Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 309 · 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.🔮 Predict: you filter salty water through cloth. Does the salt stay on the cloth? (a) no, salt passes through (b) it turns to sand (c) it turns to sugar (d) yes, all of it
2. 2.🧺 Which of these is needed for the fizzy balloon? (a) a battery cell (b) sugar (c) a balloon (d) a mirror
3. 3.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) a few days (b) a small bowl (c) a mirror (d) moong seeds
4. 4.🔍 Muddy water is left still for an hour. What happens to the mud? (a) it sinks to the bottom (b) it floats on top (c) it turns to sand (d) it dissolves
5. 5.🧺 Do we need turmeric powder for growing salt crystals? (a) needed (b) not needed
6. 6.🌱 Is sunlight needed for a seed to sprout? (a) needed to sprout (b) not needed to sprout
7. 7.True or false: tea leaves from tea is done by sieving. (a) False (b) True
8. 8.🔮 Predict: you shake skimmed milk (with almost no cream) instead. What happens? (a) it turns blue (b) it turns to cheese (c) more butter forms (d) no butter forms
9. 9.🛟 Some seeds from shops are coated with chemicals. What is the safe rule? (a) never put seeds in mouth (b) eat a few to check (c) throw them at friends (d) feed them to pets
10. 10.🧺 Do we need lemon juice for the secret lemon message? (a) not needed (b) needed
11. 11.🛟 What should you do after handling muddy water? (a) nothing is needed (b) wipe hands on face (c) lick your fingers (d) wash hands afterwards
12. 12.True or false: curd is an acid. (a) False (b) True
13. 13.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) muddy water (b) a magnet (c) sand and pebbles (d) a clean glass
14. 14.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns blue (b) reddish-brown (c) it turns green (d) it stays yellow
15. 15.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “days to see crystals”? (a) we change it (b) we keep it the same (c) we measure it
16. 16.True or false: sugar water turns turmeric reddish-brown. (a) False (b) True
17. 17.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) a small bowl (b) water (c) moong seeds (d) a magnet
18. 18.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “how dark the writing is”? (a) we measure it (b) we keep it the same (c) we change it
19. 19.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a bowl (b) cold water to rinse (c) a balloon (d) a timer
20. 20.🧺 Do we need a cotton bud for the secret lemon message? (a) not needed (b) needed
21. 21.True or false: a bowl is needed for making butter. (a) False (b) True
22. 22.True or false: an adult with an iron is not needed for the secret lemon message. (a) False (b) True
23. 23.🍋 What colour does the lemon writing turn when an adult warms it? (a) green (b) blue (c) white (d) brown
24. 24.🌱 Which of these sprouts in a few days? (a) boiled seeds (b) seeds in the freezer (c) seeds on dry cotton (d) wet seeds in the dark
25. 25.🫗 How do we separate tea leaves from tea? (a) sieving (b) filtering (c) evaporating (d) winnowing
26. 26.🧂 Does baking soda dissolve in water? (a) dissolves in water (b) does not dissolve
27. 27.True or false: salt water is neutral. (a) False (b) True
28. 28.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) cooking an egg (c) folding paper (d) baking a cake
29. 29.True or false: salt is something yeast does not need. (a) True (b) False
30. 30.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) sugar (c) dry yeast (d) a mirror
31. 31.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
32. 32.🧂 Does sugar dissolve in water? (a) does not dissolve (b) dissolves in water
33. 33.🔮 Predict: you stop shaking after only one minute. What do you have? (a) cheese (b) butter lumps (c) still runny cream (d) ghee
34. 34.True or false: freezing water is a change that cannot be undone. (a) True (b) False
35. 35.🧺 Which of these is not needed for the muddy water filter? (a) a magnet (b) a funnel (c) muddy water (d) cotton or cloth
36. 36.🧺 Do we need sunlight for the leafy bag test? (a) not needed (b) needed
37. 37.🍞 Which of these is something yeast does not need? (a) warm water (b) time (c) sugar (d) a magnet
38. 38.🫧 What do you see when baking soda meets vinegar? (a) it glows in the dark (b) nothing at all (c) it turns to ice (d) lots of fizzy bubbles
39. 39.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) dry yeast (c) a balloon (d) a comb
40. 40.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) soap solution (c) white paper strips (d) a battery cell

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