Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 657 · 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 of these is a change that cannot be undone? (a) freezing water (b) milk turning to curd (c) melting butter (d) dissolving salt
2. 2.🫧 What do you see when baking soda meets vinegar? (a) it turns to ice (b) it glows in the dark (c) lots of fizzy bubbles (d) nothing at all
3. 3.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is the one thing we change? (a) the kind of juice (b) the iron setting (c) the ironing time (d) how dark the writing is
4. 4.True or false: detergent water keeps turmeric yellow. (a) False (b) True
5. 5.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) moong seeds (b) cotton wool (c) yeast (d) a few days
6. 6.True or false: dipping the cotton bud is a job for an adult. (a) True (b) False
7. 7.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a magnet (b) a spoon (c) salt (d) a shallow dish
8. 8.🔮 Predict: you use plain water instead of vinegar. What happens? (a) a huge eruption (b) it turns to honey (c) very little fizzing (d) the balloon bursts
9. 9.True or false: lemon juice is an acid. (a) False (b) True
10. 10.🔮 Predict: seeds on wet cotton are kept in the freezer. What happens? (a) they do not sprout (b) they sprout faster (c) they grow fruit (d) they glow
11. 11.True or false: plugging in the iron is a job for an adult. (a) True (b) False
12. 12.🫗 Muddy water is poured through a cloth filter. What stays on the cloth? (a) the water (b) the mud (c) nothing (d) the salt
13. 13.🧺 Which of these is needed for making butter? (a) a timer (b) turmeric powder (c) a magnet (d) yeast
14. 14.🔍 Which is the odd one out? (a) dissolving salt (b) melting butter (c) melting ice (d) milk turning to curd
15. 15.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns red (b) it turns black (c) it turns blue (d) it stays yellow
16. 16.True or false: carry water upward is a job of the flower. (a) True (b) False
17. 17.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) salt (c) turmeric powder (d) a piece of string
18. 18.🛟 Some seeds from shops are coated with chemicals. What is the safe rule? (a) throw them at friends (b) never put seeds in mouth (c) eat a few to check (d) feed them to pets
19. 19.🍋 What colour does the lemon writing turn when an adult warms it? (a) white (b) blue (c) brown (d) green
20. 20.🔍 Which is the odd one out? (a) salt (b) warm water (c) sugar (d) time
21. 21.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) white paper (b) lemon juice (c) a cotton bud (d) turmeric powder
22. 22.⚖️ Fair test — do seeds need water to sprout? True or false: the number of seeds is the one thing we change. (a) True (b) False
23. 23.True or false: white paper is needed for the secret lemon message. (a) False (b) True
24. 24.🌱 Which of these is not needed for a seed to sprout? (a) warmth (b) salt (c) air (d) water
25. 25.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) the same dish (b) days to see crystals (c) sunny or shady place
26. 26.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is the one thing we change. (a) False (b) True
27. 27.🧈 Why does shaking cream make butter? (a) the lid is warm (b) shaking adds salt (c) fat bits stick together (d) the jar adds butter
28. 28.🟡 Turmeric paper meets soap solution. What happens? (a) stays yellow (b) turns reddish-brown
29. 29.🔮 Predict: which gives more drops in the bag — a hot sunny day or a cool cloudy day? (a) both the same (b) the hot sunny day (c) neither of them (d) the cool cloudy day
30. 30.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) sand and pebbles (b) a clean glass (c) a magnet (d) a funnel
31. 31.🛟 Why must a plastic bag never go over anyone’s head? (a) it changes colour (b) it can block breathing (c) it is too big (d) it gets wet
32. 32.True or false: sugar is not needed for a seed to sprout. (a) False (b) True
33. 33.🪴 Which part of a plant does this job: carry water upward? (a) leaves (b) flower (c) stem (d) roots
34. 34.🌱 Will these sprout: seeds on wet cotton? (a) sprouts (b) does not sprout
35. 35.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) white paper (b) lemon juice (c) a magnet (d) a small bowl
36. 36.True or false: curd is neutral. (a) False (b) True
37. 37.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the light we look in (b) the colour we see (c) the liquid we test
38. 38.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: the cream temperature is kept the same. (a) True (b) False
39. 39.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the same paper is what we measure. (a) True (b) False
40. 40.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) lemon juice (c) turmeric powder (d) a comb

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