Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 874 · 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 safety rule fits the fizzy balloon experiment? (a) put it in your mouth (b) keep it away from eyes (c) shake it near your face (d) seal it in a glass jar
2. 2.⚖️ Fair test — do seeds need water to sprout? Which of these is what we measure? (a) the kind of seeds (b) the number of seeds (c) the same place (d) how many seeds sprout
3. 3.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a balloon (b) baking soda (c) a tray for spills (d) sugar
4. 4.🫗 Is filtered pond water safe to drink? (a) yes, if it is clear (b) yes, always (c) no, germs may stay (d) yes, if it is cold
5. 5.🫗 How do we separate bran from wheat flour? (a) handpicking (b) sieving (c) filtering (d) evaporating
6. 6.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a rubber band (b) a clear plastic bag (c) sunlight (d) vinegar
7. 7.🛟 Who should use the hot iron in the secret message experiment? (a) whoever is fastest (b) any child (c) the youngest child (d) only an adult
8. 8.🧺 Do we need sugar for the fizzy balloon? (a) needed (b) not needed
9. 9.True or false: turmeric powder is not needed for the secret lemon message. (a) True (b) False
10. 10.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “time to make butter”? (a) we change it (b) we measure it (c) we keep it the same
11. 11.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the same bottle”? (a) we keep it the same (b) we measure it (c) we change it
12. 12.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a bowl (b) fresh cream (c) a magnet (d) a jar with a tight lid
13. 13.🛟 Which rule keeps the turmeric test safe? (a) mix bathroom cleaners (b) sip each liquid (c) use only kitchen items (d) sniff each bottle hard
14. 14.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) safe from small children (c) next to the baby (d) on the edge of a table
15. 15.True or false: moong seeds is needed for sprouting seeds. (a) False (b) True
16. 16.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) the yeast is killed (b) it grows faster (c) it glows (d) it turns to sugar
17. 17.🧂 Which of these dissolves in water? (a) chalk powder (b) sand (c) small pebbles (d) table salt
18. 18.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a timer (b) a mirror (c) a jar with a tight lid (d) fresh cream
19. 19.True or false: make seeds is a job of the flower. (a) False (b) True
20. 20.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a comb (b) white paper strips (c) soap solution (d) water
21. 21.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) no crystals (b) liquid crystals (c) bigger crystals (d) smaller crystals
22. 22.🌱 Which of these does not sprout? (a) wet seeds by a window (b) seeds on dry cotton (c) wet seeds in the dark (d) seeds on wet cotton
23. 23.🧺 Which of these is needed for the secret lemon message? (a) a battery cell (b) a mirror (c) a small bowl (d) turmeric powder
24. 24.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the iron setting”? (a) we keep it the same (b) we measure it (c) we change it
25. 25.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) dry yeast (c) sugar (d) a comb
26. 26.🧺 Do we need a balloon for making butter? (a) needed (b) not needed
27. 27.🧺 Do we need a jar with a tight lid for making butter? (a) needed (b) not needed
28. 28.True or false: lemon juice is not needed for the secret lemon message. (a) False (b) True
29. 29.🔍 Which is the odd one out? (a) salt (b) water (c) soil (d) sugar
30. 30.True or false: a shallow dish is not needed for growing salt crystals. (a) False (b) True
31. 31.True or false: a seed is needed for the fizzy balloon. (a) True (b) False
32. 32.🟡 Turmeric paper meets salt water. What happens? (a) turns reddish-brown (b) stays yellow
33. 33.🔮 Can the brown writing go back to being invisible? (a) yes, in the dark (b) yes, if cooled (c) no, it stays brown (d) yes, if shaken
34. 34.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a cotton bud (b) turmeric powder (c) an adult with an iron (d) lemon juice
35. 35.True or false: sugar is something yeast does not need. (a) True (b) False
36. 36.🔍 Which is the odd one out? (a) writing the message (b) ironing the paper (c) putting the iron away (d) plugging in the iron
37. 37.🍞 Why does yeast work slowly in cold water? (a) cold slows yeast down (b) cold makes it pink (c) cold kills sugar (d) cold water is heavy
38. 38.🔍 Which is the odd one out? (a) soil (b) air (c) water (d) warmth
39. 39.🧺 Which of these is not needed for the secret lemon message? (a) yeast (b) a cotton bud (c) lemon juice (d) white paper
40. 40.🔍 Which is the odd one out? (a) baking a cake (b) folding paper (c) melting butter (d) melting ice

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