Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 793 · 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.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a seed (b) baking soda (c) vinegar (d) a tray for spills
2. 2.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is what we measure? (a) the amount of cream (b) how hard we shake (c) time to make butter (d) the cream temperature
3. 3.🌱 Is soil needed for a seed to sprout? (a) not needed to sprout (b) needed to sprout
4. 4.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) an empty bottle (b) a magnet (c) a balloon (d) a funnel or spoon
5. 5.🍞 Does yeast need sunlight to make gas? (a) yeast does not need it (b) yeast needs it
6. 6.🧺 Do we need dry yeast for the yeast balloon? (a) needed (b) not needed
7. 7.🍋 Secret message: who does this step — letting the paper dry? (a) a child can do it (b) an adult does it
8. 8.🌱 Seeds need water, air and ___ to sprout. (a) salt (b) warmth (c) soil (d) sugar
9. 9.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) a battery cell (b) water (c) a few days (d) moong seeds
10. 10.🍋 Secret message: who does this step — ironing the paper? (a) a child can do it (b) an adult does it
11. 11.📘 The browning of lemon juice with heat is a ___ change. (a) magnetic (b) musical (c) chemical (d) physical
12. 12.🧺 Which of these is needed for the turmeric test? (a) a balloon (b) water (c) yeast (d) a battery cell
13. 13.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is the one thing we change? (a) spoons of baking soda (b) the amount of vinegar (c) the same bottle (d) the kind of balloon
14. 14.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a mirror (c) a piece of string (d) warm water
15. 15.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the turmeric paper (b) the liquid we test (c) the colour we see
16. 16.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) dry yeast (c) sugar (d) a battery cell
17. 17.True or false: turmeric powder is needed for sprouting seeds. (a) True (b) False
18. 18.🛟 Why must the jar lid be screwed on tightly? (a) so it gets hot (b) so cream does not spill (c) so it turns yellow (d) so air gets out
19. 19.📘 Leaves have tiny holes that let out water vapour. What are they called? (a) stomata (b) veins (c) petals (d) roots
20. 20.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a jar with a tight lid (b) turmeric powder (c) fresh cream (d) cold water to rinse
21. 21.🔮 Predict: tea is poured through a strainer. What happens to the tea leaves? (a) leaves pass through (b) both stay behind (c) leaves stay behind (d) tea stays behind
22. 22.🫧 Which of these is a base? (a) orange juice (b) salt water (c) tamarind water (d) detergent water
23. 23.True or false: sugar is not needed for the yeast balloon. (a) True (b) False
24. 24.🧺 Do we need cotton wool for sprouting seeds? (a) needed (b) not needed
25. 25.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) a balloon (c) a battery cell (d) a piece of string
26. 26.🧺 Do we need cold water to rinse for making butter? (a) not needed (b) needed
27. 27.🫗 Is filtered pond water safe to drink? (a) yes, if it is cold (b) no, germs may stay (c) yes, always (d) yes, if it is clear
28. 28.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? Which of these is the one thing we change? (a) the kind of plant (b) sun or shade (c) the time we wait (d) the size of the plant
29. 29.🛟 Which safety rule fits the fizzy balloon experiment? (a) keep it away from eyes (b) put it in your mouth (c) seal it in a glass jar (d) shake it near your face
30. 30.🪴 Which part of a plant does this job: hold up the leaves? (a) flower (b) leaves (c) roots (d) stem
31. 31.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the colour we see (b) the turmeric paper (c) the liquid we test (d) the number of drops
32. 32.🔮 Predict: seeds on wet cotton are kept in a dark cupboard. Will they sprout? (a) yes, they sprout (b) no, never (c) they turn to stones (d) they melt
33. 33.True or false: turmeric powder is needed for the leafy bag test. (a) True (b) False
34. 34.True or false: plain water turns turmeric reddish-brown. (a) False (b) True
35. 35.⚖️ 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 yeast (c) the same bottles (d) the water temperature
36. 36.True or false: cutting the lemon is a job a child can do. (a) True (b) False
37. 37.🛟 After the yeast experiment, what should you do with the mixture? (a) pour it down the sink (b) put it in your mouth (c) throw it at a wall (d) keep it for a month
38. 38.🧺 Which of these is needed for the muddy water filter? (a) turmeric powder (b) a balloon (c) a clean glass (d) a magnet
39. 39.🫧 Which of these is an acid? (a) curd (b) plain water (c) detergent water (d) soap solution
40. 40.⚖️ 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

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