Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 169 · 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.🧺 Which of these is needed for the yeast balloon? (a) a paper clip (b) a comb (c) a balloon (d) a magnet
2. 2.⚖️ Fair test — do seeds need water to sprout? Which of these is kept the same? (a) wet or dry cotton (b) the number of seeds (c) how many seeds sprout
3. 3.🟡 Which of these keeps turmeric yellow? (a) lemon juice (b) soap solution (c) detergent water (d) baking soda water
4. 4.🟡 Turmeric paper meets soap solution. What happens? (a) stays yellow (b) turns reddish-brown
5. 5.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is kept the same? (a) how clear the water is (b) the filter material (c) the same glass
6. 6.🛟 Turmeric stains clothes. What should you wear? (a) an old shirt or apron (b) your school uniform (c) a white party dress (d) your best clothes
7. 7.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we change it (b) we keep it the same (c) we measure it
8. 8.🫧 Which of these is an acid? (a) soap solution (b) vinegar (c) salt water (d) plain water
9. 9.True or false: a magnet is not needed for the secret lemon message. (a) True (b) False
10. 10.🍋 Which of these steps is a job for an adult? (a) dipping the cotton bud (b) ironing the paper (c) reading the message (d) letting the paper dry
11. 11.🧺 Do we need a tray for spills for the fizzy balloon? (a) not needed (b) needed
12. 12.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: spoons of baking soda is kept the same. (a) False (b) True
13. 13.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “sun or shade”? (a) we keep it the same (b) we measure it (c) we change it
14. 14.True or false: yeast is not needed for the muddy water filter. (a) False (b) True
15. 15.🫧 Which of these is an acid? (a) detergent water (b) sugar water (c) tamarind water (d) salt water
16. 16.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) no crystals (b) smaller crystals (c) liquid crystals (d) bigger crystals
17. 17.🔮 Predict: you stop shaking after only one minute. What do you have? (a) butter lumps (b) still runny cream (c) cheese (d) ghee
18. 18.True or false: a jar with a tight lid is not needed for making butter. (a) False (b) True
19. 19.⚖️ 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 time we wait (b) the same kind of bag (c) sun or shade (d) amount of water drops
20. 20.🧂 Why do we stir in salt until no more will dissolve? (a) to cool the water (b) to change its colour (c) to make it very salty (d) to make it fizz
21. 21.🧺 Which of these is not needed for the fizzy balloon? (a) an empty bottle (b) a seed (c) a funnel or spoon (d) a balloon
22. 22.🧺 Do we need a paper clip for the yeast balloon? (a) not needed (b) needed
23. 23.⚖️ 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
24. 24.🔮 The fizzing stops after a while. Why? (a) the bottle got tired (b) the balloon got cold (c) the gas froze (d) an ingredient ran out
25. 25.True or false: rusting iron is a change that cannot be undone. (a) False (b) True
26. 26.🔮 Predict: which gives more drops in the bag — a hot sunny day or a cool cloudy day? (a) the cool cloudy day (b) neither of them (c) both the same (d) the hot sunny day
27. 27.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns blue (b) it turns darker red (c) it turns yellow again (d) it disappears
28. 28.🛟 Some seeds from shops are coated with chemicals. What is the safe rule? (a) throw them at friends (b) feed them to pets (c) never put seeds in mouth (d) eat a few to check
29. 29.🧺 Which of these is needed for the muddy water filter? (a) a mirror (b) turmeric powder (c) yeast (d) sand and pebbles
30. 30.⚖️ 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) spoons of baking soda (c) the amount of vinegar (d) the same bottle
31. 31.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: amount of water drops is the one thing we change. (a) False (b) True
32. 32.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a balloon (b) white paper strips (c) lemon juice (d) water
33. 33.🧺 Do we need a battery cell for the yeast balloon? (a) not needed (b) needed
34. 34.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: how clear the water is is what we measure. (a) False (b) True
35. 35.True or false: writing the message is a job for an adult. (a) False (b) True
36. 36.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the same muddy water is the one thing we change. (a) False (b) True
37. 37.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is the one thing we change. (a) True (b) False
38. 38.🫧 Is salt water an acid, a base or neutral? (a) an acid (b) neutral (c) a base
39. 39.🔮 Predict: the adult irons for only one second. What happens? (a) writing turns green (b) the paper floats (c) it gets darker (d) writing stays faint
40. 40.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is the one thing we change? (a) the iron setting (b) how dark the writing is (c) the same paper (d) the kind of juice

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