Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 646 · 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.🔍 Which is the odd one out? (a) reading the message (b) letting the paper dry (c) dipping the cotton bud (d) ironing the paper
2. 2.🍞 Does yeast need sugar to make gas? (a) yeast does not need it (b) yeast needs it
3. 3.🌱 Seeds need water, air and ___ to sprout. (a) salt (b) warmth (c) soil (d) sugar
4. 4.True or false: seeds in the freezer does not sprout. (a) True (b) False
5. 5.🛟 Why should you never drink water just because it looks clear? (a) germs are invisible (b) clear water is salty (c) clear water is hot (d) clear water is sweet
6. 6.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: the size of the plant is kept the same. (a) False (b) True
7. 7.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a jar with a tight lid (b) cold water to rinse (c) a magnet (d) a bowl
8. 8.True or false: a paper clip is not needed for the yeast balloon. (a) True (b) False
9. 9.🧂 Which of these dissolves in water? (a) table salt (b) small pebbles (c) chalk powder (d) cooking oil
10. 10.🧺 Which of these is not needed for the yeast balloon? (a) warm water (b) dry yeast (c) a balloon (d) a battery cell
11. 11.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the kind of juice is kept the same. (a) True (b) False
12. 12.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is the one thing we change. (a) False (b) True
13. 13.True or false: cutting the lemon is a job for an adult. (a) False (b) True
14. 14.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the same paper is what we measure. (a) False (b) True
15. 15.🛟 Who should pour the warm water for the crystal experiment? (a) a grown-up (b) a friend who is running (c) nobody needs to (d) the youngest child
16. 16.True or false: seeds in the freezer sprouts in a few days. (a) False (b) True
17. 17.🧺 Which of these is not needed for the turmeric test? (a) lemon juice (b) a comb (c) turmeric powder (d) water
18. 18.🛟 The water for the yeast should be ___. (a) ice cold (b) boiling hot (c) warm, not hot (d) very salty
19. 19.⚖️ Fair test — do seeds need water to sprout? True or false: the kind of seeds is what we measure. (a) True (b) False
20. 20.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a spoon (c) warm water (d) a balloon
21. 21.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) on the edge of a table (c) next to the baby (d) safe from small children
22. 22.🍞 Which of these is something yeast needs? (a) warm water (b) salt (c) sunlight (d) vinegar
23. 23.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) a battery cell (c) a piece of string (d) warm water
24. 24.True or false: bad grains from rice is done by handpicking. (a) False (b) True
25. 25.🌱 Why do the seeds on dry cotton not sprout? (a) they are too wet (b) they have no water (c) they have no soil (d) they have no salt
26. 26.🟡 Which of these keeps turmeric yellow? (a) lemon juice (b) detergent water (c) soap solution (d) baking soda water
27. 27.🔍 Which is the odd one out? (a) baking soda (b) sawdust (c) cooking oil (d) sand
28. 28.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) a battery cell (c) white paper strips (d) turmeric powder
29. 29.True or false: husk from rice grain is done by winnowing. (a) False (b) True
30. 30.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is kept the same? (a) time to make butter (b) how hard we shake (c) the cream temperature
31. 31.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) the same dish (b) the amount of salt (c) days to see crystals (d) the kind of salt
32. 32.🧺 Do we need a potted plant for the leafy bag test? (a) not needed (b) needed
33. 33.🍞 Which of these is something yeast needs? (a) vinegar (b) sugar (c) a magnet (d) sunlight
34. 34.🫧 Is detergent water an acid, a base or neutral? (a) a base (b) an acid (c) neutral
35. 35.🍋 Which of these steps is a job for an adult? (a) writing the message (b) putting the iron away (c) dipping the cotton bud (d) letting the paper dry
36. 36.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) muddy water (b) a funnel (c) turmeric powder (d) sand and pebbles
37. 37.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) a balloon (b) cotton or cloth (c) muddy water (d) a clean glass
38. 38.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a spoon (c) a piece of string (d) a magnet
39. 39.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a magnet (b) sunlight (c) a rubber band (d) a potted plant
40. 40.🪴 Which part of a plant does this job: take in water from soil? (a) flower (b) roots (c) stem (d) leaves

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