Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 255 · 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.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it glows (b) the yeast is killed (c) it grows faster (d) it turns to sugar
2. 2.🔍 Which is the odd one out? (a) sand (b) food colour (c) cooking oil (d) chalk powder
3. 3.🧺 Do we need turmeric powder for the leafy bag test? (a) needed (b) not needed
4. 4.🧺 Which of these is not needed for the fizzy balloon? (a) a balloon (b) a tray for spills (c) baking soda (d) a battery cell
5. 5.🫧 Which of these is an acid? (a) soap solution (b) baking soda water (c) vinegar (d) sugar water
6. 6.🫧 Which of these is neutral? (a) curd (b) lemon juice (c) baking soda water (d) plain water
7. 7.🍞 Which of these is something yeast does not need? (a) time (b) warm water (c) sunlight (d) sugar
8. 8.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny spheres (b) tiny stars (c) tiny cubes (d) tiny triangles
9. 9.🧺 Which of these is needed for making butter? (a) a mirror (b) a balloon (c) a magnet (d) fresh cream
10. 10.🧺 Which of these is needed for the secret lemon message? (a) a magnet (b) a cotton bud (c) a mirror (d) yeast
11. 11.True or false: lemon juice is neutral. (a) False (b) True
12. 12.🔮 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
13. 13.📘 Vinegar is an acid and baking soda is a base. What happens when they meet? (a) they react (b) they float apart (c) they become magnets (d) they freeze
14. 14.True or false: detergent water is a base. (a) True (b) False
15. 15.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it stays yellow (b) it turns blue (c) it turns red (d) it turns black
16. 16.🧈 Can this change be undone: dissolving salt? (a) can be undone (b) cannot be undone
17. 17.⚖️ Fair test — do seeds need water to sprout? What do we do with “wet or dry cotton”? (a) we measure it (b) we change it (c) we keep it the same
18. 18.🪴 Where did the water inside the bag come from? (a) the leaves (b) the rubber band (c) the rain (d) the plastic
19. 19.⚖️ 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
20. 20.True or false: a timer is not needed for making butter. (a) False (b) True
21. 21.🌱 Is air needed for a seed to sprout? (a) not needed to sprout (b) needed to sprout
22. 22.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “days to see crystals”? (a) we change it (b) we keep it the same (c) we measure it
23. 23.🧂 Why do we stir in salt until no more will dissolve? (a) to make it fizz (b) to cool the water (c) to change its colour (d) to make it very salty
24. 24.🔍 Which is the odd one out? (a) water (b) warmth (c) salt (d) air
25. 25.True or false: an adult with an iron is needed for the secret lemon message. (a) True (b) False
26. 26.⚖️ 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 same kind of bag (b) the time we wait (c) the size of the plant (d) amount of water drops
27. 27.🧺 Do we need cotton wool for sprouting seeds? (a) needed (b) not needed
28. 28.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is what we measure. (a) False (b) True
29. 29.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a magnet (b) a small bowl (c) white paper (d) lemon juice
30. 30.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) folding paper (c) baking a cake (d) browning lemon ink
31. 31.True or false: baking soda water turns turmeric reddish-brown. (a) True (b) False
32. 32.🧺 Do we need moong seeds for sprouting seeds? (a) not needed (b) needed
33. 33.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the colour we see (b) the turmeric paper (c) the number of drops (d) the liquid we test
34. 34.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is kept the same? (a) the iron setting (b) how dark the writing is (c) the kind of juice
35. 35.🌱 What comes out of a moong seed first when it sprouts? (a) a flower (b) a fruit (c) a thorn (d) a tiny root
36. 36.True or false: a magnet is needed for sprouting seeds. (a) True (b) False
37. 37.True or false: sugar water is a base. (a) True (b) False
38. 38.🛟 Which safety rule fits the fizzy balloon experiment? (a) seal it in a glass jar (b) keep it away from eyes (c) put it in your mouth (d) shake it near your face
39. 39.🍋 Secret message: who does this step — letting the paper dry? (a) a child can do it (b) an adult does it
40. 40.🧺 Do we need water for the turmeric test? (a) not needed (b) needed

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