Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 102 · 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.🟡 Turmeric paper meets detergent water. What happens? (a) stays yellow (b) turns reddish-brown
2. 2.🔮 Predict: you pour muddy water through two layers of cloth instead of one. The water comes out ___. (a) hot (b) muddier (c) salty (d) clearer
3. 3.🧺 Which of these is not needed for the turmeric test? (a) white paper strips (b) lemon juice (c) turmeric powder (d) a comb
4. 4.🍞 Which of these is something yeast does not need? (a) warm water (b) sugar (c) sunlight (d) time
5. 5.True or false: yeast is not needed for making butter. (a) True (b) False
6. 6.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) a friend who is running (c) a grown-up (d) nobody needs to
7. 7.🪴 Which part of a plant does this job: hold up the leaves? (a) roots (b) stem (c) flower (d) leaves
8. 8.🫧 Is soap solution an acid, a base or neutral? (a) an acid (b) a base (c) neutral
9. 9.🫗 Which of these is done by evaporating? (a) tea leaves from tea (b) chaff from wheat grain (c) sugar from sugar water (d) husk from rice grain
10. 10.🫧 Which of these is an acid? (a) plain water (b) sugar water (c) detergent water (d) orange juice
11. 11.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) dissolving salt (c) milk turning to curd (d) baking a cake
12. 12.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “amount of water drops”? (a) we change it (b) we keep it the same (c) we measure it
13. 13.⚖️ Fair test — do seeds need water to sprout? Which of these is the one thing we change? (a) how many seeds sprout (b) wet or dry cotton (c) the number of seeds (d) the same bowls
14. 14.🔍 Which is the odd one out? (a) cooking oil (b) small pebbles (c) sawdust (d) table salt
15. 15.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) turmeric powder (c) salt (d) warm water
16. 16.🛟 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
17. 17.🔍 Which is the odd one out? (a) plugging in the iron (b) ironing the paper (c) putting the iron away (d) letting the paper dry
18. 18.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns blue (b) it turns black (c) it turns red (d) it stays yellow
19. 19.🧺 Which of these is needed for the fizzy balloon? (a) a mirror (b) a seed (c) a magnet (d) vinegar
20. 20.🪴 Which of these is a job of the stem? (a) give out water vapour (b) hold the plant in soil (c) make seeds (d) carry water upward
21. 21.🧺 Do we need turmeric powder for sprouting seeds? (a) not needed (b) needed
22. 22.🧂 Does sawdust dissolve in water? (a) dissolves in water (b) does not dissolve
23. 23.🔮 Predict: you tie a bag on a branch with no leaves. Will it collect much water? (a) much more water (b) exactly the same (c) it fills with soil (d) much less water
24. 24.🧺 Do we need a mirror for the yeast balloon? (a) needed (b) not needed
25. 25.True or false: vinegar is not needed for the leafy bag test. (a) False (b) True
26. 26.🪴 Which part of a plant does this job: take in water from soil? (a) leaves (b) roots (c) stem (d) flower
27. 27.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a balloon (b) a battery cell (c) an empty bottle (d) a tray for spills
28. 28.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the iron setting”? (a) we keep it the same (b) we change it (c) we measure it
29. 29.🫧 Which of these is neutral? (a) baking soda water (b) soap solution (c) plain water (d) tamarind water
30. 30.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns blue (b) it stays yellow (c) it turns green (d) reddish-brown
31. 31.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) the same dish (b) sunny or shady place (c) days to see crystals
32. 32.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: the kind of balloon is what we measure. (a) False (b) True
33. 33.🧈 Can this change be undone: milk turning to curd? (a) cannot be undone (b) can be undone
34. 34.🍋 Secret message: who does this step — putting the iron away? (a) a child can do it (b) an adult does it
35. 35.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: size of the balloon is what we measure. (a) False (b) True
36. 36.🧺 Do we need lemon juice for the secret lemon message? (a) not needed (b) needed
37. 37.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a small bowl (b) a magnet (c) lemon juice (d) white paper
38. 38.🫗 Which of these is done by filtering? (a) chaff from wheat grain (b) small stones from dal (c) salt from sea water (d) tea leaves from tea
39. 39.⚖️ 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
40. 40.🔮 Predict: you write with plain water instead of lemon juice. What appears after ironing? (a) dark brown words (b) blue words (c) a rainbow (d) almost nothing

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