Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 73 · 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: a shallow dish is not needed for growing salt crystals. (a) True (b) False
2. 2.🌱 Is water needed for a seed to sprout? (a) not needed to sprout (b) needed to sprout
3. 3.🧺 Which of these is needed for the turmeric test? (a) water (b) yeast (c) a comb (d) a balloon
4. 4.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: spoons of baking soda is what we measure. (a) True (b) False
5. 5.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a few hours (b) a rubber band (c) turmeric powder (d) a clear plastic bag
6. 6.🔮 Predict: seeds on wet cotton are kept in a dark cupboard. Will they sprout? (a) they melt (b) yes, they sprout (c) they turn to stones (d) no, never
7. 7.🧺 Which of these is not needed for the secret lemon message? (a) white paper (b) a balloon (c) a small bowl (d) a cotton bud
8. 8.🧺 Do we need water for the turmeric test? (a) needed (b) not needed
9. 9.🛟 Why must children keep their fingers away from the iron? (a) it is cold (b) it is sticky (c) it can burn skin (d) it is magnetic
10. 10.🧺 Do we need a shallow dish for growing salt crystals? (a) needed (b) not needed
11. 11.⚖️ 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 change it (b) we measure it (c) we keep it the same
12. 12.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is what we measure? (a) the amount of vinegar (b) the same bottle (c) size of the balloon (d) the kind of balloon
13. 13.🔮 Predict: you use plain water instead of vinegar. What happens? (a) it turns to honey (b) the balloon bursts (c) a huge eruption (d) very little fizzing
14. 14.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “the cream temperature”? (a) we keep it the same (b) we measure it (c) we change it
15. 15.🫗 How do we separate mud from water? (a) handpicking (b) sieving (c) winnowing (d) filtering
16. 16.⚖️ 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 same bottles (b) the amount of water (c) the water temperature (d) the amount of yeast
17. 17.🧺 Do we need a cotton bud for the secret lemon message? (a) needed (b) not needed
18. 18.🛟 Turmeric stains clothes. What should you wear? (a) your best clothes (b) a white party dress (c) an old shirt or apron (d) your school uniform
19. 19.🌱 Which of these is not needed for a seed to sprout? (a) air (b) water (c) warmth (d) sugar
20. 20.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “days to see crystals”? (a) we change it (b) we keep it the same (c) we measure it
21. 21.🧺 Which of these is needed for the turmeric test? (a) a balloon (b) a dropper or spoon (c) yeast (d) a battery cell
22. 22.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is kept the same? (a) spoons of baking soda (b) size of the balloon (c) the kind of balloon
23. 23.🧺 Which of these is not needed for growing salt crystals? (a) a magnet (b) warm water (c) a shallow dish (d) a piece of string
24. 24.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of water is what we measure. (a) True (b) False
25. 25.🫗 Is filtered pond water safe to drink? (a) yes, always (b) yes, if it is clear (c) yes, if it is cold (d) no, germs may stay
26. 26.True or false: a mirror is not needed for the fizzy balloon. (a) False (b) True
27. 27.🧺 Which of these is not needed for the secret lemon message? (a) yeast (b) lemon juice (c) an adult with an iron (d) a cotton bud
28. 28.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) it stays white (b) reddish-brown (c) bright blue (d) green
29. 29.True or false: food colour does not dissolve in water. (a) True (b) False
30. 30.🔮 Predict: you stop shaking after only one minute. What do you have? (a) butter lumps (b) ghee (c) still runny cream (d) cheese
31. 31.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) yeast (b) water (c) cotton wool (d) a few days
32. 32.🟡 Why does soap solution change turmeric’s colour? (a) soap is magnetic (b) soap water is a base (c) soap is an acid (d) soap is hot
33. 33.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: the kind of balloon is what we measure. (a) True (b) False
34. 34.🪴 Which part of a plant does this job: hold up the leaves? (a) stem (b) flower (c) roots (d) leaves
35. 35.🍞 Does yeast need sugar to make gas? (a) yeast needs it (b) yeast does not need it
36. 36.True or false: rusting iron is a change that cannot be undone. (a) True (b) False
37. 37.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) cold water to rinse (b) a jar with a tight lid (c) a balloon (d) a timer
38. 38.True or false: a balloon is needed for sprouting seeds. (a) False (b) True
39. 39.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) baking soda (b) an empty bottle (c) a battery cell (d) a funnel or spoon
40. 40.🧈 Which of these is a change that cannot be undone? (a) melting butter (b) browning lemon ink (c) folding paper (d) freezing water

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