Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 496 · 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.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: size of the balloon is what we measure. (a) False (b) True
2. 2.🔍 Which is the odd one out? (a) orange juice (b) tamarind water (c) sugar water (d) lemon juice
3. 3.🧈 What is the watery liquid left after the butter forms? (a) buttermilk (b) honey (c) oil (d) vinegar
4. 4.🔮 Predict: seeds on wet cotton are kept in a dark cupboard. Will they sprout? (a) yes, they sprout (b) they melt (c) they turn to stones (d) no, never
5. 5.🧺 Do we need warm water for the yeast balloon? (a) not needed (b) needed
6. 6.🧺 Which of these is not needed for the fizzy balloon? (a) baking soda (b) vinegar (c) a comb (d) a funnel or spoon
7. 7.🫗 Which of these is done by sieving? (a) bran from wheat flour (b) small stones from dal (c) sugar from sugar water (d) chaff from wheat grain
8. 8.🛟 What should you do after handling muddy water? (a) lick your fingers (b) nothing is needed (c) wipe hands on face (d) wash hands afterwards
9. 9.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) bigger crystals (c) liquid crystals (d) no crystals
10. 10.True or false: baking soda is needed for the fizzy balloon. (a) False (b) True
11. 11.🍞 Which of these is something yeast needs? (a) salt (b) sunlight (c) a magnet (d) sugar
12. 12.True or false: bad grains from rice is done by handpicking. (a) False (b) True
13. 13.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) the water temperature (b) the amount of yeast (c) the amount of water (d) size of the balloon
14. 14.🧺 Do we need a mirror for making butter? (a) needed (b) not needed
15. 15.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the filter material is the one thing we change. (a) False (b) True
16. 16.🟡 Which of these turns turmeric reddish-brown? (a) vinegar (b) lemon juice (c) plain water (d) soap solution
17. 17.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the water temperature is the one thing we change. (a) True (b) False
18. 18.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a cotton bud (b) lemon juice (c) a small bowl (d) yeast
19. 19.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) a comb (c) warm water (d) dry yeast
20. 20.🧂 Which of these dissolves in water? (a) small pebbles (b) glucose powder (c) sawdust (d) chalk powder
21. 21.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the turmeric paper (b) the light we look in (c) the colour we see (d) the liquid we test
22. 22.🧂 Which of these dissolves in water? (a) sand (b) sawdust (c) small pebbles (d) sugar
23. 23.True or false: lemon juice is not needed for the secret lemon message. (a) True (b) False
24. 24.True or false: mud from water is done by filtering. (a) True (b) False
25. 25.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is kept the same. (a) False (b) True
26. 26.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) on the edge of a table (c) next to the baby (d) safe from small children
27. 27.True or false: give out water vapour is a job of the roots. (a) True (b) False
28. 28.🔮 The fizzing stops after a while. Why? (a) an ingredient ran out (b) the bottle got tired (c) the balloon got cold (d) the gas froze
29. 29.🫗 Muddy water is poured through a cloth filter. What stays on the cloth? (a) the salt (b) the water (c) nothing (d) the mud
30. 30.True or false: a funnel is needed for the muddy water filter. (a) True (b) False
31. 31.🔮 Predict: you stop shaking after only one minute. What do you have? (a) butter lumps (b) cheese (c) still runny cream (d) ghee
32. 32.🍞 Why do we add sugar to the yeast? (a) to colour it (b) to make it heavy (c) to make it sweet (d) it is food for yeast
33. 33.⚖️ 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 time we wait (b) the kind of plant (c) amount of water drops (d) sun or shade
34. 34.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: spoons of baking soda is the one thing we change. (a) False (b) True
35. 35.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a mirror (b) soap solution (c) white paper strips (d) a dropper or spoon
36. 36.🧺 Do we need a battery cell for the leafy bag test? (a) needed (b) not needed
37. 37.True or false: time is something yeast does not need. (a) False (b) True
38. 38.🧂 Which of these does not dissolve in water? (a) sugar (b) cooking oil (c) food colour (d) baking soda
39. 39.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it grows faster (b) it glows (c) the yeast is killed (d) it turns to sugar
40. 40.🍋 Which of these steps is a job a child can do? (a) putting the iron away (b) ironing the paper (c) reading the message (d) cutting the lemon

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