Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 143 · 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.🌱 Will these sprout: seeds in the freezer? (a) sprouts (b) does not sprout
2. 2.⚖️ 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
3. 3.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) dissolving salt (c) browning lemon ink (d) freezing water
4. 4.🧈 Can this change be undone: freezing water? (a) can be undone (b) cannot be undone
5. 5.🫧 Which of these is a base? (a) tamarind water (b) curd (c) baking soda water (d) salt water
6. 6.True or false: baking a cake is a change that can be undone. (a) True (b) False
7. 7.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the water temperature is the one thing we change. (a) False (b) True
8. 8.True or false: cotton or cloth is not needed for the muddy water filter. (a) True (b) False
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.🟡 Turmeric paper meets sugar water. What happens? (a) stays yellow (b) turns reddish-brown
11. 11.🧺 Do we need a balloon for the yeast balloon? (a) not needed (b) needed
12. 12.🧺 Do we need sand and pebbles for the muddy water filter? (a) not needed (b) needed
13. 13.⚖️ Fair test — do seeds need water to sprout? Which of these is what we measure? (a) how many seeds sprout (b) the same place (c) wet or dry cotton (d) the kind of seeds
14. 14.🌱 Which of these does not sprout? (a) wet seeds in the dark (b) seeds on dry cotton (c) seeds on wet cotton (d) wet seeds by a window
15. 15.🧂 Which of these dissolves in water? (a) sawdust (b) chalk powder (c) sand (d) glucose powder
16. 16.True or false: a clear plastic bag is needed for the leafy bag test. (a) False (b) True
17. 17.🧺 Which of these is not needed for the fizzy balloon? (a) a balloon (b) a seed (c) an empty bottle (d) baking soda
18. 18.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the same bottles”? (a) we change it (b) we measure it (c) we keep it the same
19. 19.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) the amount of water (b) days to see crystals (c) the amount of salt (d) sunny or shady place
20. 20.True or false: a magnet is needed for the turmeric test. (a) True (b) False
21. 21.🌱 Which of these sprouts in a few days? (a) boiled seeds (b) seeds on dry cotton (c) wet seeds by a window (d) seeds in the freezer
22. 22.🟡 Turmeric paper meets detergent water. What happens? (a) stays yellow (b) turns reddish-brown
23. 23.🛟 Who should pour the warm water for the crystal experiment? (a) a friend who is running (b) the youngest child (c) a grown-up (d) nobody needs to
24. 24.🔮 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
25. 25.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is what we measure? (a) the filter material (b) the same glass (c) how clear the water is (d) the same muddy water
26. 26.⚖️ 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
27. 27.🔍 What do you see inside the plastic bag after a few hours in the sun? (a) nothing at all (b) salt crystals (c) tiny water drops (d) tiny insects
28. 28.🧺 Which of these is not needed for the leafy bag test? (a) a potted plant (b) yeast (c) a rubber band (d) sunlight
29. 29.🔮 Predict: seeds on wet cotton are kept in a dark cupboard. Will they sprout? (a) they melt (b) no, never (c) they turn to stones (d) yes, they sprout
30. 30.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a bowl (b) a jar with a tight lid (c) yeast (d) fresh cream
31. 31.True or false: mud from water is done by filtering. (a) True (b) False
32. 32.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is what we measure. (a) False (b) True
33. 33.⚖️ 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
34. 34.⚖️ 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
35. 35.🫧 Is tamarind water an acid, a base or neutral? (a) a base (b) an acid (c) neutral
36. 36.🧺 Which of these is not needed for the fizzy balloon? (a) vinegar (b) a mirror (c) baking soda (d) a tray for spills
37. 37.⚖️ Fair test — do seeds need water to sprout? What do we do with “the same bowls”? (a) we keep it the same (b) we change it (c) we measure it
38. 38.True or false: time is something yeast needs. (a) False (b) True
39. 39.🧺 Which of these is needed for the secret lemon message? (a) turmeric powder (b) a small bowl (c) yeast (d) a magnet
40. 40.🔍 What do you see after shaking cream in a jar for a long time? (a) clear water only (b) sugar crystals (c) bubbles of gas (d) lumps of butter

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