Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 982 · 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 a cloth filter or a cotton filter give clearer water? Which of these is kept the same? (a) the filter material (b) the amount poured (c) how clear the water is
2. 2.True or false: a magnet is not needed for growing salt crystals. (a) True (b) False
3. 3.🧺 Do we need a battery cell for sprouting seeds? (a) not needed (b) needed
4. 4.🫗 How do we separate husk from rice grain? (a) handpicking (b) sieving (c) winnowing (d) evaporating
5. 5.🔮 Predict: you use plain water instead of vinegar. What happens? (a) very little fizzing (b) a huge eruption (c) the balloon bursts (d) it turns to honey
6. 6.🧈 Can this change be undone: baking a cake? (a) can be undone (b) cannot be undone
7. 7.🛟 Who should use the hot iron in the secret message experiment? (a) any child (b) only an adult (c) whoever is fastest (d) the youngest child
8. 8.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) vinegar (b) baking soda (c) a funnel or spoon (d) a seed
9. 9.🔮 Predict: a plant gets no water for many days in summer. What happens? (a) it flowers more (b) it grows faster (c) it turns blue (d) it wilts and droops
10. 10.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: how clear the water is is what we measure. (a) False (b) True
11. 11.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) warm water (c) dry yeast (d) turmeric powder
12. 12.🍞 Does yeast need a magnet to make gas? (a) yeast needs it (b) yeast does not need it
13. 13.🟡 Turmeric paper meets plain water. What happens? (a) stays yellow (b) turns reddish-brown
14. 14.🧺 Which of these is not needed for sprouting seeds? (a) a balloon (b) a small bowl (c) a few days (d) moong seeds
15. 15.🔍 Which is the odd one out? (a) baking soda (b) sand (c) sugar (d) food colour
16. 16.🍋 Secret message: who does this step — letting the paper dry? (a) an adult does it (b) a child can do it
17. 17.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of sugar is the one thing we change. (a) False (b) True
18. 18.🍞 Which of these is something yeast needs? (a) a magnet (b) sunlight (c) vinegar (d) time
19. 19.🔍 Which is the odd one out? (a) melting butter (b) rusting iron (c) browning lemon ink (d) baking a cake
20. 20.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the light we look in”? (a) we measure it (b) we change it (c) we keep it the same
21. 21.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) size of the balloon (b) the water temperature (c) the amount of water (d) the amount of yeast
22. 22.🫗 How do we separate sugar from sugar water? (a) filtering (b) winnowing (c) sieving (d) evaporating
23. 23.🧺 Which of these is needed for growing salt crystals? (a) warm water (b) a balloon (c) a mirror (d) a battery cell
24. 24.⚖️ 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
25. 25.True or false: turmeric powder is needed for the leafy bag test. (a) False (b) True
26. 26.🟡 Turmeric paper meets tamarind water. What happens? (a) turns reddish-brown (b) stays yellow
27. 27.🫧 Which of these is neutral? (a) soap solution (b) lemon juice (c) sugar water (d) orange juice
28. 28.🟡 Turmeric paper meets detergent water. What happens? (a) stays yellow (b) turns reddish-brown
29. 29.True or false: air is not needed for a seed to sprout. (a) True (b) False
30. 30.True or false: vinegar is something yeast needs. (a) True (b) False
31. 31.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) white paper strips (c) lemon juice (d) a mirror
32. 32.🧺 Do we need yeast for the turmeric test? (a) not needed (b) needed
33. 33.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: sun or shade is the one thing we change. (a) False (b) True
34. 34.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “amount of water drops”? (a) we keep it the same (b) we measure it (c) we change it
35. 35.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? Which of these is what we measure? (a) sun or shade (b) the time we wait (c) amount of water drops (d) the same kind of bag
36. 36.🎈 Why does the balloon blow up? (a) the bottle shrinks (b) vinegar is hot (c) gas is made inside (d) outside air gets in
37. 37.🧂 Does sand dissolve in water? (a) dissolves in water (b) does not dissolve
38. 38.🔍 Which is the odd one out? (a) lemon juice (b) curd (c) baking soda water (d) orange juice
39. 39.🔍 What do you see after shaking cream in a jar for a long time? (a) bubbles of gas (b) lumps of butter (c) sugar crystals (d) clear water only
40. 40.🛟 Why is a plastic jar a good choice for shaking? (a) it is heavier (b) it is hotter (c) it is magnetic (d) it will not break

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