Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 807 · 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.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “sunny or shady place”? (a) we keep it the same (b) we measure it (c) we change it
2. 2.🔮 Predict: tea is poured through a strainer. What happens to the tea leaves? (a) tea stays behind (b) leaves stay behind (c) leaves pass through (d) both stay behind
3. 3.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a potted plant (b) a mirror (c) a clear plastic bag (d) a few hours
4. 4.🫗 Why does filtered muddy water look clearer? (a) the mud dissolves (b) the filter traps mud (c) the water evaporates (d) the filter adds soap
5. 5.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: the kind of balloon is kept the same. (a) True (b) False
6. 6.🪴 Which part of a plant does this job: hold the plant in soil? (a) flower (b) stem (c) roots (d) leaves
7. 7.🛟 Why must a plastic bag never go over anyone’s head? (a) it changes colour (b) it is too big (c) it can block breathing (d) it gets wet
8. 8.🌱 Which of these is not needed for a seed to sprout? (a) air (b) warmth (c) water (d) salt
9. 9.🧈 Can this change be undone: melting butter? (a) can be undone (b) cannot be undone
10. 10.True or false: a battery cell is needed for sprouting seeds. (a) True (b) False
11. 11.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of yeast is kept the same. (a) True (b) False
12. 12.🧺 Which of these is not needed for making butter? (a) fresh cream (b) a bowl (c) a battery cell (d) a jar with a tight lid
13. 13.🔮 Predict: a plant gets no water for many days in summer. What happens? (a) it grows faster (b) it flowers more (c) it turns blue (d) it wilts and droops
14. 14.🫧 Which of these is an acid? (a) baking soda water (b) sugar water (c) detergent water (d) orange juice
15. 15.🍋 Why does the lemon writing turn brown with heat? (a) the iron is brown (b) heat adds colour (c) paper turns lemony (d) the juice scorches first
16. 16.True or false: a cotton bud is not needed for the secret lemon message. (a) False (b) True
17. 17.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the liquid we test (b) the light we look in (c) the colour we see (d) the number of drops
18. 18.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) a mirror (c) a spoon (d) yeast
19. 19.🫧 Which of these is an acid? (a) detergent water (b) tamarind water (c) plain water (d) baking soda water
20. 20.True or false: sugar from sugar water is done by sieving. (a) False (b) True
21. 21.🧺 Do we need an empty bottle for the fizzy balloon? (a) not needed (b) needed
22. 22.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is kept the same? (a) the kind of juice (b) the ironing time (c) how dark the writing is
23. 23.True or false: melting butter is a change that can be undone. (a) True (b) False
24. 24.True or false: yeast is not needed for the leafy bag test. (a) True (b) False
25. 25.🛟 What should you do after touching soil or seeds? (a) rub your eyes (b) lick your fingers (c) wash your hands (d) skip washing
26. 26.🛟 Some seeds from shops are coated with chemicals. What is the safe rule? (a) feed them to pets (b) eat a few to check (c) never put seeds in mouth (d) throw them at friends
27. 27.🫗 Is filtered pond water safe to drink? (a) yes, if it is cold (b) no, germs may stay (c) yes, always (d) yes, if it is clear
28. 28.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: how clear the water is is the one thing we change. (a) True (b) False
29. 29.🪴 Which of these is a job of the stem? (a) take in water from soil (b) hold the plant in soil (c) carry water upward (d) give out water vapour
30. 30.True or false: water is needed for sprouting seeds. (a) False (b) True
31. 31.True or false: yeast is not needed for the turmeric test. (a) False (b) True
32. 32.🧺 Do we need moong seeds for sprouting seeds? (a) not needed (b) needed
33. 33.⚖️ Fair test — do seeds need water to sprout? What do we do with “the number of seeds”? (a) we keep it the same (b) we measure it (c) we change it
34. 34.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is the one thing we change? (a) the kind of balloon (b) the amount of vinegar (c) spoons of baking soda (d) the same bottle
35. 35.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a potted plant (b) sunlight (c) vinegar (d) a clear plastic bag
36. 36.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a jar with a tight lid (b) a timer (c) a bowl (d) a mirror
37. 37.True or false: carry water upward is a job of the leaves. (a) True (b) False
38. 38.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is what we measure? (a) how clear the water is (b) the same glass (c) the same funnel (d) the same muddy water
39. 39.🧂 Why do crystals appear as the dish dries? (a) salt eats water (b) the dish melts (c) water evaporates (d) salt grows roots
40. 40.🪴 Which part of a plant does this job: carry water upward? (a) roots (b) flower (c) stem (d) leaves

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