Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 370 · 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.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: the same bottle is kept the same. (a) False (b) True
2. 2.🧺 Do we need soap solution for the turmeric test? (a) needed (b) not needed
3. 3.🔮 Predict: you filter salty water through cloth. Does the salt stay on the cloth? (a) yes, all of it (b) it turns to sugar (c) no, salt passes through (d) it turns to sand
4. 4.🔍 Which is the odd one out? (a) salt water (b) baking soda water (c) lemon juice (d) vinegar
5. 5.🛟 Why must a plastic bag never go over anyone’s head? (a) it can block breathing (b) it changes colour (c) it is too big (d) it gets wet
6. 6.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is the one thing we change? (a) the same bottle (b) spoons of baking soda (c) the amount of vinegar (d) size of the balloon
7. 7.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “sunny or shady place”? (a) we measure it (b) we keep it the same (c) we change it
8. 8.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is kept the same. (a) True (b) False
9. 9.🍋 Secret message: who does this step — writing the message? (a) an adult does it (b) a child can do it
10. 10.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: the time we wait is kept the same. (a) False (b) True
11. 11.🌱 Which of these sprouts in a few days? (a) seeds on dry cotton (b) boiled seeds (c) seeds in the freezer (d) seeds on wet cotton
12. 12.🛟 Turmeric stains clothes. What should you wear? (a) your best clothes (b) your school uniform (c) a white party dress (d) an old shirt or apron
13. 13.🔮 Predict: you shake skimmed milk (with almost no cream) instead. What happens? (a) it turns to cheese (b) more butter forms (c) it turns blue (d) no butter forms
14. 14.🧂 Why do crystals appear as the dish dries? (a) the dish melts (b) salt grows roots (c) salt eats water (d) water evaporates
15. 15.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the filter material is kept the same. (a) True (b) False
16. 16.🪴 Which part of a plant does this job: carry water upward? (a) flower (b) stem (c) roots (d) leaves
17. 17.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) dry yeast (c) warm water (d) a magnet
18. 18.True or false: a paper clip is needed for the yeast balloon. (a) True (b) False
19. 19.True or false: putting the iron away is a job for an adult. (a) False (b) True
20. 20.True or false: tamarind water is a base. (a) False (b) True
21. 21.True or false: a seed is not needed for the fizzy balloon. (a) True (b) False
22. 22.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is kept the same. (a) True (b) False
23. 23.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is kept the same? (a) spoons of baking soda (b) size of the balloon (c) the kind of balloon
24. 24.🔍 Which is the odd one out? (a) plain water (b) baking soda water (c) detergent water (d) soap solution
25. 25.🧺 Do we need a seed for the fizzy balloon? (a) not needed (b) needed
26. 26.🧈 Which of these is a change that can be undone? (a) melting ice (b) milk turning to curd (c) baking a cake (d) browning lemon ink
27. 27.📘 What do we call a seed starting to grow? (a) evaporation (b) condensation (c) germination (d) pollination
28. 28.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a small bowl (b) lemon juice (c) white paper (d) a mirror
29. 29.🧺 Do we need a potted plant for the leafy bag test? (a) needed (b) not needed
30. 30.🔮 Predict: seeds on wet cotton are kept in the freezer. What happens? (a) they glow (b) they do not sprout (c) they sprout faster (d) they grow fruit
31. 31.True or false: letting the paper dry is a job for an adult. (a) False (b) True
32. 32.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the iron setting is kept the same. (a) False (b) True
33. 33.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it glows (b) it grows faster (c) it turns to sugar (d) the yeast is killed
34. 34.🧺 Which of these is not needed for the yeast balloon? (a) a paper clip (b) a balloon (c) dry yeast (d) warm water
35. 35.🍋 Secret message: who does this step — putting the iron away? (a) an adult does it (b) a child can do it
36. 36.🌱 Will these sprout: boiled seeds? (a) sprouts (b) does not sprout
37. 37.🔍 Which is the odd one out? (a) baking a cake (b) melting butter (c) cooking an egg (d) browning lemon ink
38. 38.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is the one thing we change? (a) the same glass (b) the amount poured (c) the same funnel (d) the filter material
39. 39.🧺 Which of these is not needed for making butter? (a) a bowl (b) a jar with a tight lid (c) a mirror (d) fresh cream
40. 40.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) reddish-brown (b) it stays white (c) green (d) bright blue

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