Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 99 · 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 sprouts in a few days? (a) boiled seeds (b) seeds in the freezer (c) wet seeds by a window (d) seeds on dry cotton
2. 2.🧺 Which of these is not needed for the leafy bag test? (a) a rubber band (b) a few hours (c) a potted plant (d) a mirror
3. 3.⚖️ Fair test — do seeds need water to sprout? Which of these is the one thing we change? (a) how many seeds sprout (b) the same bowls (c) the number of seeds (d) wet or dry cotton
4. 4.🍋 Which of these steps is a job for an adult? (a) dipping the cotton bud (b) letting the paper dry (c) cutting the lemon (d) reading the message
5. 5.🛟 Lemon juice stings cuts and eyes. What should you do after the experiment? (a) wash your hands (b) rub your eyes (c) lick your fingers (d) skip washing
6. 6.🍞 Which of these is something yeast does not need? (a) warm water (b) sugar (c) salt (d) time
7. 7.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a bowl (b) a magnet (c) a timer (d) a jar with a tight lid
8. 8.True or false: a battery cell is not needed for growing salt crystals. (a) True (b) False
9. 9.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the kind of juice”? (a) we measure it (b) we keep it the same (c) we change it
10. 10.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) nobody needs to (c) a grown-up (d) a friend who is running
11. 11.True or false: plain water is neutral. (a) False (b) True
12. 12.🛟 After the yeast experiment, what should you do with the mixture? (a) throw it at a wall (b) put it in your mouth (c) keep it for a month (d) pour it down the sink
13. 13.🍞 Which of these is something yeast needs? (a) vinegar (b) salt (c) warm water (d) a magnet
14. 14.True or false: a comb is needed for the turmeric test. (a) True (b) False
15. 15.True or false: an empty bottle is needed for the fizzy balloon. (a) True (b) False
16. 16.📘 Is the fizzing a sign that a new substance is made? (a) no, nothing changes (b) yes, a new gas forms (c) it is only dissolving (d) it is only melting
17. 17.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns darker red (b) it turns yellow again (c) it disappears (d) it turns blue
18. 18.🪴 Which of these is a job of the roots? (a) take in water from soil (b) carry water upward (c) make seeds (d) make food in sunlight
19. 19.🔍 Which is the odd one out? (a) folding paper (b) melting ice (c) melting butter (d) milk turning to curd
20. 20.True or false: tea leaves from tea is done by handpicking. (a) True (b) False
21. 21.True or false: salt from sea water is done by evaporating. (a) False (b) True
22. 22.🧈 Can this change be undone: folding paper? (a) cannot be undone (b) can be undone
23. 23.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the same bottles”? (a) we change it (b) we measure it (c) we keep it the same
24. 24.🔮 Predict: the adult irons for only one second. What happens? (a) the paper floats (b) it gets darker (c) writing stays faint (d) writing turns green
25. 25.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) turmeric powder (c) a piece of string (d) warm water
26. 26.🧺 Which of these is needed for the turmeric test? (a) a balloon (b) a comb (c) soap solution (d) a magnet
27. 27.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: how hard we shake is the one thing we change. (a) False (b) True
28. 28.🔮 Predict: you filter salty water through cloth. Does the salt stay on the cloth? (a) it turns to sand (b) it turns to sugar (c) yes, all of it (d) no, salt passes through
29. 29.🔍 Which is the odd one out? (a) orange juice (b) curd (c) tamarind water (d) detergent water
30. 30.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the amount of water”? (a) we measure it (b) we keep it the same (c) we change it
31. 31.🔍 Which is the odd one out? (a) milk turning to curd (b) baking a cake (c) freezing water (d) browning lemon ink
32. 32.True or false: a cotton bud is needed for the secret lemon message. (a) True (b) False
33. 33.🧺 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 balloon (d) lemon juice
34. 34.🫧 Which of these is an acid? (a) orange juice (b) detergent water (c) sugar water (d) baking soda water
35. 35.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the liquid we test (b) the turmeric paper (c) the number of drops (d) the colour we see
36. 36.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) turmeric powder (b) a clean glass (c) muddy water (d) a funnel
37. 37.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) dry yeast (c) sugar (d) a comb
38. 38.🛟 How should the plastic bag be tied around the branch? (a) as tight as possible (b) with a hot glue gun (c) with sharp wire (d) gently, not too tight
39. 39.🫗 Which of these is done by handpicking? (a) chaff from wheat grain (b) husk from rice grain (c) bad grains from rice (d) mud from water
40. 40.🛟 Some seeds from shops are coated with chemicals. What is the safe rule? (a) feed them to pets (b) eat a few to check (c) throw them at friends (d) never put seeds in mouth

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