Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 380 · 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 — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is the one thing we change. (a) True (b) False
2. 2.🧺 Which of these is not needed for sprouting seeds? (a) moong seeds (b) yeast (c) a few days (d) a small bowl
3. 3.True or false: salt water is a base. (a) True (b) False
4. 4.🧺 Which of these is not needed for the turmeric test? (a) white paper strips (b) a dropper or spoon (c) a balloon (d) lemon juice
5. 5.🔍 Which is the odd one out? (a) detergent water (b) curd (c) baking soda water (d) soap solution
6. 6.🟡 Turmeric paper meets tamarind water. What happens? (a) turns reddish-brown (b) stays yellow
7. 7.🌱 Will these sprout: seeds in the freezer? (a) does not sprout (b) sprouts
8. 8.🛟 Some seeds from shops are coated with chemicals. What is the safe rule? (a) eat a few to check (b) throw them at friends (c) never put seeds in mouth (d) feed them to pets
9. 9.🌱 Which of these is needed for a seed to sprout? (a) soil (b) sugar (c) warmth (d) salt
10. 10.True or false: warm water is not needed for growing salt crystals. (a) True (b) False
11. 11.True or false: wet seeds by a window does not sprout. (a) False (b) True
12. 12.🫗 How do we separate sugar from sugar water? (a) evaporating (b) winnowing (c) handpicking (d) sieving
13. 13.⚖️ Fair test — do seeds need water to sprout? What do we do with “the same place”? (a) we change it (b) we measure it (c) we keep it the same
14. 14.🍋 Which of these steps is a job for an adult? (a) dipping the cotton bud (b) letting the paper dry (c) reading the message (d) putting the iron away
15. 15.🧈 Which of these is a change that can be undone? (a) freezing water (b) rusting iron (c) browning lemon ink (d) milk turning to curd
16. 16.🧺 Do we need a balloon for the secret lemon message? (a) needed (b) not needed
17. 17.🔍 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
18. 18.🔍 Which is the odd one out? (a) vinegar (b) sunlight (c) time (d) salt
19. 19.True or false: letting the paper dry is a job for an adult. (a) True (b) False
20. 20.True or false: air is not needed for a seed to sprout. (a) False (b) True
21. 21.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “the cream temperature”? (a) we keep it the same (b) we measure it (c) we change it
22. 22.🍞 Does yeast need a magnet to make gas? (a) yeast needs it (b) yeast does not need it
23. 23.🧺 Do we need water for sprouting seeds? (a) not needed (b) needed
24. 24.🛟 Which rule keeps the turmeric test safe? (a) use only kitchen items (b) sniff each bottle hard (c) sip each liquid (d) mix bathroom cleaners
25. 25.True or false: salt water is neutral. (a) False (b) True
26. 26.True or false: yeast is needed for the turmeric test. (a) True (b) False
27. 27.🌱 Which of these does not sprout? (a) wet seeds in the dark (b) seeds on wet cotton (c) wet seeds by a window (d) seeds in the freezer
28. 28.🛟 What should you do after handling muddy water? (a) lick your fingers (b) wipe hands on face (c) wash hands afterwards (d) nothing is needed
29. 29.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) a small bowl (b) cotton wool (c) a few days (d) a balloon
30. 30.🛟 Turmeric stains clothes. What should you wear? (a) your school uniform (b) an old shirt or apron (c) a white party dress (d) your best clothes
31. 31.🧂 Which of these dissolves in water? (a) sawdust (b) table salt (c) small pebbles (d) cooking oil
32. 32.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) warm water (c) a magnet (d) salt
33. 33.🧺 Which of these is not needed for making butter? (a) a mirror (b) a timer (c) a jar with a tight lid (d) fresh cream
34. 34.🔮 Predict: the adult irons for only one second. What happens? (a) it gets darker (b) the paper floats (c) writing turns green (d) writing stays faint
35. 35.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a timer (b) a jar with a tight lid (c) fresh cream (d) a battery cell
36. 36.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a magnet (b) a funnel or spoon (c) vinegar (d) an empty bottle
37. 37.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) salt (c) a battery cell (d) a piece of string
38. 38.🍋 Secret message: who does this step — dipping the cotton bud? (a) a child can do it (b) an adult does it
39. 39.🧺 Do we need turmeric powder for growing salt crystals? (a) needed (b) not needed
40. 40.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? Which of these is kept the same? (a) sun or shade (b) the size of the plant (c) amount of water drops

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