Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 524 · 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: a magnet is needed for growing salt crystals. (a) False (b) True
2. 2.True or false: browning lemon ink is a change that can be undone. (a) True (b) False
3. 3.🔮 Predict: you shake skimmed milk (with almost no cream) instead. What happens? (a) it turns to cheese (b) no butter forms (c) more butter forms (d) it turns blue
4. 4.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the kind of juice is the one thing we change. (a) True (b) False
5. 5.🔮 Predict: you tie a bag on a branch with no leaves. Will it collect much water? (a) exactly the same (b) much less water (c) much more water (d) it fills with soil
6. 6.🛟 Why must children keep their fingers away from the iron? (a) it can burn skin (b) it is sticky (c) it is cold (d) it is magnetic
7. 7.🛟 What should you do if vinegar splashes in your eye? (a) rub it hard (b) ignore it (c) add baking soda (d) rinse with clean water
8. 8.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) white paper strips (c) water (d) yeast
9. 9.True or false: a jar with a tight lid is needed for making butter. (a) True (b) False
10. 10.🟡 Turmeric paper meets tamarind water. What happens? (a) turns reddish-brown (b) stays yellow
11. 11.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: how clear the water is is what we measure. (a) True (b) False
12. 12.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is what we measure? (a) the kind of juice (b) the same cotton bud (c) how dark the writing is (d) the ironing time
13. 13.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “size of the balloon”? (a) we keep it the same (b) we change it (c) we measure it
14. 14.🧺 Which of these is not needed for the fizzy balloon? (a) vinegar (b) a funnel or spoon (c) an empty bottle (d) a seed
15. 15.⚖️ Fair test — do seeds need water to sprout? What do we do with “how many seeds sprout”? (a) we measure it (b) we keep it the same (c) we change it
16. 16.🛟 Why should you never drink water just because it looks clear? (a) clear water is hot (b) clear water is salty (c) clear water is sweet (d) germs are invisible
17. 17.🫗 How do we separate salt from sea water? (a) sieving (b) filtering (c) winnowing (d) evaporating
18. 18.⚖️ 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 what we measure. (a) True (b) False
19. 19.🔮 Predict: you use more vinegar and more baking soda. What happens to the balloon? (a) it shrinks (b) it turns blue (c) there is no change (d) it grows bigger
20. 20.🧺 Do we need a comb for the yeast balloon? (a) not needed (b) needed
21. 21.🌱 Which of these does not sprout? (a) seeds on wet cotton (b) wet seeds in the dark (c) wet seeds by a window (d) boiled seeds
22. 22.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the liquid we test (b) the colour we see (c) the light we look in (d) the turmeric paper
23. 23.🌱 Which of these is needed for a seed to sprout? (a) salt (b) soil (c) air (d) sunlight
24. 24.🧺 Which of these is needed for the muddy water filter? (a) turmeric powder (b) a mirror (c) a clean glass (d) a battery cell
25. 25.🔮 Predict: you write with plain water instead of lemon juice. What appears after ironing? (a) blue words (b) dark brown words (c) a rainbow (d) almost nothing
26. 26.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is kept the same? (a) the same funnel (b) the filter material (c) how clear the water is
27. 27.🫗 How do we separate small stones from dal? (a) winnowing (b) handpicking (c) sieving (d) filtering
28. 28.📘 The browning of lemon juice with heat is a ___ change. (a) magnetic (b) musical (c) physical (d) chemical
29. 29.🟡 Turmeric paper meets baking soda water. What happens? (a) turns reddish-brown (b) stays yellow
30. 30.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the amount of salt”? (a) we measure it (b) we keep it the same (c) we change it
31. 31.🛟 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
32. 32.True or false: lemon juice is needed for the turmeric test. (a) False (b) True
33. 33.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is kept the same? (a) the kind of balloon (b) spoons of baking soda (c) size of the balloon
34. 34.🔮 Predict: which gives more drops in the bag — a hot sunny day or a cool cloudy day? (a) the cool cloudy day (b) both the same (c) the hot sunny day (d) neither of them
35. 35.🔍 Which is the odd one out? (a) plugging in the iron (b) writing the message (c) dipping the cotton bud (d) reading the message
36. 36.🧂 Why do we stir in salt until no more will dissolve? (a) to change its colour (b) to make it very salty (c) to cool the water (d) to make it fizz
37. 37.🧈 Can this change be undone: baking a cake? (a) can be undone (b) cannot be undone
38. 38.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) water (c) a mirror (d) lemon juice
39. 39.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed
40. 40.🧈 Can this change be undone: rusting iron? (a) cannot be undone (b) can be undone

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