Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 967 · 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 — do seeds need water to sprout? Which of these is what we measure? (a) the same bowls (b) the number of seeds (c) how many seeds sprout (d) the same place
2. 2.🧺 Do we need a mirror for the turmeric test? (a) needed (b) not needed
3. 3.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the iron setting is kept the same. (a) True (b) False
4. 4.🧺 Do we need yeast for the muddy water filter? (a) needed (b) not needed
5. 5.True or false: vinegar keeps turmeric yellow. (a) False (b) True
6. 6.True or false: a few days is not needed for sprouting seeds. (a) False (b) True
7. 7.True or false: a battery cell is needed for growing salt crystals. (a) False (b) True
8. 8.True or false: tamarind water is a base. (a) False (b) True
9. 9.True or false: detergent water keeps turmeric yellow. (a) True (b) False
10. 10.🛟 The water for the yeast should be ___. (a) boiling hot (b) ice cold (c) very salty (d) warm, not hot
11. 11.⚖️ 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) how dark the writing is (c) the same paper
12. 12.🧈 Which of these is a change that can be undone? (a) rusting iron (b) melting ice (c) cooking an egg (d) milk turning to curd
13. 13.True or false: an empty bottle is needed for the fizzy balloon. (a) True (b) False
14. 14.🧺 Which of these is needed for the leafy bag test? (a) a battery cell (b) a mirror (c) a rubber band (d) a magnet
15. 15.🔮 Predict: sprouts grow in the dark for a week. What colour are their leaves? (a) dark green (b) bright red (c) blue (d) pale yellow
16. 16.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the light we look in”? (a) we keep it the same (b) we measure it (c) we change it
17. 17.🌊 How is salt made in salt pans by the sea? (a) sea water evaporates (b) salt rains down (c) sand is ground up (d) fish make it
18. 18.🧺 Which of these is needed for the leafy bag test? (a) a magnet (b) a battery cell (c) turmeric powder (d) a clear plastic bag
19. 19.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “the amount of cream”? (a) we measure it (b) we keep it the same (c) we change it
20. 20.🧺 Which of these is not needed for the secret lemon message? (a) a small bowl (b) a mirror (c) lemon juice (d) white paper
21. 21.⚖️ 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 same bottles (b) the amount of yeast (c) the water temperature (d) the amount of sugar
22. 22.True or false: baking a cake is a change that cannot be undone. (a) False (b) True
23. 23.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a bowl (b) turmeric powder (c) cold water to rinse (d) a jar with a tight lid
24. 24.🫗 How do we separate husk from rice grain? (a) handpicking (b) winnowing (c) sieving (d) evaporating
25. 25.True or false: dissolving salt is a change that cannot be undone. (a) False (b) True
26. 26.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a mirror (b) white paper (c) a cotton bud (d) lemon juice
27. 27.🧺 Which of these is not needed for the turmeric test? (a) turmeric powder (b) a battery cell (c) water (d) a dropper or spoon
28. 28.🧺 Which of these is not needed for the yeast balloon? (a) a paper clip (b) dry yeast (c) sugar (d) a small bottle
29. 29.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we measure it (b) we change it (c) we keep it the same
30. 30.🧺 Do we need a magnet for the leafy bag test? (a) not needed (b) needed
31. 31.🧺 Do we need a mirror for making butter? (a) not needed (b) needed
32. 32.⚖️ Fair test — do seeds need water to sprout? What do we do with “how many seeds sprout”? (a) we keep it the same (b) we change it (c) we measure it
33. 33.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “the time we wait”? (a) we measure it (b) we keep it the same (c) we change it
34. 34.⚖️ Fair test — do seeds need water to sprout? Which of these is the one thing we change? (a) the same bowls (b) wet or dry cotton (c) the kind of seeds (d) how many seeds sprout
35. 35.🧺 Which of these is needed for the fizzy balloon? (a) a battery cell (b) a comb (c) a magnet (d) a balloon
36. 36.📘 What is yeast? (a) a kind of salt (b) a kind of sugar (c) a tiny living fungus (d) a kind of stone
37. 37.🧺 Do we need a mirror for the secret lemon message? (a) needed (b) not needed
38. 38.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) turmeric powder (c) yeast (d) water
39. 39.True or false: lemon juice is an acid. (a) False (b) True
40. 40.🧺 Do we need sugar for the fizzy balloon? (a) not needed (b) needed

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