegar and more baking soda. What happens to the balloon? (a) it shrinks (b) there is no change (c) it turns blue (d) it grows bigger
23. 23.🛟 Turmeric stains clothes. What should you wear? (a) your school uniform (b) an old shirt or apron (c) your best clothes (d) a white party dress
24. 24.🪴 Which of these is a job of the roots? (a) take in water from soil (b) carry water upward (c) give out water vapour (d) make seeds
25. 25.🧺 Do we need a magnet for the secret lemon message? (a) needed (b) not needed
26. 26.🌊 How is salt made in salt pans by the sea? (a) fish make it (b) salt rains down (c) sea water evaporates (d) sand is ground up
27. 27.🔮 Predict: you use plain water instead of vinegar. What happens? (a) it turns to honey (b) very little fizzing (c) the balloon bursts (d) a huge eruption
28. 28.🧺 Do we need yeast for the leafy bag test? (a) not needed (b) needed
29. 29.📘 Vinegar is an acid and baking soda is a base. What happens when they meet? (a) they freeze (b) they react (c) they float apart (d) they become magnets
30. 30.True or false: detergent water is a base. (a) False (b) True
31. 31.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) the water temperature (b) size of the balloon (c) the amount of sugar
32. 32.🧺 Do we need a piece of string for growing salt crystals? (a) not needed (b) needed
33. 33.⚖️ 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
34. 34.🔍 Which is the odd one out? (a) baking soda water (b) soap solution (c) orange juice (d) detergent water
35. 35.True or false: a funnel is not needed for the muddy water filter. (a) False (b) True
36. 36.🟡 Which of these keeps turmeric yellow? (a) detergent water (b) sugar water (c) baking soda water (d) soap solution
37. 37.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is kept the same. (a) True (b) False
38. 38.🪴 Which of these is a job of the leaves? (a) take in water from soil (b) hold up the leaves (c) make food in sunlight (d) hold the plant in soil
39. 39.🧺 Which of these is not needed for growing salt crystals? (a) yeast (b) salt (c) a spoon (d) a piece of string
40. 40.🧺 Do we need yeast for the turmeric test? (a) not needed (b) needed

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