Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 787 · 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 — does more baking soda blow the balloon up bigger? Which of these is what we measure? (a) the same bottle (b) the amount of vinegar (c) size of the balloon (d) the kind of balloon
2. 2.🧂 Does table salt dissolve in water? (a) dissolves in water (b) does not dissolve
3. 3.True or false: a balloon is needed for the yeast balloon. (a) False (b) True
4. 4.🧺 Do we need muddy water for the muddy water filter? (a) needed (b) not needed
5. 5.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is the one thing we change? (a) the same dish (b) the kind of salt (c) sunny or shady place (d) the amount of water
6. 6.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) baking soda (b) a comb (c) an empty bottle (d) a funnel or spoon
7. 7.True or false: a mirror is not needed for the secret lemon message. (a) False (b) True
8. 8.🧺 Do we need sand and pebbles for the muddy water filter? (a) needed (b) not needed
9. 9.True or false: melting ice is a change that cannot be undone. (a) True (b) False
10. 10.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: the same jar is kept the same. (a) False (b) True
11. 11.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) yeast (b) a few hours (c) a potted plant (d) a rubber band
12. 12.🌱 Is air needed for a seed to sprout? (a) needed to sprout (b) not needed to sprout
13. 13.🍋 Secret message: who does this step — plugging in the iron? (a) an adult does it (b) a child can do it
14. 14.🛟 Why must the jar lid be screwed on tightly? (a) so it gets hot (b) so it turns yellow (c) so cream does not spill (d) so air gets out
15. 15.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is the one thing we change? (a) the kind of juice (b) the ironing time (c) the same cotton bud (d) the iron setting
16. 16.🍋 Secret message: who does this step — dipping the cotton bud? (a) a child can do it (b) an adult does it
17. 17.🧈 What is the watery liquid left after the butter forms? (a) oil (b) vinegar (c) honey (d) buttermilk
18. 18.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the colour we see (b) the liquid we test (c) the light we look in (d) the number of drops
19. 19.🫗 Which of these is done by winnowing? (a) husk from rice grain (b) bad grains from rice (c) salt from sea water (d) gravel from fine sand
20. 20.🔍 Which is the odd one out? (a) a magnet (b) warm water (c) sunlight (d) salt
21. 21.True or false: seeds on wet cotton does not sprout. (a) False (b) True
22. 22.🍋 Which of these steps is a job a child can do? (a) putting the iron away (b) writing the message (c) ironing the paper (d) cutting the lemon
23. 23.True or false: salt from sea water is done by evaporating. (a) False (b) True
24. 24.True or false: lemon juice is neutral. (a) True (b) False
25. 25.🧺 Do we need a mirror for the fizzy balloon? (a) not needed (b) needed
26. 26.🔮 Predict: you shake skimmed milk (with almost no cream) instead. What happens? (a) it turns to cheese (b) more butter forms (c) no butter forms (d) it turns blue
27. 27.📘 The browning of lemon juice with heat is a ___ change. (a) physical (b) magnetic (c) chemical (d) musical
28. 28.True or false: a mirror is needed for making butter. (a) True (b) False
29. 29.True or false: warm water is something yeast does not need. (a) True (b) False
30. 30.True or false: soil is not needed for a seed to sprout. (a) False (b) True
31. 31.⚖️ 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
32. 32.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it grows faster (b) it glows (c) the yeast is killed (d) it turns to sugar
33. 33.🟡 Which of these turns turmeric reddish-brown? (a) sugar water (b) tamarind water (c) vinegar (d) detergent water
34. 34.🫗 How do we separate bad grains from rice? (a) winnowing (b) filtering (c) handpicking (d) sieving
35. 35.True or false: bad grains from rice is done by handpicking. (a) False (b) True
36. 36.True or false: a mirror is not needed for the turmeric test. (a) True (b) False
37. 37.🧺 Which of these is needed for the turmeric test? (a) a mirror (b) turmeric powder (c) a balloon (d) a comb
38. 38.True or false: a battery cell is needed for the secret lemon message. (a) True (b) False
39. 39.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a mirror (b) dry yeast (c) a small bottle (d) warm water
40. 40.True or false: warm water is something yeast needs. (a) False (b) True

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