Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 247 · 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.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) a friend who is running (c) nobody needs to (d) a grown-up
2. 2.⚖️ 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 amount of sugar (b) the amount of water (c) the water temperature (d) the amount of yeast
3. 3.True or false: water is needed for sprouting seeds. (a) True (b) False
4. 4.🧺 Which of these is not needed for making butter? (a) a bowl (b) a mirror (c) fresh cream (d) cold water to rinse
5. 5.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a magnet (b) warm water (c) a shallow dish (d) a piece of string
6. 6.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
7. 7.📘 What do we call a seed starting to grow? (a) condensation (b) pollination (c) evaporation (d) germination
8. 8.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) a mirror (c) yeast (d) warm water
9. 9.⚖️ Fair test — do seeds need water to sprout? True or false: the same bowls is what we measure. (a) True (b) False
10. 10.🫧 Which of these is an acid? (a) tamarind water (b) salt water (c) detergent water (d) plain water
11. 11.🧺 Do we need cold water to rinse for making butter? (a) not needed (b) needed
12. 12.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) a battery cell (b) a small bowl (c) water (d) a few days
13. 13.🍋 What colour does the lemon writing turn when an adult warms it? (a) white (b) brown (c) green (d) blue
14. 14.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) browning lemon ink (c) melting ice (d) rusting iron
15. 15.🛟 After the yeast experiment, what should you do with the mixture? (a) pour it down the sink (b) throw it at a wall (c) keep it for a month (d) put it in your mouth
16. 16.🫧 Which of these is an acid? (a) curd (b) baking soda water (c) plain water (d) soap solution
17. 17.🍞 Which of these is something yeast needs? (a) sunlight (b) time (c) salt (d) vinegar
18. 18.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a cotton bud (b) a small bowl (c) turmeric powder (d) lemon juice
19. 19.True or false: dipping the cotton bud is a job for an adult. (a) True (b) False
20. 20.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we keep it the same (b) we change it (c) we measure it
21. 21.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a few hours (b) a clear plastic bag (c) yeast (d) sunlight
22. 22.True or false: plain water is a base. (a) False (b) True
23. 23.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the kind of juice is what we measure. (a) False (b) True
24. 24.🫧 What do you see when baking soda meets vinegar? (a) it turns to ice (b) nothing at all (c) it glows in the dark (d) lots of fizzy bubbles
25. 25.🔍 Which is the odd one out? (a) browning lemon ink (b) baking a cake (c) rusting iron (d) melting ice
26. 26.🧺 Which of these is needed for the fizzy balloon? (a) vinegar (b) sugar (c) a seed (d) a mirror
27. 27.🍋 Secret message: who does this step — writing the message? (a) a child can do it (b) an adult does it
28. 28.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) cotton or cloth (b) a mirror (c) muddy water (d) a clean glass
29. 29.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the kind of balloon”? (a) we change it (b) we measure it (c) we keep it the same
30. 30.🍞 Why do we add sugar to the yeast? (a) to make it sweet (b) to colour it (c) it is food for yeast (d) to make it heavy
31. 31.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we change it (b) we keep it the same (c) we measure it
32. 32.True or false: a seed is not needed for the fizzy balloon. (a) False (b) True
33. 33.True or false: yeast is not needed for the leafy bag test. (a) True (b) False
34. 34.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it turns blue (b) it stays yellow (c) it turns black (d) it turns red
35. 35.🍋 Secret message: who does this step — cutting the lemon? (a) an adult does it (b) a child can do it
36. 36.🫗 How do we separate bran from wheat flour? (a) sieving (b) handpicking (c) evaporating (d) winnowing
37. 37.True or false: bad grains from rice is done by handpicking. (a) False (b) True
38. 38.🔍 Which is the odd one out? (a) letting the paper dry (b) plugging in the iron (c) putting the iron away (d) cutting the lemon
39. 39.🧺 Do we need an adult with an iron for the secret lemon message? (a) needed (b) not needed
40. 40.True or false: fresh cream is needed for making butter. (a) True (b) False

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