Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 36 · 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.🫧 Which of these is neutral? (a) tamarind water (b) orange juice (c) sugar water (d) vinegar
2. 2.🫧 What do you see when baking soda meets vinegar? (a) it turns to ice (b) lots of fizzy bubbles (c) nothing at all (d) it glows in the dark
3. 3.🍞 Which of these is something yeast does not need? (a) sugar (b) a magnet (c) time (d) warm water
4. 4.🫧 Is orange juice an acid, a base or neutral? (a) neutral (b) an acid (c) a base
5. 5.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? Which of these is what we measure? (a) the time we wait (b) the kind of plant (c) amount of water drops (d) the same kind of bag
6. 6.🎈 What blows up the balloon in the yeast experiment? (a) steam (b) carbon dioxide gas (c) air from outside (d) smoke
7. 7.🔍 Which is the odd one out? (a) plain water (b) curd (c) orange juice (d) lemon juice
8. 8.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) it stays white (b) green (c) bright blue (d) reddish-brown
9. 9.🧺 Do we need a mirror for the yeast balloon? (a) not needed (b) needed
10. 10.🔍 Which is the odd one out? (a) writing the message (b) ironing the paper (c) plugging in the iron (d) putting the iron away
11. 11.True or false: yeast is not needed for sprouting seeds. (a) True (b) False
12. 12.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is kept the same. (a) False (b) True
13. 13.True or false: a magnet is needed for growing salt crystals. (a) False (b) True
14. 14.True or false: dry yeast is needed for the yeast balloon. (a) True (b) False
15. 15.🔮 Predict: you write with plain water instead of lemon juice. What appears after ironing? (a) a rainbow (b) almost nothing (c) dark brown words (d) blue words
16. 16.True or false: detergent water is an acid. (a) True (b) False
17. 17.🧈 Can this change be undone: melting butter? (a) can be undone (b) cannot be undone
18. 18.🔮 Predict: the adult irons for only one second. What happens? (a) writing turns green (b) it gets darker (c) the paper floats (d) writing stays faint
19. 19.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: the kind of plant is kept the same. (a) True (b) False
20. 20.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is the one thing we change. (a) False (b) True
21. 21.🔮 Predict: seeds on wet cotton are kept in the freezer. What happens? (a) they sprout faster (b) they grow fruit (c) they do not sprout (d) they glow
22. 22.🛟 Some seeds from shops are coated with chemicals. What is the safe rule? (a) eat a few to check (b) feed them to pets (c) throw them at friends (d) never put seeds in mouth
23. 23.🔮 Predict: which gives more drops in the bag — a hot sunny day or a cool cloudy day? (a) both the same (b) neither of them (c) the hot sunny day (d) the cool cloudy day
24. 24.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) warm water (c) a balloon (d) a shallow dish
25. 25.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) rusting iron (c) baking a cake (d) melting ice
26. 26.🛟 Why should you never drink water just because it looks clear? (a) clear water is hot (b) germs are invisible (c) clear water is salty (d) clear water is sweet
27. 27.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it fizzes (b) crystals grow faster (c) few or no crystals (d) it turns sweet
28. 28.🛟 Which safety rule fits the fizzy balloon experiment? (a) keep it away from eyes (b) seal it in a glass jar (c) put it in your mouth (d) shake it near your face
29. 29.🫧 Is baking soda water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
30. 30.🫧 Which of these is an acid? (a) soap solution (b) sugar water (c) vinegar (d) detergent water
31. 31.🧺 Which of these is needed for the secret lemon message? (a) a cotton bud (b) turmeric powder (c) yeast (d) a mirror
32. 32.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we change it (b) we measure it (c) we keep it the same
33. 33.🧂 Which of these dissolves in water? (a) cooking oil (b) sawdust (c) chalk powder (d) glucose powder
34. 34.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is what we measure? (a) the same paper (b) how dark the writing is (c) the ironing time (d) the same cotton bud
35. 35.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “the size of the plant”? (a) we keep it the same (b) we measure it (c) we change it
36. 36.⚖️ 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 water temperature (b) size of the balloon (c) the same bottles (d) the amount of water
37. 37.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a potted plant (b) a clear plastic bag (c) a magnet (d) a few hours
38. 38.True or false: a jar with a tight lid is needed for making butter. (a) True (b) False
39. 39.True or false: salt from sea water is done by evaporating. (a) False (b) True
40. 40.True or false: salt is needed for a seed to sprout. (a) True (b) False

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