Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 417 · 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 not needed for the fizzy balloon? (a) baking soda (b) a funnel or spoon (c) a comb (d) an empty bottle
2. 2.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: the same jar is the one thing we change. (a) True (b) False
3. 3.True or false: warm water is not needed for the yeast balloon. (a) False (b) True
4. 4.🛟 The water for the yeast should be ___. (a) boiling hot (b) very salty (c) ice cold (d) warm, not hot
5. 5.🧺 Do we need white paper for the secret lemon message? (a) needed (b) not needed
6. 6.🍞 Does yeast need vinegar to make gas? (a) yeast needs it (b) yeast does not need it
7. 7.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: the size of the plant is what we measure. (a) True (b) False
8. 8.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “how dark the writing is”? (a) we change it (b) we measure it (c) we keep it the same
9. 9.True or false: baking soda water is an acid. (a) True (b) False
10. 10.🧺 Which of these is not needed for the leafy bag test? (a) a clear plastic bag (b) a rubber band (c) vinegar (d) a few hours
11. 11.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is the one thing we change? (a) the ironing time (b) how dark the writing is (c) the same paper (d) the kind of juice
12. 12.True or false: bad grains from rice is done by handpicking. (a) True (b) False
13. 13.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is kept the same? (a) the kind of juice (b) how dark the writing is (c) the same paper
14. 14.🌱 Which of these sprouts in a few days? (a) seeds on wet cotton (b) boiled seeds (c) seeds on dry cotton (d) seeds in the freezer
15. 15.🍋 Which of these steps is a job a child can do? (a) putting the iron away (b) reading the message (c) ironing the paper (d) plugging in the iron
16. 16.True or false: reading the message is a job for an adult. (a) False (b) True
17. 17.⚖️ Fair test — do seeds need water to sprout? Which of these is what we measure? (a) the same bowls (b) how many seeds sprout (c) the same place (d) the number of seeds
18. 18.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is kept the same? (a) the amount of cream (b) the cream temperature (c) time to make butter
19. 19.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the same paper is kept the same. (a) False (b) True
20. 20.🔍 Which is the odd one out? (a) salt water (b) vinegar (c) tamarind water (d) soap solution
21. 21.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) the amount of water (b) size of the balloon (c) the water temperature (d) the amount of yeast
22. 22.True or false: a battery cell is needed for the muddy water filter. (a) False (b) True
23. 23.🧂 Why do crystals appear as the dish dries? (a) salt grows roots (b) salt eats water (c) water evaporates (d) the dish melts
24. 24.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) turmeric powder (b) a bowl (c) fresh cream (d) a jar with a tight lid
25. 25.⚖️ Fair test — do seeds need water to sprout? What do we do with “the kind of seeds”? (a) we measure it (b) we keep it the same (c) we change it
26. 26.🛟 Lemon juice stings cuts and eyes. What should you do after the experiment? (a) lick your fingers (b) skip washing (c) wash your hands (d) rub your eyes
27. 27.🟡 Which of these keeps turmeric yellow? (a) baking soda water (b) vinegar (c) soap solution (d) detergent water
28. 28.🪴 Which of these is a job of the roots? (a) make food in sunlight (b) hold up the leaves (c) hold the plant in soil (d) give out water vapour
29. 29.🧈 Can this change be undone: milk turning to curd? (a) cannot be undone (b) can be undone
30. 30.True or false: dissolving salt is a change that cannot be undone. (a) True (b) False
31. 31.🌱 Seeds need water, air and ___ to sprout. (a) soil (b) sugar (c) warmth (d) salt
32. 32.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) a battery cell (c) dry yeast (d) a paper clip
33. 33.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) white paper strips (c) water (d) a comb
34. 34.🫗 Which of these is done by handpicking? (a) bad grains from rice (b) mud from water (c) tea leaves from tea (d) husk from rice grain
35. 35.📘 Is the fizzing a sign that a new substance is made? (a) no, nothing changes (b) yes, a new gas forms (c) it is only dissolving (d) it is only melting
36. 36.🛟 Which safety rule fits the fizzy balloon experiment? (a) seal it in a glass jar (b) put it in your mouth (c) shake it near your face (d) keep it away from eyes
37. 37.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is the one thing we change? (a) the amount of water (b) the amount of salt (c) sunny or shady place (d) days to see crystals
38. 38.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a funnel or spoon (b) a battery cell (c) baking soda (d) a balloon
39. 39.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the water temperature is kept the same. (a) True (b) False
40. 40.🫗 How do we separate salt from sea water? (a) evaporating (b) winnowing (c) filtering (d) handpicking

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