Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 84 · 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.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) a few days (b) cotton wool (c) turmeric powder (d) a small bowl
2. 2.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the kind of salt”? (a) we measure it (b) we change it (c) we keep it the same
3. 3.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a clear plastic bag (b) a few hours (c) a mirror (d) a rubber band
4. 4.🧂 Why do crystals appear as the dish dries? (a) the dish melts (b) water evaporates (c) salt eats water (d) salt grows roots
5. 5.🫗 Which of these is done by handpicking? (a) bran from wheat flour (b) small stones from dal (c) chaff from wheat grain (d) gravel from fine sand
6. 6.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is the one thing we change? (a) the water temperature (b) the same bottles (c) the amount of yeast (d) the amount of sugar
7. 7.⚖️ 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 change it (b) we measure it (c) we keep it the same
8. 8.True or false: yeast is not needed for the turmeric test. (a) False (b) True
9. 9.🧺 Which of these is not needed for the fizzy balloon? (a) a tray for spills (b) an empty bottle (c) a balloon (d) a magnet
10. 10.🧺 Which of these is not needed for the leafy bag test? (a) yeast (b) a clear plastic bag (c) sunlight (d) a few hours
11. 11.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: time to make butter is what we measure. (a) False (b) True
12. 12.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: the time we wait is the one thing we change. (a) False (b) True
13. 13.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a potted plant (b) a clear plastic bag (c) a few hours (d) vinegar
14. 14.True or false: a balloon is needed for the yeast balloon. (a) True (b) False
15. 15.🌱 Which of these is not needed for a seed to sprout? (a) warmth (b) water (c) air (d) salt
16. 16.⚖️ 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 kind of balloon (c) spoons of baking soda (d) the same bottle
17. 17.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) a battery cell (c) a small bottle (d) turmeric powder
18. 18.🧺 Which of these is needed for the leafy bag test? (a) a battery cell (b) a magnet (c) a few hours (d) vinegar
19. 19.True or false: a balloon is needed for the turmeric test. (a) False (b) True
20. 20.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “how dark the writing is”? (a) we keep it the same (b) we change it (c) we measure it
21. 21.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) a small bowl (b) a few days (c) moong seeds (d) a balloon
22. 22.🧺 Do we need a small bowl for sprouting seeds? (a) not needed (b) needed
23. 23.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we keep it the same (b) we measure it (c) we change it
24. 24.🧺 Which of these is not needed for the fizzy balloon? (a) a balloon (b) baking soda (c) an empty bottle (d) a battery cell
25. 25.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) yeast (b) a few days (c) a small bowl (d) moong seeds
26. 26.🔍 Which is the odd one out? (a) detergent water (b) baking soda water (c) soap solution (d) salt water
27. 27.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the same paper”? (a) we measure it (b) we change it (c) we keep it the same
28. 28.🔮 Predict: the adult irons for only one second. What happens? (a) writing turns green (b) it gets darker (c) the paper floats (d) writing stays faint
29. 29.True or false: a battery cell is not needed for the turmeric test. (a) False (b) True
30. 30.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is what we measure? (a) how dark the writing is (b) the kind of juice (c) the same paper (d) the iron setting
31. 31.🧺 Do we need a few hours for the leafy bag test? (a) needed (b) not needed
32. 32.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “the kind of plant”? (a) we measure it (b) we change it (c) we keep it the same
33. 33.🪴 Which of these is a job of the leaves? (a) carry water upward (b) take in water from soil (c) give out water vapour (d) make seeds
34. 34.🧺 Do we need turmeric powder for the muddy water filter? (a) needed (b) not needed
35. 35.🔍 What do you see after shaking cream in a jar for a long time? (a) bubbles of gas (b) clear water only (c) lumps of butter (d) sugar crystals
36. 36.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) reddish-brown (b) it turns blue (c) it turns green (d) it stays yellow
37. 37.🎈 Why does the balloon blow up? (a) the bottle shrinks (b) vinegar is hot (c) gas is made inside (d) outside air gets in
38. 38.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a battery cell (b) lemon juice (c) a small bowl (d) white paper
39. 39.🧺 Which of these is needed for the muddy water filter? (a) turmeric powder (b) a battery cell (c) muddy water (d) a balloon
40. 40.🧺 Do we need white paper for the secret lemon message? (a) needed (b) not needed

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