Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 530 · 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.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is kept the same. (a) False (b) True
2. 2.🛟 The water for the yeast should be ___. (a) ice cold (b) very salty (c) warm, not hot (d) boiling hot
3. 3.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the iron setting is kept the same. (a) False (b) True
4. 4.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: size of the balloon is what we measure. (a) True (b) False
5. 5.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “the same kind of bag”? (a) we keep it the same (b) we change it (c) we measure it
6. 6.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) an adult with an iron (b) a balloon (c) a small bowl (d) white paper
7. 7.True or false: a battery cell is needed for the yeast balloon. (a) True (b) False
8. 8.🛟 Why must a plastic bag never go over anyone’s head? (a) it changes colour (b) it can block breathing (c) it gets wet (d) it is too big
9. 9.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) days to see crystals (b) sunny or shady place (c) the amount of salt
10. 10.True or false: a magnet is needed for sprouting seeds. (a) True (b) False
11. 11.🔮 Predict: you use plain water instead of vinegar. What happens? (a) it turns to honey (b) very little fizzing (c) the balloon bursts (d) a huge eruption
12. 12.True or false: sugar water is an acid. (a) True (b) False
13. 13.True or false: freezing water is a change that cannot be undone. (a) True (b) False
14. 14.🌱 Which of these does not sprout? (a) wet seeds by a window (b) seeds on wet cotton (c) boiled seeds (d) wet seeds in the dark
15. 15.🧺 Do we need a comb for the yeast balloon? (a) needed (b) not needed
16. 16.🧺 Which of these is needed for the yeast balloon? (a) dry yeast (b) a comb (c) a battery cell (d) a magnet
17. 17.🫧 Which of these is neutral? (a) lemon juice (b) plain water (c) curd (d) vinegar
18. 18.True or false: a battery cell is not needed for making butter. (a) True (b) False
19. 19.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a small bowl (b) lemon juice (c) a magnet (d) a cotton bud
20. 20.🧂 Does table salt dissolve in water? (a) does not dissolve (b) dissolves in water
21. 21.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the water temperature is the one thing we change. (a) False (b) True
22. 22.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “how clear the water is”? (a) we measure it (b) we change it (c) we keep it the same
23. 23.🛟 What should you do after handling muddy water? (a) wash hands afterwards (b) wipe hands on face (c) lick your fingers (d) nothing is needed
24. 24.🧺 Which of these is not needed for the turmeric test? (a) a balloon (b) turmeric powder (c) water (d) a dropper or spoon
25. 25.🍞 Does yeast need warm water to make gas? (a) yeast needs it (b) yeast does not need it
26. 26.🛟 Why is a plastic jar a good choice for shaking? (a) it is magnetic (b) it will not break (c) it is heavier (d) it is hotter
27. 27.🔮 Predict: sprouts grow in the dark for a week. What colour are their leaves? (a) dark green (b) pale yellow (c) blue (d) bright red
28. 28.True or false: a timer is needed for making butter. (a) False (b) True
29. 29.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: the kind of balloon is kept the same. (a) True (b) False
30. 30.True or false: yeast is not needed for the secret lemon message. (a) False (b) True
31. 31.🛟 What should you do after touching soil or seeds? (a) lick your fingers (b) wash your hands (c) skip washing (d) rub your eyes
32. 32.🌱 Where does a sprouting seed get its first food from? (a) food stored in the seed (b) the air (c) the sunlight only (d) the cotton wool
33. 33.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we measure it (b) we change it (c) we keep it the same
34. 34.🔮 The fizzing stops after a while. Why? (a) an ingredient ran out (b) the gas froze (c) the bottle got tired (d) the balloon got cold
35. 35.True or false: plain water keeps turmeric yellow. (a) True (b) False
36. 36.True or false: soap solution turns turmeric reddish-brown. (a) False (b) True
37. 37.🔍 Which is the odd one out? (a) milk turning to curd (b) folding paper (c) browning lemon ink (d) cooking an egg
38. 38.🔍 Which is the odd one out? (a) salt (b) air (c) sugar (d) soil
39. 39.🧺 Which of these is needed for the fizzy balloon? (a) a mirror (b) sugar (c) a seed (d) vinegar
40. 40.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is the one thing we change? (a) the same jar (b) the cream temperature (c) the amount of cream (d) time to make butter

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