Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 826 · 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: cotton wool is not needed for sprouting seeds. (a) True (b) False
2. 2.🫧 Is sugar water an acid, a base or neutral? (a) neutral (b) a base (c) an acid
3. 3.True or false: baking soda water is a base. (a) True (b) False
4. 4.🔍 What do you see inside the plastic bag after a few hours in the sun? (a) tiny water drops (b) salt crystals (c) nothing at all (d) tiny insects
5. 5.🔍 What do you see after shaking cream in a jar for a long time? (a) bubbles of gas (b) clear water only (c) lumps of butter (d) sugar crystals
6. 6.🧺 Do we need a balloon for the fizzy balloon? (a) not needed (b) needed
7. 7.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) a small bowl (b) moong seeds (c) a few days (d) a mirror
8. 8.🫗 Why does filtered muddy water look clearer? (a) the filter adds soap (b) the water evaporates (c) the mud dissolves (d) the filter traps mud
9. 9.🟡 Turmeric paper meets tamarind water. What happens? (a) stays yellow (b) turns reddish-brown
10. 10.True or false: muddy water is needed for the muddy water filter. (a) True (b) False
11. 11.🧺 Which of these is not needed for the secret lemon message? (a) a small bowl (b) a cotton bud (c) an adult with an iron (d) a balloon
12. 12.🧺 Which of these is not needed for making butter? (a) fresh cream (b) a balloon (c) a timer (d) a bowl
13. 13.🧺 Do we need soap solution for the turmeric test? (a) not needed (b) needed
14. 14.🧈 Can this change be undone: baking a cake? (a) cannot be undone (b) can be undone
15. 15.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: the amount of vinegar is the one thing we change. (a) True (b) False
16. 16.True or false: reading the message is a job a child can do. (a) False (b) True
17. 17.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is what we measure? (a) the same glass (b) how clear the water is (c) the amount poured (d) the filter material
18. 18.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) fresh cream (b) a mirror (c) a jar with a tight lid (d) a bowl
19. 19.⚖️ Fair test — do seeds need water to sprout? Which of these is kept the same? (a) the kind of seeds (b) wet or dry cotton (c) how many seeds sprout
20. 20.🔮 Predict: you pour muddy water through two layers of cloth instead of one. The water comes out ___. (a) muddier (b) hot (c) clearer (d) salty
21. 21.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) a small bottle (c) a mirror (d) dry yeast
22. 22.🫗 Which of these is done by sieving? (a) chaff from wheat grain (b) husk from rice grain (c) bran from wheat flour (d) tea leaves from tea
23. 23.🌱 Which of these sprouts in a few days? (a) boiled seeds (b) wet seeds by a window (c) seeds on dry cotton (d) seeds in the freezer
24. 24.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) size of the balloon (b) the amount of yeast (c) the water temperature
25. 25.True or false: plain water turns turmeric reddish-brown. (a) False (b) True
26. 26.🔍 Which is the odd one out? (a) plugging in the iron (b) cutting the lemon (c) ironing the paper (d) letting the paper dry
27. 27.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) cotton wool (b) a small bowl (c) moong seeds (d) a magnet
28. 28.🔍 Which is the odd one out? (a) sand (b) glucose powder (c) small pebbles (d) chalk powder
29. 29.🧺 Which of these is not needed for the turmeric test? (a) a dropper or spoon (b) soap solution (c) a mirror (d) white paper strips
30. 30.🟡 Which of these turns turmeric reddish-brown? (a) soap solution (b) plain water (c) vinegar (d) tamarind water
31. 31.🌱 Is sunlight needed for a seed to sprout? (a) not needed to sprout (b) needed to sprout
32. 32.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the same glass is the one thing we change. (a) False (b) True
33. 33.🧺 Do we need a magnet for the secret lemon message? (a) not needed (b) needed
34. 34.🟡 Why does soap solution change turmeric’s colour? (a) soap is magnetic (b) soap is an acid (c) soap water is a base (d) soap is hot
35. 35.🔍 Which is the odd one out? (a) detergent water (b) baking soda water (c) lemon juice (d) soap solution
36. 36.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is what we measure. (a) True (b) False
37. 37.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is kept the same? (a) size of the balloon (b) spoons of baking soda (c) the amount of vinegar
38. 38.🧺 Which of these is needed for the turmeric test? (a) a battery cell (b) yeast (c) lemon juice (d) a balloon
39. 39.🧺 Do we need warm water for the yeast balloon? (a) not needed (b) needed
40. 40.🔮 Predict: you filter salty water through cloth. Does the salt stay on the cloth? (a) no, salt passes through (b) it turns to sugar (c) it turns to sand (d) yes, all of it

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