Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 83 · 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.🧺 Do we need a timer for making butter? (a) needed (b) not needed
2. 2.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “how dark the writing is”? (a) we change it (b) we measure it (c) we keep it the same
3. 3.🧺 Which of these is needed for the fizzy balloon? (a) a seed (b) a funnel or spoon (c) a comb (d) a mirror
4. 4.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) a magnet (b) a clean glass (c) sand and pebbles (d) a funnel
5. 5.🔮 Predict: seeds on wet cotton are kept in a dark cupboard. Will they sprout? (a) they turn to stones (b) no, never (c) they melt (d) yes, they sprout
6. 6.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the kind of salt”? (a) we change it (b) we measure it (c) we keep it the same
7. 7.🪴 Which part of a plant does this job: make seeds? (a) roots (b) leaves (c) flower (d) stem
8. 8.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) an adult with an iron (b) white paper (c) lemon juice (d) yeast
9. 9.True or false: a potted plant is needed for the leafy bag test. (a) True (b) False
10. 10.🟡 Turmeric paper meets baking soda water. What happens? (a) turns reddish-brown (b) stays yellow
11. 11.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) the amount of sugar (b) size of the balloon (c) the water temperature (d) the amount of yeast
12. 12.🍋 Which of these steps is a job for an adult? (a) reading the message (b) ironing the paper (c) letting the paper dry (d) dipping the cotton bud
13. 13.🫗 How do we separate bad grains from rice? (a) handpicking (b) sieving (c) filtering (d) winnowing
14. 14.🔍 Which is the odd one out? (a) rusting iron (b) dissolving salt (c) folding paper (d) freezing water
15. 15.📘 What do we call a seed starting to grow? (a) condensation (b) germination (c) evaporation (d) pollination
16. 16.🔮 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
17. 17.🧂 Does chalk powder dissolve in water? (a) dissolves in water (b) does not dissolve
18. 18.🟡 Which of these turns turmeric paper reddish-brown? (a) lemon juice (b) sugar water (c) vinegar (d) soap solution
19. 19.🧺 Which of these is not needed for the secret lemon message? (a) an adult with an iron (b) a small bowl (c) white paper (d) yeast
20. 20.🛟 What should you do if vinegar splashes in your eye? (a) rub it hard (b) add baking soda (c) ignore it (d) rinse with clean water
21. 21.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is what we measure. (a) True (b) False
22. 22.🛟 Lemon juice stings cuts and eyes. What should you do after the experiment? (a) lick your fingers (b) rub your eyes (c) skip washing (d) wash your hands
23. 23.🔮 Predict: you use more vinegar and more baking soda. What happens to the balloon? (a) it shrinks (b) it turns blue (c) there is no change (d) it grows bigger
24. 24.True or false: vinegar is an acid. (a) False (b) True
25. 25.True or false: yeast is not needed for the turmeric test. (a) True (b) False
26. 26.🌱 Why do the seeds on dry cotton not sprout? (a) they have no soil (b) they are too wet (c) they have no water (d) they have no salt
27. 27.🍋 Secret message: who does this step — writing the message? (a) an adult does it (b) a child can do it
28. 28.🔍 Which is the odd one out? (a) lemon juice (b) baking soda water (c) vinegar (d) tamarind water
29. 29.🧺 Which of these is not needed for sprouting seeds? (a) moong seeds (b) a small bowl (c) yeast (d) a few days
30. 30.True or false: sugar is needed for the fizzy balloon. (a) True (b) False
31. 31.True or false: a mirror is needed for the secret lemon message. (a) False (b) True
32. 32.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the amount of vinegar”? (a) we measure it (b) we change it (c) we keep it the same
33. 33.🌱 Is water needed for a seed to sprout? (a) needed to sprout (b) not needed to sprout
34. 34.🟡 Turmeric paper meets lemon juice. What happens? (a) turns reddish-brown (b) stays yellow
35. 35.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is what we measure? (a) the same jar (b) time to make butter (c) the cream temperature (d) the amount of cream
36. 36.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the water temperature is what we measure. (a) False (b) True
37. 37.🧺 Which of these is not needed for sprouting seeds? (a) a mirror (b) water (c) cotton wool (d) moong seeds
38. 38.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the liquid we test (b) the light we look in (c) the colour we see (d) the number of drops
39. 39.🧺 Do we need a mirror for growing salt crystals? (a) needed (b) not needed
40. 40.🧺 Do we need a clean glass for the muddy water filter? (a) not needed (b) needed

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