Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 351 · 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 turns turmeric reddish-brown? (a) vinegar (b) tamarind water (c) plain water (d) detergent water
2. 2.True or false: a cotton bud is not needed for the secret lemon message. (a) True (b) False
3. 3.🫧 Which of these is a base? (a) lemon juice (b) detergent water (c) orange juice (d) vinegar
4. 4.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) cotton or cloth (b) muddy water (c) sand and pebbles (d) a battery cell
5. 5.🔮 Predict: the jar is filled right to the top with cream. What happens? (a) it takes much longer (b) it is much faster (c) it makes salt (d) it turns pink
6. 6.🧺 Which of these is not needed for the yeast balloon? (a) a comb (b) dry yeast (c) a small bottle (d) sugar
7. 7.🧺 Which of these is needed for the yeast balloon? (a) sugar (b) a battery cell (c) a magnet (d) a mirror
8. 8.🔮 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
9. 9.🔍 Muddy water is left still for an hour. What happens to the mud? (a) it floats on top (b) it sinks to the bottom (c) it turns to sand (d) it dissolves
10. 10.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a balloon (c) a mirror (d) warm water
11. 11.🌱 Which of these does not sprout? (a) wet seeds by a window (b) seeds on wet cotton (c) wet seeds in the dark (d) boiled seeds
12. 12.🍋 Secret message: who does this step — reading the message? (a) an adult does it (b) a child can do it
13. 13.🫧 Is curd an acid, a base or neutral? (a) a base (b) an acid (c) neutral
14. 14.🫧 Is sugar water an acid, a base or neutral? (a) a base (b) an acid (c) neutral
15. 15.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it turns red (b) it turns black (c) it turns blue (d) it stays yellow
16. 16.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is kept the same. (a) True (b) False
17. 17.True or false: baking a cake is a change that cannot be undone. (a) True (b) False
18. 18.🛟 Why must a plastic bag never go over anyone’s head? (a) it is too big (b) it gets wet (c) it changes colour (d) it can block breathing
19. 19.🧺 Do we need water for the turmeric test? (a) not needed (b) needed
20. 20.🧺 Which of these is needed for making butter? (a) a battery cell (b) cold water to rinse (c) a magnet (d) turmeric powder
21. 21.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: the same bottle is what we measure. (a) True (b) False
22. 22.🛟 Which safety rule fits the fizzy balloon experiment? (a) shake it near your face (b) seal it in a glass jar (c) put it in your mouth (d) keep it away from eyes
23. 23.🧺 Do we need cotton or cloth for the muddy water filter? (a) not needed (b) needed
24. 24.True or false: a timer is not needed for making butter. (a) True (b) False
25. 25.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) safe from small children (c) on the edge of a table (d) next to the baby
26. 26.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) salt (c) a balloon (d) a shallow dish
27. 27.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a mirror (b) warm water (c) a shallow dish (d) salt
28. 28.🫗 Muddy water is poured through a cloth filter. What stays on the cloth? (a) the water (b) the mud (c) the salt (d) nothing
29. 29.🫗 Why does filtered muddy water look clearer? (a) the filter adds soap (b) the mud dissolves (c) the water evaporates (d) the filter traps mud
30. 30.🧺 Which of these is needed for the secret lemon message? (a) a battery cell (b) a balloon (c) a small bowl (d) yeast
31. 31.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a rubber band (b) a battery cell (c) a clear plastic bag (d) sunlight
32. 32.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) water (b) cotton wool (c) a few days (d) turmeric powder
33. 33.⚖️ Fair test — do seeds need water to sprout? What do we do with “wet or dry cotton”? (a) we change it (b) we keep it the same (c) we measure it
34. 34.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed
35. 35.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the turmeric paper (b) the light we look in (c) the colour we see (d) the liquid we test
36. 36.🔮 Predict: you use plain water instead of vinegar. What happens? (a) a huge eruption (b) the balloon bursts (c) very little fizzing (d) it turns to honey
37. 37.🍋 Secret message: who does this step — putting the iron away? (a) an adult does it (b) a child can do it
38. 38.🟡 Turmeric paper meets baking soda water. What happens? (a) turns reddish-brown (b) stays yellow
39. 39.🛟 What should you do after handling muddy water? (a) nothing is needed (b) lick your fingers (c) wipe hands on face (d) wash hands afterwards
40. 40.🫧 Is orange juice an acid, a base or neutral? (a) neutral (b) a base (c) an acid

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