Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 219 · 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.🔮 Predict: sprouts grow in the dark for a week. What colour are their leaves? (a) bright red (b) blue (c) dark green (d) pale yellow
2. 2.🧺 Do we need a funnel or spoon for the fizzy balloon? (a) not needed (b) needed
3. 3.🪴 Which of these is a job of the roots? (a) take in water from soil (b) carry water upward (c) make seeds (d) give out water vapour
4. 4.🧺 Which of these is needed for making butter? (a) turmeric powder (b) yeast (c) a battery cell (d) a bowl
5. 5.⚖️ 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) False (b) True
6. 6.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? Which of these is kept the same? (a) amount of water drops (b) sun or shade (c) the time we wait
7. 7.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a small bowl (b) white paper (c) a balloon (d) lemon juice
8. 8.🟡 Why does soap solution change turmeric’s colour? (a) soap is hot (b) soap is magnetic (c) soap is an acid (d) soap water is a base
9. 9.True or false: plain water turns turmeric reddish-brown. (a) True (b) False
10. 10.🫗 How do we separate gravel from fine sand? (a) filtering (b) winnowing (c) evaporating (d) sieving
11. 11.True or false: a comb is needed for the fizzy balloon. (a) True (b) False
12. 12.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) a comb (c) turmeric powder (d) white paper strips
13. 13.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “the cream temperature”? (a) we keep it the same (b) we change it (c) we measure it
14. 14.🫧 Which of these is a base? (a) orange juice (b) plain water (c) baking soda water (d) tamarind water
15. 15.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the liquid we test (b) the number of drops (c) the colour we see (d) the turmeric paper
16. 16.⚖️ 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) True (b) False
17. 17.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is the one thing we change? (a) how clear the water is (b) the amount poured (c) the filter material (d) the same glass
18. 18.🛟 How should the plastic bag be tied around the branch? (a) with sharp wire (b) as tight as possible (c) with a hot glue gun (d) gently, not too tight
19. 19.🧈 Can this change be undone: rusting iron? (a) can be undone (b) cannot be undone
20. 20.🔍 Which is the odd one out? (a) sugar water (b) soap solution (c) plain water (d) salt water
21. 21.True or false: plain water keeps turmeric yellow. (a) True (b) False
22. 22.True or false: a magnet is not needed for the turmeric test. (a) True (b) False
23. 23.🟡 Turmeric paper meets soap solution. What happens? (a) turns reddish-brown (b) stays yellow
24. 24.🔍 What do you see inside the plastic bag after a few hours in the sun? (a) salt crystals (b) tiny insects (c) tiny water drops (d) nothing at all
25. 25.🔮 Predict: you shake skimmed milk (with almost no cream) instead. What happens? (a) it turns to cheese (b) it turns blue (c) no butter forms (d) more butter forms
26. 26.🔍 Which is the odd one out? (a) lemon juice (b) baking soda water (c) tamarind water (d) vinegar
27. 27.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) baking soda (b) a magnet (c) a balloon (d) a funnel or spoon
28. 28.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the same funnel is the one thing we change. (a) True (b) False
29. 29.🍞 Does yeast need a magnet to make gas? (a) yeast does not need it (b) yeast needs it
30. 30.True or false: a magnet is not needed for sprouting seeds. (a) False (b) True
31. 31.🍞 Does yeast need salt to make gas? (a) yeast does not need it (b) yeast needs it
32. 32.🛟 The water for the yeast should be ___. (a) ice cold (b) warm, not hot (c) very salty (d) boiling hot
33. 33.🫧 Which of these is neutral? (a) orange juice (b) salt water (c) detergent water (d) soap solution
34. 34.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the same glass”? (a) we keep it the same (b) we measure it (c) we change it
35. 35.⚖️ Fair test — do seeds need water to sprout? Which of these is the one thing we change? (a) the number of seeds (b) wet or dry cotton (c) the kind of seeds (d) the same place
36. 36.🔮 Predict: seeds on wet cotton are kept in the freezer. What happens? (a) they sprout faster (b) they do not sprout (c) they glow (d) they grow fruit
37. 37.🔮 Predict: the adult irons for only one second. What happens? (a) writing turns green (b) writing stays faint (c) the paper floats (d) it gets darker
38. 38.🧺 Which of these is needed for making butter? (a) fresh cream (b) a mirror (c) a battery cell (d) a balloon
39. 39.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) cooking an egg (c) freezing water (d) milk turning to curd
40. 40.🔮 Predict: which gives more drops in the bag — a hot sunny day or a cool cloudy day? (a) both the same (b) the hot sunny day (c) the cool cloudy day (d) neither of them

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