Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 926 · 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.True or false: make seeds is a job of the flower. (a) False (b) True
2. 2.🔮 Predict: a plant gets no water for many days in summer. What happens? (a) it turns blue (b) it flowers more (c) it grows faster (d) it wilts and droops
3. 3.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) safe from small children (c) in a busy doorway (d) next to the baby
4. 4.🔍 Which is the odd one out? (a) browning lemon ink (b) melting ice (c) milk turning to curd (d) cooking an egg
5. 5.🧈 Which of these is a change that can be undone? (a) baking a cake (b) rusting iron (c) browning lemon ink (d) melting ice
6. 6.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the colour we see (b) the liquid we test (c) the number of drops
7. 7.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) yeast (c) a battery cell (d) a spoon
8. 8.⚖️ Fair test — do seeds need water to sprout? What do we do with “wet or dry cotton”? (a) we measure it (b) we keep it the same (c) we change it
9. 9.🫗 How do we separate husk from rice grain? (a) filtering (b) handpicking (c) winnowing (d) evaporating
10. 10.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) cotton or cloth (b) a clean glass (c) sand and pebbles (d) yeast
11. 11.⚖️ 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) sun or shade (b) the size of the plant (c) the same kind of bag (d) amount of water drops
12. 12.True or false: curd is neutral. (a) True (b) False
13. 13.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a balloon (b) a funnel or spoon (c) baking soda (d) sugar
14. 14.🧂 Does sugar dissolve in water? (a) dissolves in water (b) does not dissolve
15. 15.🧺 Which of these is not needed for the turmeric test? (a) water (b) white paper strips (c) a mirror (d) lemon juice
16. 16.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the same cotton bud”? (a) we measure it (b) we change it (c) we keep it the same
17. 17.🌱 Is sugar needed for a seed to sprout? (a) not needed to sprout (b) needed to sprout
18. 18.🫧 Is lemon juice an acid, a base or neutral? (a) neutral (b) a base (c) an acid
19. 19.🍞 Which of these is something yeast does not need? (a) sugar (b) warm water (c) salt (d) time
20. 20.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “how hard we shake”? (a) we measure it (b) we change it (c) we keep it the same
21. 21.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: the same kind of bag is what we measure. (a) False (b) True
22. 22.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is what we measure. (a) True (b) False
23. 23.🧺 Do we need a battery cell for sprouting seeds? (a) needed (b) not needed
24. 24.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “spoons of baking soda”? (a) we change it (b) we keep it the same (c) we measure it
25. 25.🛟 Why is a plastic jar a good choice for shaking? (a) it is magnetic (b) it will not break (c) it is hotter (d) it is heavier
26. 26.🔮 Can the brown writing go back to being invisible? (a) yes, in the dark (b) yes, if shaken (c) no, it stays brown (d) yes, if cooled
27. 27.🧺 Which of these is needed for making butter? (a) a mirror (b) yeast (c) turmeric powder (d) a jar with a tight lid
28. 28.⚖️ 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
29. 29.🔮 Predict: you tie a bag on a branch with no leaves. Will it collect much water? (a) it fills with soil (b) much more water (c) exactly the same (d) much less water
30. 30.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the amount of yeast”? (a) we measure it (b) we keep it the same (c) we change it
31. 31.🔮 Predict: you filter salty water through cloth. Does the salt stay on the cloth? (a) it turns to sugar (b) no, salt passes through (c) yes, all of it (d) it turns to sand
32. 32.⚖️ Fair test — do seeds need water to sprout? What do we do with “the kind of seeds”? (a) we measure it (b) we keep it the same (c) we change it
33. 33.🍞 Does yeast need sugar to make gas? (a) yeast needs it (b) yeast does not need it
34. 34.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) no crystals (b) liquid crystals (c) smaller crystals (d) bigger crystals
35. 35.🍋 Secret message: who does this step — ironing the paper? (a) a child can do it (b) an adult does it
36. 36.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) white paper (b) lemon juice (c) an adult with an iron (d) a battery cell
37. 37.True or false: vinegar is neutral. (a) False (b) True
38. 38.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is kept the same? (a) the cream temperature (b) time to make butter (c) the same jar
39. 39.🔮 Predict: which gives more drops in the bag — a hot sunny day or a cool cloudy day? (a) the cool cloudy day (b) neither of them (c) both the same (d) the hot sunny day
40. 40.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) melting ice (c) folding paper (d) rusting iron

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