Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 828 · 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.🫧 Is vinegar an acid, a base or neutral? (a) an acid (b) neutral (c) a base
2. 2.🍞 Which of these is something yeast does not need? (a) time (b) sunlight (c) warm water (d) sugar
3. 3.🧺 Which of these is needed for the muddy water filter? (a) a clean glass (b) a magnet (c) yeast (d) a balloon
4. 4.True or false: a clear plastic bag is needed for the leafy bag test. (a) False (b) True
5. 5.True or false: plain water is neutral. (a) True (b) False
6. 6.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of water is what we measure. (a) True (b) False
7. 7.🌱 Which of these is needed for a seed to sprout? (a) sugar (b) salt (c) soil (d) air
8. 8.🔮 Predict: you pour muddy water through two layers of cloth instead of one. The water comes out ___. (a) hot (b) clearer (c) muddier (d) salty
9. 9.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the kind of juice”? (a) we keep it the same (b) we measure it (c) we change it
10. 10.True or false: a comb is needed for the yeast balloon. (a) False (b) True
11. 11.🧺 Do we need yeast for the turmeric test? (a) needed (b) not needed
12. 12.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) rusting iron (c) dissolving salt (d) milk turning to curd
13. 13.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is kept the same? (a) size of the balloon (b) the kind of balloon (c) spoons of baking soda
14. 14.🔮 Predict: seeds on wet cotton are kept in the freezer. What happens? (a) they grow fruit (b) they glow (c) they sprout faster (d) they do not sprout
15. 15.🧺 Do we need a potted plant for the leafy bag test? (a) not needed (b) needed
16. 16.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a cotton bud (b) white paper (c) lemon juice (d) a magnet
17. 17.🟡 Turmeric paper meets baking soda water. What happens? (a) stays yellow (b) turns reddish-brown
18. 18.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the same muddy water”? (a) we change it (b) we measure it (c) we keep it the same
19. 19.⚖️ Fair test — do seeds need water to sprout? Which of these is what we measure? (a) the same bowls (b) the kind of seeds (c) the number of seeds (d) how many seeds sprout
20. 20.⚖️ 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 sugar (b) the same bottles (c) the water temperature (d) size of the balloon
21. 21.True or false: a mirror is not needed for the turmeric test. (a) False (b) True
22. 22.🫗 Which of these is done by filtering? (a) husk from rice grain (b) tea leaves from tea (c) sugar from sugar water (d) small stones from dal
23. 23.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is the one thing we change? (a) size of the balloon (b) the same bottle (c) the amount of vinegar (d) spoons of baking soda
24. 24.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) sunny or shady place (b) days to see crystals (c) the same dish
25. 25.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the same paper is what we measure. (a) False (b) True
26. 26.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the iron setting is kept the same. (a) True (b) False
27. 27.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “the amount of cream”? (a) we change it (b) we measure it (c) we keep it the same
28. 28.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the amount of water”? (a) we measure it (b) we change it (c) we keep it the same
29. 29.True or false: sugar is something yeast needs. (a) True (b) False
30. 30.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: how clear the water is is what we measure. (a) False (b) True
31. 31.🍋 Which of these steps is a job a child can do? (a) reading the message (b) ironing the paper (c) putting the iron away (d) cutting the lemon
32. 32.🧺 Do we need a balloon for the turmeric test? (a) needed (b) not needed
33. 33.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “the same jar”? (a) we measure it (b) we keep it the same (c) we change it
34. 34.🫗 How do we separate mud from water? (a) sieving (b) handpicking (c) winnowing (d) filtering
35. 35.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) dissolving salt (c) melting ice (d) baking a cake
36. 36.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: how clear the water is is kept the same. (a) False (b) True
37. 37.True or false: a balloon is needed for the turmeric test. (a) True (b) False
38. 38.🧂 Why do we stir in salt until no more will dissolve? (a) to make it very salty (b) to make it fizz (c) to change its colour (d) to cool the water
39. 39.🧂 Which of these does not dissolve in water? (a) small pebbles (b) table salt (c) glucose powder (d) sugar
40. 40.True or false: a potted plant is not needed for the leafy bag test. (a) True (b) False

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