Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 448 · 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) False (b) True
2. 2.🫗 Muddy water is poured through a cloth filter. What stays on the cloth? (a) the mud (b) nothing (c) the water (d) the salt
3. 3.🔍 Which is the odd one out? (a) soap solution (b) detergent water (c) baking soda water (d) tamarind water
4. 4.True or false: yeast is not needed for the leafy bag test. (a) False (b) True
5. 5.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the liquid we test (b) the turmeric paper (c) the colour we see
6. 6.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is kept the same? (a) the kind of juice (b) the iron setting (c) how dark the writing is
7. 7.🔍 Which is the odd one out? (a) putting the iron away (b) letting the paper dry (c) dipping the cotton bud (d) reading the message
8. 8.🌱 Which of these is needed for a seed to sprout? (a) sugar (b) warmth (c) sunlight (d) soil
9. 9.True or false: tamarind water is neutral. (a) True (b) False
10. 10.🔍 Which is the odd one out? (a) soap solution (b) baking soda water (c) salt water (d) detergent water
11. 11.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the same bottles is kept the same. (a) True (b) False
12. 12.True or false: a piece of string is needed for growing salt crystals. (a) True (b) False
13. 13.🧺 Do we need a battery cell for the leafy bag test? (a) needed (b) not needed
14. 14.⚖️ Fair test — do seeds need water to sprout? True or false: the same bowls is kept the same. (a) True (b) False
15. 15.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “spoons of baking soda”? (a) we change it (b) we keep it the same (c) we measure it
16. 16.🧺 Do we need a magnet for the muddy water filter? (a) not needed (b) needed
17. 17.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a shallow dish (c) turmeric powder (d) salt
18. 18.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the filter material is the one thing we change. (a) True (b) False
19. 19.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) a mirror (c) dry yeast (d) warm water
20. 20.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns blue (b) it turns darker red (c) it turns yellow again (d) it disappears
21. 21.🔮 Predict: you stop shaking after only one minute. What do you have? (a) ghee (b) butter lumps (c) still runny cream (d) cheese
22. 22.True or false: bran from wheat flour is done by filtering. (a) False (b) True
23. 23.🍋 Secret message: who does this step — ironing the paper? (a) a child can do it (b) an adult does it
24. 24.🛟 The water for the yeast should be ___. (a) warm, not hot (b) very salty (c) boiling hot (d) ice cold
25. 25.🫧 Is lemon juice an acid, a base or neutral? (a) a base (b) an acid (c) neutral
26. 26.🧺 Do we need a spoon for growing salt crystals? (a) needed (b) not needed
27. 27.📘 Is the fizzing a sign that a new substance is made? (a) it is only dissolving (b) it is only melting (c) no, nothing changes (d) yes, a new gas forms
28. 28.📘 Vinegar is an acid and baking soda is a base. What happens when they meet? (a) they freeze (b) they react (c) they float apart (d) they become magnets
29. 29.🔍 Which is the odd one out? (a) detergent water (b) baking soda water (c) soap solution (d) orange juice
30. 30.🧺 Do we need a magnet for the secret lemon message? (a) needed (b) not needed
31. 31.🛟 Why must children keep their fingers away from the iron? (a) it is magnetic (b) it is sticky (c) it is cold (d) it can burn skin
32. 32.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: the cream temperature is what we measure. (a) True (b) False
33. 33.🧺 Which of these is needed for making butter? (a) a battery cell (b) turmeric powder (c) yeast (d) cold water to rinse
34. 34.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we change it (b) we keep it the same (c) we measure it
35. 35.🔮 Predict: sprouts grow in the dark for a week. What colour are their leaves? (a) dark green (b) bright red (c) pale yellow (d) blue
36. 36.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) a mirror (c) warm water (d) a piece of string
37. 37.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) warm water (c) a battery cell (d) dry yeast
38. 38.🟡 Turmeric paper meets sugar water. What happens? (a) turns reddish-brown (b) stays yellow
39. 39.📘 The browning of lemon juice with heat is a ___ change. (a) chemical (b) magnetic (c) physical (d) musical
40. 40.🧺 Which of these is needed for the muddy water filter? (a) a battery cell (b) a mirror (c) yeast (d) muddy water

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