Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 806 · 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.🛟 Why must the jar lid be screwed on tightly? (a) so cream does not spill (b) so it gets hot (c) so air gets out (d) so it turns yellow
2. 2.🪴 Which of these is a job of the stem? (a) take in water from soil (b) carry water upward (c) give out water vapour (d) make food in sunlight
3. 3.🧺 Do we need warm water for the yeast balloon? (a) not needed (b) needed
4. 4.🔮 Predict: you write with plain water instead of lemon juice. What appears after ironing? (a) blue words (b) dark brown words (c) almost nothing (d) a rainbow
5. 5.⚖️ 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 keep it the same (c) we change it
6. 6.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the amount of sugar”? (a) we keep it the same (b) we measure it (c) we change it
7. 7.True or false: a balloon is needed for sprouting seeds. (a) False (b) True
8. 8.True or false: a battery cell is needed for the muddy water filter. (a) False (b) True
9. 9.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) an adult with an iron (b) lemon juice (c) turmeric powder (d) a small bowl
10. 10.🔮 Predict: you tie a bag on a branch with no leaves. Will it collect much water? (a) exactly the same (b) it fills with soil (c) much less water (d) much more water
11. 11.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the same glass is the one thing we change. (a) True (b) False
12. 12.True or false: salt from sea water is done by evaporating. (a) True (b) False
13. 13.🧺 Do we need lemon juice for the turmeric test? (a) needed (b) not needed
14. 14.🍋 Secret message: who does this step — writing the message? (a) an adult does it (b) a child can do it
15. 15.🫧 Which of these is an acid? (a) soap solution (b) baking soda water (c) curd (d) sugar water
16. 16.📘 The browning of lemon juice with heat is a ___ change. (a) musical (b) chemical (c) physical (d) magnetic
17. 17.🧺 Which of these is not needed for the muddy water filter? (a) a clean glass (b) muddy water (c) sand and pebbles (d) yeast
18. 18.True or false: sugar does not dissolve in water. (a) True (b) False
19. 19.📘 Vinegar is an acid and baking soda is a base. What happens when they meet? (a) they float apart (b) they freeze (c) they become magnets (d) they react
20. 20.🛟 Why should you never drink water just because it looks clear? (a) clear water is salty (b) clear water is hot (c) germs are invisible (d) clear water is sweet
21. 21.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) a clean glass (b) sand and pebbles (c) a funnel (d) a balloon
22. 22.True or false: warmth is not needed for a seed to sprout. (a) True (b) False
23. 23.True or false: lemon juice is not needed for the secret lemon message. (a) True (b) False
24. 24.🍞 Which of these is something yeast needs? (a) vinegar (b) time (c) salt (d) sunlight
25. 25.🧺 Which of these is not needed for the turmeric test? (a) a battery cell (b) water (c) a dropper or spoon (d) turmeric powder
26. 26.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a tray for spills (b) a comb (c) a funnel or spoon (d) vinegar
27. 27.⚖️ 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
28. 28.True or false: make seeds is a job of the roots. (a) False (b) True
29. 29.True or false: tea leaves from tea is done by filtering. (a) False (b) True
30. 30.🍋 Secret message: who does this step — putting the iron away? (a) an adult does it (b) a child can do it
31. 31.True or false: vinegar is needed for the fizzy balloon. (a) True (b) False
32. 32.📘 Is the fizzing a sign that a new substance is made? (a) it is only melting (b) it is only dissolving (c) yes, a new gas forms (d) no, nothing changes
33. 33.🫗 Which of these is done by winnowing? (a) chaff from wheat grain (b) sugar from sugar water (c) bran from wheat flour (d) small stones from dal
34. 34.True or false: a rubber band is needed for the leafy bag test. (a) False (b) True
35. 35.🔍 Which is the odd one out? (a) freezing water (b) baking a cake (c) dissolving salt (d) melting butter
36. 36.⚖️ 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 keep it the same (b) we measure it (c) we change it
37. 37.🔍 Which is the odd one out? (a) a magnet (b) sugar (c) warm water (d) time
38. 38.True or false: lemon juice turns turmeric reddish-brown. (a) False (b) True
39. 39.🔮 Predict: a plant gets no water for many days in summer. What happens? (a) it flowers more (b) it wilts and droops (c) it turns blue (d) it grows faster
40. 40.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the kind of juice is the one thing we change. (a) True (b) False

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