Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 994 · 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.True or false: a balloon is not needed for the muddy water filter. (a) False (b) True
2. 2.🪴 Which part of a plant does this job: carry water upward? (a) stem (b) roots (c) flower (d) leaves
3. 3.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) warm water (c) sugar (d) turmeric powder
4. 4.True or false: yeast is needed for the leafy bag test. (a) True (b) False
5. 5.🧺 Which of these is not needed for the secret lemon message? (a) a magnet (b) white paper (c) an adult with an iron (d) a small bowl
6. 6.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the number of drops (b) the colour we see (c) the liquid we test
7. 7.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the amount poured is what we measure. (a) False (b) True
8. 8.🧂 Does sawdust dissolve in water? (a) dissolves in water (b) does not dissolve
9. 9.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is what we measure? (a) the iron setting (b) how dark the writing is (c) the same cotton bud (d) the ironing time
10. 10.🧺 Do we need moong seeds for sprouting seeds? (a) not needed (b) needed
11. 11.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the same bottle”? (a) we change it (b) we measure it (c) we keep it the same
12. 12.🧺 Do we need a mirror for the muddy water filter? (a) not needed (b) needed
13. 13.🧺 Do we need a balloon for the fizzy balloon? (a) needed (b) not needed
14. 14.True or false: a magnet is needed for the yeast balloon. (a) False (b) True
15. 15.🧈 Can this change be undone: melting butter? (a) can be undone (b) cannot be undone
16. 16.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is the one thing we change. (a) True (b) False
17. 17.🔮 Predict: seeds on wet cotton are kept in a dark cupboard. Will they sprout? (a) they turn to stones (b) no, never (c) they melt (d) yes, they sprout
18. 18.🧺 Do we need turmeric powder for the secret lemon message? (a) not needed (b) needed
19. 19.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “how dark the writing is”? (a) we measure it (b) we change it (c) we keep it the same
20. 20.🫗 Why does filtered muddy water look clearer? (a) the filter traps mud (b) the water evaporates (c) the filter adds soap (d) the mud dissolves
21. 21.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “how clear the water is”? (a) we keep it the same (b) we measure it (c) we change it
22. 22.🔍 Which is the odd one out? (a) cutting the lemon (b) putting the iron away (c) dipping the cotton bud (d) ironing the paper
23. 23.True or false: detergent water is a base. (a) True (b) False
24. 24.🔮 Can the brown writing go back to being invisible? (a) yes, if cooled (b) yes, in the dark (c) no, it stays brown (d) yes, if shaken
25. 25.🧺 Do we need a cotton bud for the secret lemon message? (a) not needed (b) needed
26. 26.🔍 Which is the odd one out? (a) food colour (b) sawdust (c) table salt (d) baking soda
27. 27.🛟 The water for the yeast should be ___. (a) very salty (b) boiling hot (c) warm, not hot (d) ice cold
28. 28.🌱 Will these sprout: seeds on dry cotton? (a) sprouts (b) does not sprout
29. 29.🧺 Which of these is needed for sprouting seeds? (a) turmeric powder (b) a balloon (c) a small bowl (d) a mirror
30. 30.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) muddy water (b) sand and pebbles (c) a clean glass (d) yeast
31. 31.🔍 Which is the odd one out? (a) baking soda water (b) salt water (c) detergent water (d) soap solution
32. 32.🧺 Which of these is not needed for making butter? (a) a bowl (b) a magnet (c) a timer (d) cold water to rinse
33. 33.🫗 Which of these is done by sieving? (a) gravel from fine sand (b) husk from rice grain (c) bad grains from rice (d) small stones from dal
34. 34.🪴 Which of these is a job of the flower? (a) make seeds (b) hold up the leaves (c) make food in sunlight (d) take in water from soil
35. 35.🔍 Which is the odd one out? (a) baking a cake (b) dissolving salt (c) freezing water (d) melting ice
36. 36.🧈 Which of these is a change that can be undone? (a) rusting iron (b) browning lemon ink (c) cooking an egg (d) melting butter
37. 37.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) green (b) reddish (c) white at once (d) bright blue
38. 38.🔍 Which is the odd one out? (a) salt (b) vinegar (c) a magnet (d) sugar
39. 39.🔮 Predict: you tie a bag on a branch with no leaves. Will it collect much water? (a) it fills with soil (b) much more water (c) much less water (d) exactly the same
40. 40.🌱 Which of these sprouts in a few days? (a) seeds on dry cotton (b) boiled seeds (c) wet seeds in the dark (d) seeds in the freezer

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