Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 815 · 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) plain water (b) salt water (c) sugar water (d) vinegar
2. 2.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) a clean glass (b) sand and pebbles (c) yeast (d) muddy water
3. 3.🌱 Which of these is needed for a seed to sprout? (a) sunlight (b) water (c) salt (d) soil
4. 4.🫗 How do we separate bad grains from rice? (a) winnowing (b) handpicking (c) sieving (d) evaporating
5. 5.True or false: sand and pebbles is needed for the muddy water filter. (a) False (b) True
6. 6.🔮 Predict: sprouts grow in the dark for a week. What colour are their leaves? (a) bright red (b) pale yellow (c) blue (d) dark green
7. 7.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the same bottles is the one thing we change. (a) False (b) True
8. 8.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the turmeric paper (b) the colour we see (c) the liquid we test
9. 9.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a small bottle (c) a magnet (d) sugar
10. 10.🫧 Is vinegar an acid, a base or neutral? (a) an acid (b) neutral (c) a base
11. 11.🧺 Which of these is needed for the secret lemon message? (a) a cotton bud (b) a magnet (c) a battery cell (d) a mirror
12. 12.🍞 Where is yeast used in the kitchen? (a) to wash dishes (b) to make bread rise (c) to colour rice (d) to clean floors
13. 13.🔍 Muddy water is left still for an hour. What happens to the mud? (a) it dissolves (b) it turns to sand (c) it sinks to the bottom (d) it floats on top
14. 14.🍞 Does yeast need sunlight to make gas? (a) yeast needs it (b) yeast does not need it
15. 15.🧺 Do we need a magnet for growing salt crystals? (a) needed (b) not needed
16. 16.🔮 Predict: you use plain water instead of vinegar. What happens? (a) a huge eruption (b) very little fizzing (c) it turns to honey (d) the balloon bursts
17. 17.🛟 Why must the jar lid be screwed on tightly? (a) so it turns yellow (b) so cream does not spill (c) so air gets out (d) so it gets hot
18. 18.True or false: a piece of string is needed for growing salt crystals. (a) True (b) False
19. 19.True or false: freezing water is a change that cannot be undone. (a) True (b) False
20. 20.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is the one thing we change? (a) the same bottle (b) spoons of baking soda (c) the amount of vinegar (d) size of the balloon
21. 21.🧈 Can this change be undone: cooking an egg? (a) can be undone (b) cannot be undone
22. 22.🔮 Predict: seeds on wet cotton are kept in the freezer. What happens? (a) they do not sprout (b) they grow fruit (c) they sprout faster (d) they glow
23. 23.🫗 Which of these is done by sieving? (a) tea leaves from tea (b) chaff from wheat grain (c) sugar from sugar water (d) bran from wheat flour
24. 24.🪴 Which part of a plant does this job: carry water upward? (a) leaves (b) stem (c) roots (d) flower
25. 25.🔮 Predict: the adult irons for only one second. What happens? (a) it gets darker (b) the paper floats (c) writing stays faint (d) writing turns green
26. 26.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) a clean glass (b) cotton or cloth (c) a funnel (d) a balloon
27. 27.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of sugar is what we measure. (a) False (b) True
28. 28.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the filter material is kept the same. (a) True (b) False
29. 29.True or false: sunlight is something yeast does not need. (a) False (b) True
30. 30.🔍 Which is the odd one out? (a) warmth (b) air (c) sunlight (d) water
31. 31.🫧 Which of these is a base? (a) vinegar (b) baking soda water (c) plain water (d) tamarind water
32. 32.🧈 Can this change be undone: melting ice? (a) cannot be undone (b) can be undone
33. 33.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: the cream temperature is what we measure. (a) False (b) True
34. 34.🌱 Is water needed for a seed to sprout? (a) needed to sprout (b) not needed to sprout
35. 35.🔍 Which is the odd one out? (a) water (b) warmth (c) sugar (d) air
36. 36.True or false: seeds on dry cotton sprouts in a few days. (a) True (b) False
37. 37.🧈 Can this change be undone: rusting iron? (a) cannot be undone (b) can be undone
38. 38.⚖️ Fair test — do seeds need water to sprout? What do we do with “wet or dry cotton”? (a) we change it (b) we keep it the same (c) we measure it
39. 39.True or false: gravel from fine sand is done by sieving. (a) False (b) True
40. 40.True or false: small pebbles dissolves in water. (a) True (b) False

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