Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 846 · 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.🧈 Before the butter appears, what does the cream turn into? (a) ice (b) powder (c) thick whipped cream (d) clear water
2. 2.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “the time we wait”? (a) we measure it (b) we keep it the same (c) we change it
3. 3.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) the water temperature (b) size of the balloon (c) the same bottles
4. 4.True or false: seeds in the freezer sprouts in a few days. (a) False (b) True
5. 5.🔮 Predict: you use more vinegar and more baking soda. What happens to the balloon? (a) it shrinks (b) it grows bigger (c) there is no change (d) it turns blue
6. 6.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we keep it the same (b) we measure it (c) we change it
7. 7.🔮 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
8. 8.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is what we measure? (a) the kind of juice (b) how dark the writing is (c) the ironing time (d) the same cotton bud
9. 9.🟡 Which of these turns turmeric reddish-brown? (a) tamarind water (b) plain water (c) vinegar (d) soap solution
10. 10.⚖️ 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 measure it (c) we keep it the same
11. 11.True or false: air is not needed for a seed to sprout. (a) True (b) False
12. 12.🧺 Do we need sunlight for the leafy bag test? (a) not needed (b) needed
13. 13.🛟 How should the plastic bag be tied around the branch? (a) as tight as possible (b) with a hot glue gun (c) gently, not too tight (d) with sharp wire
14. 14.🫗 How do we separate tea leaves from tea? (a) winnowing (b) handpicking (c) sieving (d) filtering
15. 15.True or false: a clear plastic bag is needed for the leafy bag test. (a) False (b) True
16. 16.🧺 Do we need yeast for the muddy water filter? (a) not needed (b) needed
17. 17.🔍 Which is the odd one out? (a) folding paper (b) freezing water (c) dissolving salt (d) baking a cake
18. 18.🔮 The fizzing stops after a while. Why? (a) the gas froze (b) an ingredient ran out (c) the balloon got cold (d) the bottle got tired
19. 19.True or false: plain water is an acid. (a) True (b) False
20. 20.🧺 Do we need a mirror for the yeast balloon? (a) needed (b) not needed
21. 21.🍋 Secret message: who does this step — cutting the lemon? (a) an adult does it (b) a child can do it
22. 22.🌱 Which of these is not needed for a seed to sprout? (a) sugar (b) water (c) warmth (d) air
23. 23.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is kept the same? (a) the iron setting (b) how dark the writing is (c) the kind of juice
24. 24.⚖️ 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
25. 25.⚖️ Fair test — do seeds need water to sprout? True or false: the same bowls is the one thing we change. (a) True (b) False
26. 26.🧺 Which of these is not needed for the leafy bag test? (a) sunlight (b) a magnet (c) a clear plastic bag (d) a few hours
27. 27.🧺 Do we need a dropper or spoon for the turmeric test? (a) needed (b) not needed
28. 28.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) the water temperature (b) the amount of yeast (c) size of the balloon
29. 29.🧺 Which of these is needed for the turmeric test? (a) a balloon (b) lemon juice (c) a mirror (d) a magnet
30. 30.🌱 Which of these is not needed for a seed to sprout? (a) soil (b) air (c) warmth (d) water
31. 31.True or false: sugar water turns turmeric reddish-brown. (a) False (b) True
32. 32.🧺 Do we need a small bowl for sprouting seeds? (a) needed (b) not needed
33. 33.True or false: a balloon is needed for the fizzy balloon. (a) False (b) True
34. 34.🔍 Which is the odd one out? (a) detergent water (b) lemon juice (c) salt water (d) plain water
35. 35.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny stars (b) tiny spheres (c) tiny triangles (d) tiny cubes
36. 36.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the kind of juice”? (a) we measure it (b) we change it (c) we keep it the same
37. 37.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the iron setting is what we measure. (a) True (b) False
38. 38.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: the kind of plant is the one thing we change. (a) False (b) True
39. 39.True or false: a cotton bud is needed for the secret lemon message. (a) True (b) False
40. 40.🫧 Which of these is neutral? (a) lemon juice (b) soap solution (c) plain water (d) orange juice

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