Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 323 · 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.🧺 Which of these is needed for the secret lemon message? (a) yeast (b) a mirror (c) turmeric powder (d) lemon juice
2. 2.🛟 Which rule keeps the turmeric test safe? (a) mix bathroom cleaners (b) sniff each bottle hard (c) sip each liquid (d) use only kitchen items
3. 3.🛟 Why must the jar lid be screwed on tightly? (a) so it gets hot (b) so air gets out (c) so cream does not spill (d) so it turns yellow
4. 4.🧺 Which of these is needed for making butter? (a) a timer (b) turmeric powder (c) a magnet (d) a battery cell
5. 5.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “size of the balloon”? (a) we keep it the same (b) we change it (c) we measure it
6. 6.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) sugar (c) dry yeast (d) a mirror
7. 7.🧺 Do we need dry yeast for the yeast balloon? (a) not needed (b) needed
8. 8.🫗 How do we separate bad grains from rice? (a) winnowing (b) handpicking (c) evaporating (d) filtering
9. 9.🍞 Which of these is something yeast needs? (a) a magnet (b) salt (c) vinegar (d) sugar
10. 10.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a bowl (b) a jar with a tight lid (c) cold water to rinse (d) yeast
11. 11.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is kept the same? (a) spoons of baking soda (b) the same bottle (c) size of the balloon
12. 12.🧺 Do we need a few days for sprouting seeds? (a) needed (b) not needed
13. 13.True or false: vinegar is a base. (a) True (b) False
14. 14.🪴 Where did the water inside the bag come from? (a) the plastic (b) the rubber band (c) the rain (d) the leaves
15. 15.🫧 Which of these is a base? (a) orange juice (b) vinegar (c) soap solution (d) curd
16. 16.⚖️ 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 measure it (c) we keep it the same
17. 17.🛟 What should you do if vinegar splashes in your eye? (a) ignore it (b) rinse with clean water (c) add baking soda (d) rub it hard
18. 18.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) dissolving salt (c) rusting iron (d) browning lemon ink
19. 19.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it turns yellow (b) it grows much faster (c) it bursts at once (d) it grows very little
20. 20.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? Which of these is kept the same? (a) sun or shade (b) amount of water drops (c) the same kind of bag
21. 21.🛟 Why must children keep their fingers away from the iron? (a) it is magnetic (b) it can burn skin (c) it is sticky (d) it is cold
22. 22.🧺 Do we need a battery cell for the turmeric test? (a) not needed (b) needed
23. 23.🧺 Which of these is not needed for the turmeric test? (a) soap solution (b) water (c) a comb (d) white paper strips
24. 24.🧺 Do we need a mirror for the muddy water filter? (a) not needed (b) needed
25. 25.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: time to make butter is what we measure. (a) True (b) False
26. 26.⚖️ Fair test — do seeds need water to sprout? What do we do with “how many seeds sprout”? (a) we keep it the same (b) we change it (c) we measure it
27. 27.🧺 Do we need a potted plant for the leafy bag test? (a) needed (b) not needed
28. 28.True or false: a magnet is needed for the leafy bag test. (a) True (b) False
29. 29.🪴 Which part of a plant does this job: carry water upward? (a) flower (b) leaves (c) roots (d) stem
30. 30.🧂 Which of these dissolves in water? (a) sawdust (b) small pebbles (c) food colour (d) sand
31. 31.True or false: a comb is not needed for the fizzy balloon. (a) False (b) True
32. 32.🧺 Do we need a balloon for the secret lemon message? (a) needed (b) not needed
33. 33.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the kind of balloon”? (a) we keep it the same (b) we measure it (c) we change it
34. 34.🪴 Which part of a plant does this job: make seeds? (a) stem (b) leaves (c) flower (d) roots
35. 35.🔮 Predict: seeds on wet cotton are kept in a dark cupboard. Will they sprout? (a) they melt (b) they turn to stones (c) yes, they sprout (d) no, never
36. 36.🧺 Which of these is needed for the leafy bag test? (a) turmeric powder (b) yeast (c) a clear plastic bag (d) a mirror
37. 37.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) white paper (b) an adult with an iron (c) a small bowl (d) yeast
38. 38.🔍 Which is the odd one out? (a) reading the message (b) dipping the cotton bud (c) plugging in the iron (d) writing the message
39. 39.🔮 The fizzing stops after a while. Why? (a) the gas froze (b) the bottle got tired (c) the balloon got cold (d) an ingredient ran out
40. 40.🧂 Which of these dissolves in water? (a) sand (b) cooking oil (c) small pebbles (d) sugar

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