Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 6 · 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.True or false: lemon juice is a base. (a) True (b) False
2. 2.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) lemon juice (c) a balloon (d) soap solution
3. 3.⚖️ 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) wet or dry cotton (d) how many seeds sprout
4. 4.🔮 Predict: you use plain water instead of vinegar. What happens? (a) the balloon bursts (b) it turns to honey (c) very little fizzing (d) a huge eruption
5. 5.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a cotton bud (b) lemon juice (c) a magnet (d) an adult with an iron
6. 6.True or false: sugar water keeps turmeric yellow. (a) False (b) True
7. 7.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is the one thing we change? (a) the water temperature (b) the amount of sugar (c) the same bottles (d) the amount of yeast
8. 8.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns red (b) it stays yellow (c) it turns blue (d) it turns black
9. 9.🍋 Which of these steps is a job a child can do? (a) dipping the cotton bud (b) plugging in the iron (c) cutting the lemon (d) ironing the paper
10. 10.🔮 Predict: you stop shaking after only one minute. What do you have? (a) still runny cream (b) ghee (c) butter lumps (d) cheese
11. 11.True or false: cold water to rinse is needed for making butter. (a) True (b) False
12. 12.🧺 Which of these is needed for making butter? (a) a battery cell (b) a balloon (c) a jar with a tight lid (d) a mirror
13. 13.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the amount of salt”? (a) we change it (b) we measure it (c) we keep it the same
14. 14.True or false: salt from sea water is done by evaporating. (a) True (b) False
15. 15.🫧 Which of these is an acid? (a) sugar water (b) vinegar (c) baking soda water (d) salt water
16. 16.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a few hours (b) sunlight (c) a clear plastic bag (d) turmeric powder
17. 17.🫗 Which of these is done by sieving? (a) sugar from sugar water (b) salt from sea water (c) chaff from wheat grain (d) bran from wheat flour
18. 18.🧺 Which of these is needed for the muddy water filter? (a) a mirror (b) yeast (c) cotton or cloth (d) a balloon
19. 19.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) sugar (c) a magnet (d) a small bottle
20. 20.🔮 Can the brown writing go back to being invisible? (a) yes, in the dark (b) yes, if cooled (c) yes, if shaken (d) no, it stays brown
21. 21.🧺 Which of these is not needed for the fizzy balloon? (a) an empty bottle (b) a magnet (c) a tray for spills (d) baking soda
22. 22.🛟 The water for the yeast should be ___. (a) very salty (b) warm, not hot (c) boiling hot (d) ice cold
23. 23.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a seed (b) a tray for spills (c) baking soda (d) an empty bottle
24. 24.🫧 What do you see when baking soda meets vinegar? (a) it turns to ice (b) nothing at all (c) it glows in the dark (d) lots of fizzy bubbles
25. 25.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is kept the same. (a) False (b) True
26. 26.True or false: a magnet is not needed for the leafy bag test. (a) False (b) True
27. 27.🧺 Do we need a rubber band for the leafy bag test? (a) needed (b) not needed
28. 28.True or false: a rubber band is needed for the leafy bag test. (a) False (b) True
29. 29.🔍 Which is the odd one out? (a) sugar (b) chalk powder (c) food colour (d) glucose powder
30. 30.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the ironing time is what we measure. (a) False (b) True
31. 31.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the same paper”? (a) we measure it (b) we keep it the same (c) we change it
32. 32.📘 What is yeast? (a) a kind of sugar (b) a kind of stone (c) a kind of salt (d) a tiny living fungus
33. 33.True or false: salt is something yeast needs. (a) True (b) False
34. 34.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a jar with a tight lid (b) cold water to rinse (c) a mirror (d) a bowl
35. 35.🪴 Which of these is a job of the roots? (a) make seeds (b) hold the plant in soil (c) make food in sunlight (d) give out water vapour
36. 36.🍋 Secret message: who does this step — putting the iron away? (a) a child can do it (b) an adult does it
37. 37.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of sugar is the one thing we change. (a) False (b) True
38. 38.🧺 Do we need warm water for growing salt crystals? (a) needed (b) not needed
39. 39.🍋 Secret message: who does this step — letting the paper dry? (a) a child can do it (b) an adult does it
40. 40.🛟 Why is a plastic jar a good choice for shaking? (a) it is magnetic (b) it is hotter (c) it will not break (d) it is heavier

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