Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 507 · 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.🫗 How do we separate husk from rice grain? (a) winnowing (b) handpicking (c) sieving (d) evaporating
2. 2.🧺 Which of these is not needed for the fizzy balloon? (a) a magnet (b) a balloon (c) an empty bottle (d) a tray for spills
3. 3.True or false: gravel from fine sand is done by sieving. (a) False (b) True
4. 4.🔍 Which is the odd one out? (a) reading the message (b) letting the paper dry (c) writing the message (d) putting the iron away
5. 5.🧺 Do we need a jar with a tight lid for making butter? (a) needed (b) not needed
6. 6.🔍 Which is the odd one out? (a) plain water (b) tamarind water (c) salt water (d) soap solution
7. 7.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) a piece of string (c) a battery cell (d) yeast
8. 8.🌱 Which of these does not sprout? (a) seeds on wet cotton (b) wet seeds by a window (c) boiled seeds (d) wet seeds in the dark
9. 9.🧺 Which of these is not needed for the fizzy balloon? (a) a tray for spills (b) an empty bottle (c) baking soda (d) a seed
10. 10.True or false: sugar is not needed for the yeast balloon. (a) True (b) False
11. 11.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is the one thing we change? (a) the amount of water (b) the amount of sugar (c) the water temperature (d) size of the balloon
12. 12.⚖️ 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) the kind of juice (c) how dark the writing is (d) the iron setting
13. 13.🍋 Secret message: who does this step — cutting the lemon? (a) a child can do it (b) an adult does it
14. 14.True or false: turmeric powder is not needed for the turmeric test. (a) False (b) True
15. 15.🌱 Is warmth needed for a seed to sprout? (a) not needed to sprout (b) needed to sprout
16. 16.🪴 Through which part does a plant take in water from the soil? (a) the roots (b) the flowers (c) the fruits (d) the leaves
17. 17.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a potted plant (b) sunlight (c) a magnet (d) a rubber band
18. 18.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a balloon (b) a seed (c) a tray for spills (d) a funnel or spoon
19. 19.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) lemon juice (b) white paper (c) a cotton bud (d) yeast
20. 20.🛟 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
21. 21.🧺 Do we need yeast for the leafy bag test? (a) not needed (b) needed
22. 22.True or false: melting butter is a change that cannot be undone. (a) True (b) False
23. 23.🔮 Predict: the adult irons for only one second. What happens? (a) it gets darker (b) the paper floats (c) writing turns green (d) writing stays faint
24. 24.True or false: dissolving salt is a change that cannot be undone. (a) True (b) False
25. 25.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a battery cell (b) an empty bottle (c) baking soda (d) vinegar
26. 26.🌱 Which of these is needed for a seed to sprout? (a) water (b) salt (c) sunlight (d) soil
27. 27.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the amount of vinegar”? (a) we measure it (b) we change it (c) we keep it the same
28. 28.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is the one thing we change? (a) the filter material (b) the amount poured (c) the same glass (d) the same muddy water
29. 29.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the same cotton bud”? (a) we keep it the same (b) we measure it (c) we change it
30. 30.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is the one thing we change. (a) False (b) True
31. 31.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the amount poured is kept the same. (a) True (b) False
32. 32.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the amount poured is the one thing we change. (a) False (b) True
33. 33.🫧 Which of these is an acid? (a) orange juice (b) sugar water (c) soap solution (d) plain water
34. 34.🧺 Which of these is needed for the secret lemon message? (a) a mirror (b) a cotton bud (c) yeast (d) a magnet
35. 35.🟡 Why does soap solution change turmeric’s colour? (a) soap water is a base (b) soap is magnetic (c) soap is an acid (d) soap is hot
36. 36.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we change it (b) we measure it (c) we keep it the same
37. 37.🧺 Do we need a small bowl for the secret lemon message? (a) not needed (b) needed
38. 38.🔍 Which is the odd one out? (a) detergent water (b) baking soda water (c) sugar water (d) soap solution
39. 39.🛟 Why must children keep their fingers away from the iron? (a) it is cold (b) it is magnetic (c) it can burn skin (d) it is sticky
40. 40.True or false: milk turning to curd is a change that cannot be undone. (a) False (b) True

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