Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 293 · 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.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) lemon juice (b) a cotton bud (c) a battery cell (d) white paper
2. 2.🔮 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
3. 3.True or false: a balloon is not needed for sprouting seeds. (a) False (b) True
4. 4.📘 What do we call plants giving out water vapour from their leaves? (a) digestion (b) transpiration (c) reflection (d) germination
5. 5.🍞 Does yeast need time to make gas? (a) yeast needs it (b) yeast does not need it
6. 6.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is what we measure? (a) size of the balloon (b) spoons of baking soda (c) the amount of vinegar (d) the same bottle
7. 7.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the filter material is the one thing we change. (a) False (b) True
8. 8.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “size of the balloon”? (a) we change it (b) we measure it (c) we keep it the same
9. 9.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “the kind of plant”? (a) we change it (b) we measure it (c) we keep it the same
10. 10.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of water is kept the same. (a) False (b) True
11. 11.🫧 Which of these is neutral? (a) curd (b) baking soda water (c) vinegar (d) sugar water
12. 12.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a paper clip (b) a small bottle (c) sugar (d) dry yeast
13. 13.True or false: a paper clip is not needed for the yeast balloon. (a) True (b) False
14. 14.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) fresh cream (b) a bowl (c) a timer (d) a magnet
15. 15.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the same dish”? (a) we keep it the same (b) we measure it (c) we change it
16. 16.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: the same bottle is kept the same. (a) True (b) False
17. 17.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the same paper is kept the same. (a) False (b) True
18. 18.🧺 Which of these is not needed for sprouting seeds? (a) a few days (b) a small bowl (c) a magnet (d) cotton wool
19. 19.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “how hard we shake”? (a) we keep it the same (b) we change it (c) we measure it
20. 20.🪴 Which part of a plant does this job: take in water from soil? (a) stem (b) leaves (c) roots (d) flower
21. 21.🟡 Which of these turns turmeric reddish-brown? (a) salt water (b) tamarind water (c) plain water (d) detergent water
22. 22.📘 Leaves have tiny holes that let out water vapour. What are they called? (a) petals (b) roots (c) veins (d) stomata
23. 23.True or false: baking soda water is a base. (a) False (b) True
24. 24.🧺 Do we need yeast for the muddy water filter? (a) needed (b) not needed
25. 25.🧂 Does sawdust dissolve in water? (a) does not dissolve (b) dissolves in water
26. 26.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) a spoon (c) a balloon (d) a mirror
27. 27.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) the balloon is bigger (b) it turns to bread (c) the balloon is smaller (d) it shrinks to nothing
28. 28.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) a few days (b) cotton wool (c) moong seeds (d) a balloon
29. 29.True or false: baking soda is needed for the fizzy balloon. (a) False (b) True
30. 30.🍋 Which of these steps is a job for an adult? (a) putting the iron away (b) writing the message (c) dipping the cotton bud (d) reading the message
31. 31.🧈 Which of these is a change that can be undone? (a) rusting iron (b) dissolving salt (c) cooking an egg (d) milk turning to curd
32. 32.True or false: baking a cake is a change that cannot be undone. (a) False (b) True
33. 33.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a clear plastic bag (b) a rubber band (c) vinegar (d) sunlight
34. 34.⚖️ 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
35. 35.🔍 Which is the odd one out? (a) melting ice (b) milk turning to curd (c) dissolving salt (d) freezing water
36. 36.🫧 Which of these is neutral? (a) lemon juice (b) detergent water (c) plain water (d) tamarind water
37. 37.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a clear plastic bag (b) a potted plant (c) a mirror (d) a few hours
38. 38.🧺 Do we need a battery cell for growing salt crystals? (a) not needed (b) needed
39. 39.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? Which of these is the one thing we change? (a) sun or shade (b) the size of the plant (c) the time we wait (d) amount of water drops
40. 40.🧺 Do we need a funnel or spoon for the fizzy balloon? (a) not needed (b) needed

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