Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 572 · 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.True or false: dry yeast is needed for the yeast balloon. (a) True (b) False
2. 2.📘 The browning of lemon juice with heat is a ___ change. (a) musical (b) chemical (c) physical (d) magnetic
3. 3.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the same funnel is kept the same. (a) False (b) True
4. 4.🌱 Will these sprout: boiled seeds? (a) sprouts (b) does not sprout
5. 5.🟡 Turmeric paper meets vinegar. What happens? (a) stays yellow (b) turns reddish-brown
6. 6.True or false: a magnet is something yeast does not need. (a) False (b) True
7. 7.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a bowl (b) cold water to rinse (c) a jar with a tight lid (d) yeast
8. 8.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the same cotton bud”? (a) we change it (b) we keep it the same (c) we measure it
9. 9.🔮 Predict: you use plain water instead of vinegar. What happens? (a) a huge eruption (b) it turns to honey (c) the balloon bursts (d) very little fizzing
10. 10.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “how dark the writing is”? (a) we keep it the same (b) we change it (c) we measure it
11. 11.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it bursts at once (b) it grows very little (c) it grows much faster (d) it turns yellow
12. 12.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed
13. 13.🧺 Which of these is not needed for the secret lemon message? (a) an adult with an iron (b) white paper (c) a small bowl (d) turmeric powder
14. 14.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) safe from small children (c) next to the baby (d) in a busy doorway
15. 15.🔍 What do you see inside the plastic bag after a few hours in the sun? (a) salt crystals (b) tiny insects (c) tiny water drops (d) nothing at all
16. 16.🧂 Which of these dissolves in water? (a) cooking oil (b) food colour (c) sawdust (d) sand
17. 17.🫧 Which of these is an acid? (a) soap solution (b) salt water (c) baking soda water (d) lemon juice
18. 18.🌱 Will these sprout: seeds in the freezer? (a) sprouts (b) does not sprout
19. 19.True or false: a seed is not needed for the fizzy balloon. (a) True (b) False
20. 20.True or false: plain water turns turmeric reddish-brown. (a) False (b) True
21. 21.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is what we measure? (a) the same bottle (b) spoons of baking soda (c) size of the balloon (d) the amount of vinegar
22. 22.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is kept the same? (a) the filter material (b) the same muddy water (c) how clear the water is
23. 23.True or false: air is not needed for a seed to sprout. (a) False (b) True
24. 24.🫗 Muddy water is poured through a cloth filter. What stays on the cloth? (a) the water (b) the mud (c) nothing (d) the salt
25. 25.🧺 Do we need a magnet for the muddy water filter? (a) needed (b) not needed
26. 26.🔍 Muddy water is left still for an hour. What happens to the mud? (a) it sinks to the bottom (b) it turns to sand (c) it floats on top (d) it dissolves
27. 27.🌱 Where does a sprouting seed get its first food from? (a) the sunlight only (b) food stored in the seed (c) the air (d) the cotton wool
28. 28.🛟 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
29. 29.True or false: bad grains from rice is done by handpicking. (a) True (b) False
30. 30.🛟 Which safety rule fits the fizzy balloon experiment? (a) put it in your mouth (b) shake it near your face (c) seal it in a glass jar (d) keep it away from eyes
31. 31.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “the amount of cream”? (a) we change it (b) we keep it the same (c) we measure it
32. 32.⚖️ Fair test — do seeds need water to sprout? True or false: the same place is the one thing we change. (a) False (b) True
33. 33.🛟 How should the plastic bag be tied around the branch? (a) with sharp wire (b) as tight as possible (c) gently, not too tight (d) with a hot glue gun
34. 34.🧺 Which of these is needed for the yeast balloon? (a) a paper clip (b) sugar (c) a battery cell (d) a mirror
35. 35.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the same funnel”? (a) we measure it (b) we change it (c) we keep it the same
36. 36.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) a magnet (c) lemon juice (d) white paper strips
37. 37.True or false: a battery cell is needed for growing salt crystals. (a) False (b) True
38. 38.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) sugar (c) a mirror (d) dry yeast
39. 39.True or false: vinegar is an acid. (a) True (b) False
40. 40.🧺 Which of these is not needed for sprouting seeds? (a) a battery cell (b) a small bowl (c) cotton wool (d) moong seeds

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