Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 306 · 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 turns turmeric reddish-brown? (a) soap solution (b) plain water (c) salt water (d) lemon juice
2. 2.🛟 The water for the yeast should be ___. (a) boiling hot (b) warm, not hot (c) very salty (d) ice cold
3. 3.🔍 Which is the odd one out? (a) food colour (b) glucose powder (c) sugar (d) cooking oil
4. 4.True or false: a mirror is not needed for growing salt crystals. (a) True (b) False
5. 5.🧺 Which of these is needed for the secret lemon message? (a) a mirror (b) turmeric powder (c) a small bowl (d) a battery cell
6. 6.📘 Vinegar is an acid and baking soda is a base. What happens when they meet? (a) they freeze (b) they float apart (c) they react (d) they become magnets
7. 7.🔮 Predict: seeds on wet cotton are kept in the freezer. What happens? (a) they grow fruit (b) they glow (c) they sprout faster (d) they do not sprout
8. 8.True or false: yeast is needed for the secret lemon message. (a) True (b) False
9. 9.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the water temperature is the one thing we change. (a) False (b) True
10. 10.🧺 Do we need a battery cell for the yeast balloon? (a) needed (b) not needed
11. 11.True or false: putting the iron away is a job for an adult. (a) True (b) False
12. 12.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “time to make butter”? (a) we change it (b) we measure it (c) we keep it the same
13. 13.🧂 Which of these dissolves in water? (a) sawdust (b) small pebbles (c) sugar (d) chalk powder
14. 14.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is kept the same? (a) how hard we shake (b) time to make butter (c) the cream temperature
15. 15.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) lemon juice (c) a comb (d) turmeric powder
16. 16.🍞 Which of these is something yeast needs? (a) sunlight (b) a magnet (c) vinegar (d) time
17. 17.🧺 Do we need vinegar for the leafy bag test? (a) needed (b) not needed
18. 18.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) a few days (b) water (c) a battery cell (d) moong seeds
19. 19.🌱 Will these sprout: seeds on dry cotton? (a) sprouts (b) does not sprout
20. 20.⚖️ 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 change it (b) we measure it (c) we keep it the same
21. 21.True or false: boiled seeds sprouts in a few days. (a) False (b) True
22. 22.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a balloon (b) a seed (c) a tray for spills (d) a funnel or spoon
23. 23.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: sun or shade is kept the same. (a) True (b) False
24. 24.🧺 Which of these is needed for the leafy bag test? (a) yeast (b) vinegar (c) a clear plastic bag (d) a magnet
25. 25.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the same paper is kept the same. (a) False (b) True
26. 26.🧈 Can this change be undone: cooking an egg? (a) cannot be undone (b) can be undone
27. 27.🧺 Do we need baking soda for the fizzy balloon? (a) not needed (b) needed
28. 28.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: amount of water drops is the one thing we change. (a) True (b) False
29. 29.🫧 Which of these is an acid? (a) soap solution (b) tamarind water (c) salt water (d) plain water
30. 30.🔍 Which is the odd one out? (a) rusting iron (b) melting butter (c) cooking an egg (d) browning lemon ink
31. 31.🫗 Which of these is done by filtering? (a) small stones from dal (b) husk from rice grain (c) sugar from sugar water (d) mud from water
32. 32.True or false: baking soda water turns turmeric reddish-brown. (a) False (b) True
33. 33.🧺 Do we need a balloon for the secret lemon message? (a) not needed (b) needed
34. 34.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a balloon (b) fresh cream (c) a jar with a tight lid (d) a timer
35. 35.True or false: a battery cell is needed for the leafy bag test. (a) False (b) True
36. 36.🪴 Through which part does a plant take in water from the soil? (a) the roots (b) the fruits (c) the leaves (d) the flowers
37. 37.🍋 Secret message: who does this step — plugging in the iron? (a) a child can do it (b) an adult does it
38. 38.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) white paper strips (c) a mirror (d) soap solution
39. 39.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) a small bowl (b) moong seeds (c) a balloon (d) cotton wool
40. 40.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) yeast (b) muddy water (c) a clean glass (d) sand and pebbles

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