Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 665 · 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 kept the same? (a) spoons of baking soda (b) the kind of balloon (c) size of the balloon
2. 2.🧂 Does sawdust dissolve in water? (a) does not dissolve (b) dissolves in water
3. 3.🛟 Turmeric stains clothes. What should you wear? (a) a white party dress (b) your best clothes (c) an old shirt or apron (d) your school uniform
4. 4.True or false: boiled seeds does not sprout. (a) True (b) False
5. 5.🧺 Which of these is not needed for the muddy water filter? (a) a battery cell (b) muddy water (c) a clean glass (d) sand and pebbles
6. 6.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) sunlight (b) a magnet (c) a few hours (d) a clear plastic bag
7. 7.🧺 Do we need warm water for growing salt crystals? (a) not needed (b) needed
8. 8.⚖️ 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 light we look in (c) the turmeric paper (d) the liquid we test
9. 9.🧺 Do we need a balloon for the fizzy balloon? (a) needed (b) not needed
10. 10.🧈 Can this change be undone: melting butter? (a) can be undone (b) cannot be undone
11. 11.True or false: take in water from soil is a job of the flower. (a) True (b) False
12. 12.🍋 Secret message: who does this step — plugging in the iron? (a) an adult does it (b) a child can do it
13. 13.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) reddish-brown (b) bright blue (c) it stays white (d) green
14. 14.🧺 Do we need yeast for growing salt crystals? (a) not needed (b) needed
15. 15.🛟 Why must the jar lid be screwed on tightly? (a) so it gets hot (b) so cream does not spill (c) so air gets out (d) so it turns yellow
16. 16.🔍 Which is the odd one out? (a) baking soda water (b) detergent water (c) tamarind water (d) soap solution
17. 17.True or false: a balloon is needed for growing salt crystals. (a) True (b) False
18. 18.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the kind of juice”? (a) we keep it the same (b) we measure it (c) we change it
19. 19.🧺 Which of these is not needed for the fizzy balloon? (a) a seed (b) a funnel or spoon (c) a tray for spills (d) baking soda
20. 20.🔮 Predict: seeds on wet cotton are kept in a dark cupboard. Will they sprout? (a) no, never (b) they melt (c) they turn to stones (d) yes, they sprout
21. 21.🌱 Will these sprout: boiled seeds? (a) does not sprout (b) sprouts
22. 22.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is kept the same? (a) the filter material (b) how clear the water is (c) the same funnel
23. 23.🫗 How do we separate bran from wheat flour? (a) winnowing (b) handpicking (c) sieving (d) filtering
24. 24.🛟 Why is a plastic jar a good choice for shaking? (a) it is hotter (b) it is magnetic (c) it will not break (d) it is heavier
25. 25.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) cotton or cloth (b) a magnet (c) a funnel (d) sand and pebbles
26. 26.🔮 The fizzing stops after a while. Why? (a) the bottle got tired (b) the gas froze (c) the balloon got cold (d) an ingredient ran out
27. 27.🧺 Do we need a potted plant for the leafy bag test? (a) needed (b) not needed
28. 28.True or false: a timer is not needed for making butter. (a) True (b) False
29. 29.🛟 Why should you never drink water just because it looks clear? (a) clear water is sweet (b) clear water is salty (c) germs are invisible (d) clear water is hot
30. 30.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is the one thing we change? (a) size of the balloon (b) the amount of vinegar (c) the same bottle (d) spoons of baking soda
31. 31.True or false: turmeric powder is needed for making butter. (a) True (b) False
32. 32.🧺 Which of these is not needed for sprouting seeds? (a) a few days (b) cotton wool (c) a balloon (d) water
33. 33.🔍 Which is the odd one out? (a) reading the message (b) writing the message (c) cutting the lemon (d) dipping the cotton bud
34. 34.True or false: reading the message is a job a child can do. (a) False (b) True
35. 35.⚖️ Fair test — do seeds need water to sprout? Which of these is what we measure? (a) how many seeds sprout (b) the kind of seeds (c) the number of seeds (d) wet or dry cotton
36. 36.⚖️ 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 keep it the same (b) we change it (c) we measure it
37. 37.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the same cotton bud”? (a) we keep it the same (b) we measure it (c) we change it
38. 38.🧺 Do we need cold water to rinse for making butter? (a) needed (b) not needed
39. 39.🍋 What colour does the lemon writing turn when an adult warms it? (a) green (b) brown (c) white (d) blue
40. 40.True or false: husk from rice grain is done by winnowing. (a) True (b) False

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