Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 444 · 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 is a change that can be undone? (a) baking a cake (b) milk turning to curd (c) cooking an egg (d) melting butter
2. 2.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is the one thing we change? (a) the same paper (b) the ironing time (c) how dark the writing is (d) the kind of juice
3. 3.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a balloon (b) a tray for spills (c) a funnel or spoon (d) a magnet
4. 4.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a small bowl (b) white paper (c) yeast (d) an adult with an iron
5. 5.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is what we measure? (a) how clear the water is (b) the amount poured (c) the same glass (d) the same funnel
6. 6.True or false: bad grains from rice is done by sieving. (a) False (b) True
7. 7.🧺 Do we need warm water for growing salt crystals? (a) needed (b) not needed
8. 8.🔍 Which is the odd one out? (a) cutting the lemon (b) putting the iron away (c) ironing the paper (d) letting the paper dry
9. 9.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) a battery cell (c) dry yeast (d) a small bottle
10. 10.🔮 Predict: you shake skimmed milk (with almost no cream) instead. What happens? (a) it turns blue (b) more butter forms (c) no butter forms (d) it turns to cheese
11. 11.True or false: melting ice is a change that cannot be undone. (a) False (b) True
12. 12.🍋 Which of these steps is a job a child can do? (a) plugging in the iron (b) putting the iron away (c) dipping the cotton bud (d) cutting the lemon
13. 13.True or false: rusting iron is a change that cannot be undone. (a) True (b) False
14. 14.🛟 Lemon juice stings cuts and eyes. What should you do after the experiment? (a) wash your hands (b) rub your eyes (c) skip washing (d) lick your fingers
15. 15.🧺 Which of these is needed for the fizzy balloon? (a) a seed (b) a battery cell (c) a comb (d) baking soda
16. 16.📘 The browning of lemon juice with heat is a ___ change. (a) musical (b) chemical (c) magnetic (d) physical
17. 17.🛟 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
18. 18.🔮 Predict: you write with plain water instead of lemon juice. What appears after ironing? (a) dark brown words (b) a rainbow (c) blue words (d) almost nothing
19. 19.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “the kind of plant”? (a) we change it (b) we keep it the same (c) we measure it
20. 20.🧂 Does glucose powder dissolve in water? (a) does not dissolve (b) dissolves in water
21. 21.🧺 Which of these is not needed for the fizzy balloon? (a) a balloon (b) a battery cell (c) a tray for spills (d) baking soda
22. 22.🍞 Does yeast need sunlight to make gas? (a) yeast does not need it (b) yeast needs it
23. 23.🧺 Do we need lemon juice for the turmeric test? (a) needed (b) not needed
24. 24.🔍 Which is the odd one out? (a) baking soda water (b) detergent water (c) soap solution (d) vinegar
25. 25.🫧 What do you see when baking soda meets vinegar? (a) lots of fizzy bubbles (b) nothing at all (c) it glows in the dark (d) it turns to ice
26. 26.🧺 Do we need a funnel for the muddy water filter? (a) not needed (b) needed
27. 27.🔍 Which is the odd one out? (a) a magnet (b) time (c) salt (d) sunlight
28. 28.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) size of the balloon (b) the water temperature (c) the amount of yeast (d) the same bottles
29. 29.🧺 Do we need fresh cream for making butter? (a) needed (b) not needed
30. 30.True or false: seeds on dry cotton does not sprout. (a) False (b) True
31. 31.🍞 Which of these is something yeast needs? (a) a magnet (b) salt (c) sugar (d) sunlight
32. 32.🧺 Do we need moong seeds for sprouting seeds? (a) not needed (b) needed
33. 33.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) turmeric powder (b) a potted plant (c) a few hours (d) a rubber band
34. 34.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: the amount of vinegar is kept the same. (a) False (b) True
35. 35.🧺 Do we need a magnet for sprouting seeds? (a) not needed (b) needed
36. 36.True or false: soap solution is neutral. (a) True (b) False
37. 37.⚖️ 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) True (b) False
38. 38.🛟 After the yeast experiment, what should you do with the mixture? (a) keep it for a month (b) put it in your mouth (c) throw it at a wall (d) pour it down the sink
39. 39.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the amount of yeast”? (a) we measure it (b) we change it (c) we keep it the same
40. 40.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) an adult with an iron (b) a cotton bud (c) a balloon (d) lemon juice

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