Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 528 · 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.🫧 Which of these is neutral? (a) tamarind water (b) detergent water (c) salt water (d) curd
2. 2.🛟 Why is a plastic jar a good choice for shaking? (a) it is hotter (b) it is heavier (c) it will not break (d) it is magnetic
3. 3.True or false: a few hours is needed for the leafy bag test. (a) True (b) False
4. 4.🌱 Which of these sprouts in a few days? (a) seeds on dry cotton (b) seeds in the freezer (c) wet seeds by a window (d) boiled seeds
5. 5.🧺 Do we need yeast for the secret lemon message? (a) not needed (b) needed
6. 6.🔮 Predict: you use plain water instead of vinegar. What happens? (a) it turns to honey (b) the balloon bursts (c) very little fizzing (d) a huge eruption
7. 7.🫧 Which of these is an acid? (a) soap solution (b) plain water (c) detergent water (d) vinegar
8. 8.True or false: a funnel is needed for the muddy water filter. (a) True (b) False
9. 9.🧺 Which of these is needed for the muddy water filter? (a) a magnet (b) sand and pebbles (c) yeast (d) a battery cell
10. 10.True or false: vinegar is a base. (a) True (b) False
11. 11.🧺 Which of these is needed for the leafy bag test? (a) a clear plastic bag (b) turmeric powder (c) a magnet (d) a battery cell
12. 12.True or false: a battery cell is needed for the yeast balloon. (a) True (b) False
13. 13.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a timer (b) a bowl (c) a mirror (d) cold water to rinse
14. 14.⚖️ 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 same bottles
15. 15.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a piece of string (c) salt (d) a balloon
16. 16.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) a friend who is running (c) a grown-up (d) nobody needs to
17. 17.🫗 Which of these is done by handpicking? (a) small stones from dal (b) gravel from fine sand (c) sugar from sugar water (d) bran from wheat flour
18. 18.🧺 Do we need a cotton bud for the secret lemon message? (a) needed (b) not needed
19. 19.True or false: turmeric powder is not needed for making butter. (a) False (b) True
20. 20.⚖️ 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 same bottles (b) the water temperature (c) the amount of yeast (d) the amount of water
21. 21.🧈 Can this change be undone: dissolving salt? (a) cannot be undone (b) can be undone
22. 22.⚖️ Fair test — do seeds need water to sprout? Which of these is kept the same? (a) how many seeds sprout (b) wet or dry cotton (c) the same bowls
23. 23.🍋 Which of these steps is a job a child can do? (a) putting the iron away (b) plugging in the iron (c) dipping the cotton bud (d) cutting the lemon
24. 24.📘 What is yeast? (a) a kind of stone (b) a tiny living fungus (c) a kind of sugar (d) a kind of salt
25. 25.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: how dark the writing is is the one thing we change. (a) True (b) False
26. 26.🟡 Turmeric paper meets vinegar. What happens? (a) stays yellow (b) turns reddish-brown
27. 27.🍋 Secret message: who does this step — cutting the lemon? (a) an adult does it (b) a child can do it
28. 28.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the same cotton bud is kept the same. (a) False (b) True
29. 29.True or false: salt water turns turmeric reddish-brown. (a) False (b) True
30. 30.True or false: make seeds is a job of the leaves. (a) True (b) False
31. 31.True or false: vinegar is an acid. (a) False (b) True
32. 32.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) cold water to rinse (b) turmeric powder (c) fresh cream (d) a bowl
33. 33.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a mirror (b) a balloon (c) a small bottle (d) warm water
34. 34.🟡 Which of these keeps turmeric yellow? (a) baking soda water (b) detergent water (c) soap solution (d) lemon juice
35. 35.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) next to the baby (c) safe from small children (d) in a busy doorway
36. 36.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
37. 37.⚖️ Fair test — do seeds need water to sprout? What do we do with “the same bowls”? (a) we change it (b) we measure it (c) we keep it the same
38. 38.🔍 Which is the odd one out? (a) detergent water (b) baking soda water (c) vinegar (d) soap solution
39. 39.🍞 Where is yeast used in the kitchen? (a) to wash dishes (b) to colour rice (c) to make bread rise (d) to clean floors
40. 40.True or false: muddy water is not needed for the muddy water filter. (a) True (b) False

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