Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 358 · 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.🧈 What is the watery liquid left after the butter forms? (a) vinegar (b) honey (c) oil (d) buttermilk
2. 2.🫧 Which of these is an acid? (a) lemon juice (b) sugar water (c) baking soda water (d) soap solution
3. 3.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) cotton or cloth (b) sand and pebbles (c) turmeric powder (d) a clean glass
4. 4.🛟 Why must a plastic bag never go over anyone’s head? (a) it gets wet (b) it changes colour (c) it is too big (d) it can block breathing
5. 5.🍞 Does yeast need warm water to make gas? (a) yeast does not need it (b) yeast needs it
6. 6.🧺 Do we need a cotton bud for the secret lemon message? (a) needed (b) not needed
7. 7.🍋 Which of these steps is a job for an adult? (a) letting the paper dry (b) putting the iron away (c) writing the message (d) dipping the cotton bud
8. 8.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) yeast (b) warm water (c) salt (d) a piece of string
9. 9.🧺 Do we need a battery cell for the yeast balloon? (a) needed (b) not needed
10. 10.🧺 Do we need vinegar for the fizzy balloon? (a) needed (b) not needed
11. 11.🫧 Is lemon juice an acid, a base or neutral? (a) an acid (b) neutral (c) a base
12. 12.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it turns yellow (b) it bursts at once (c) it grows much faster (d) it grows very little
13. 13.🔮 Predict: you pour muddy water through two layers of cloth instead of one. The water comes out ___. (a) salty (b) hot (c) clearer (d) muddier
14. 14.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “how hard we shake”? (a) we change it (b) we keep it the same (c) we measure it
15. 15.True or false: warm water is needed for growing salt crystals. (a) True (b) False
16. 16.True or false: food colour dissolves in water. (a) False (b) True
17. 17.⚖️ Fair test — do seeds need water to sprout? What do we do with “the same bowls”? (a) we measure it (b) we keep it the same (c) we change it
18. 18.🫧 Which of these is an acid? (a) salt water (b) tamarind water (c) baking soda water (d) detergent water
19. 19.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of sugar is kept the same. (a) True (b) False
20. 20.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the kind of balloon”? (a) we change it (b) we measure it (c) we keep it the same
21. 21.🧺 Which of these is needed for the muddy water filter? (a) yeast (b) a mirror (c) a magnet (d) cotton or cloth
22. 22.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the amount of vinegar”? (a) we change it (b) we keep it the same (c) we measure it
23. 23.True or false: a battery cell is needed for growing salt crystals. (a) False (b) True
24. 24.🧈 Which of these is a change that can be undone? (a) melting ice (b) baking a cake (c) browning lemon ink (d) rusting iron
25. 25.🌱 Will these sprout: wet seeds by a window? (a) does not sprout (b) sprouts
26. 26.🧺 Do we need warm water for the yeast balloon? (a) needed (b) not needed
27. 27.True or false: a mirror is needed for the yeast balloon. (a) False (b) True
28. 28.🛟 What should you do after handling muddy water? (a) nothing is needed (b) wash hands afterwards (c) lick your fingers (d) wipe hands on face
29. 29.🫧 Is curd an acid, a base or neutral? (a) a base (b) neutral (c) an acid
30. 30.True or false: sugar water is an acid. (a) False (b) True
31. 31.True or false: boiled seeds sprouts in a few days. (a) False (b) True
32. 32.True or false: salt is not needed for a seed to sprout. (a) False (b) True
33. 33.🍋 Why does the lemon writing turn brown with heat? (a) heat adds colour (b) the iron is brown (c) paper turns lemony (d) the juice scorches first
34. 34.🌱 Seeds need water, air and ___ to sprout. (a) sugar (b) soil (c) salt (d) warmth
35. 35.🧺 Do we need a magnet for the muddy water filter? (a) needed (b) not needed
36. 36.🔍 Which is the odd one out? (a) warm water (b) sunlight (c) sugar (d) time
37. 37.🍋 Secret message: who does this step — cutting the lemon? (a) an adult does it (b) a child can do it
38. 38.🧺 Do we need muddy water for the muddy water filter? (a) needed (b) not needed
39. 39.True or false: a small bowl is needed for the secret lemon message. (a) True (b) False
40. 40.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) fresh cream (b) a timer (c) turmeric powder (d) a bowl

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