Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 459 · 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.🔮 Predict: you pour muddy water through two layers of cloth instead of one. The water comes out ___. (a) muddier (b) clearer (c) hot (d) salty
2. 2.⚖️ Fair test — do seeds need water to sprout? Which of these is kept the same? (a) how many seeds sprout (b) the kind of seeds (c) wet or dry cotton
3. 3.True or false: milk turning to curd is a change that cannot be undone. (a) True (b) False
4. 4.📘 What do we call something that changes colour to show an acid or a base? (a) a pulley (b) a prism (c) a magnet (d) an indicator
5. 5.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) warm water (c) a magnet (d) dry yeast
6. 6.🧺 Which of these is needed for the leafy bag test? (a) a battery cell (b) a magnet (c) turmeric powder (d) a few hours
7. 7.🧺 Which of these is not needed for the secret lemon message? (a) a battery cell (b) a small bowl (c) a cotton bud (d) an adult with an iron
8. 8.🧺 Which of these is not needed for the turmeric test? (a) water (b) a magnet (c) lemon juice (d) soap solution
9. 9.True or false: a dropper or spoon is needed for the turmeric test. (a) True (b) False
10. 10.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the liquid we test (b) the turmeric paper (c) the colour we see
11. 11.True or false: browning lemon ink is a change that can be undone. (a) True (b) False
12. 12.🛟 Why must children keep their fingers away from the iron? (a) it is cold (b) it can burn skin (c) it is sticky (d) it is magnetic
13. 13.⚖️ Fair test — do seeds need water to sprout? True or false: the kind of seeds is kept the same. (a) True (b) False
14. 14.🛟 Who should use the hot iron in the secret message experiment? (a) whoever is fastest (b) any child (c) the youngest child (d) only an adult
15. 15.🪴 Which of these is a job of the flower? (a) make seeds (b) make food in sunlight (c) take in water from soil (d) hold the plant in soil
16. 16.🌱 Is warmth needed for a seed to sprout? (a) not needed to sprout (b) needed to sprout
17. 17.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the amount poured”? (a) we change it (b) we keep it the same (c) we measure it
18. 18.🍞 Does yeast need sugar to make gas? (a) yeast needs it (b) yeast does not need it
19. 19.True or false: a cotton bud is not needed for the secret lemon message. (a) True (b) False
20. 20.🧺 Which of these is needed for sprouting seeds? (a) turmeric powder (b) a balloon (c) moong seeds (d) a battery cell
21. 21.True or false: tea leaves from tea is done by winnowing. (a) True (b) False
22. 22.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) vinegar (b) a funnel or spoon (c) an empty bottle (d) a mirror
23. 23.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) melting butter (c) browning lemon ink (d) freezing water
24. 24.True or false: tamarind water is an acid. (a) False (b) True
25. 25.⚖️ Fair test — do seeds need water to sprout? Which of these is the one thing we change? (a) wet or dry cotton (b) how many seeds sprout (c) the number of seeds (d) the kind of seeds
26. 26.🧺 Do we need a dropper or spoon for the turmeric test? (a) not needed (b) needed
27. 27.True or false: cooking an egg is a change that cannot be undone. (a) False (b) True
28. 28.True or false: vinegar is needed for the fizzy balloon. (a) False (b) True
29. 29.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) a balloon (c) warm water (d) a battery cell
30. 30.🧺 Do we need a mirror for the leafy bag test? (a) needed (b) not needed
31. 31.🧺 Do we need baking soda for the fizzy balloon? (a) not needed (b) needed
32. 32.🧺 Which of these is not needed for sprouting seeds? (a) a small bowl (b) cotton wool (c) water (d) turmeric powder
33. 33.🛟 After the yeast experiment, what should you do with the mixture? (a) keep it for a month (b) put it in your mouth (c) throw it at a wall (d) pour it down the sink
34. 34.🌱 Will these sprout: seeds on wet cotton? (a) sprouts (b) does not sprout
35. 35.🫗 How do we separate sugar from sugar water? (a) handpicking (b) evaporating (c) filtering (d) sieving
36. 36.🧺 Do we need a battery cell for the secret lemon message? (a) needed (b) not needed
37. 37.True or false: a balloon is needed for growing salt crystals. (a) True (b) False
38. 38.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it turns to bread (b) it shrinks to nothing (c) the balloon is bigger (d) the balloon is smaller
39. 39.🧺 Do we need a few days for sprouting seeds? (a) needed (b) not needed
40. 40.🍋 Secret message: who does this step — dipping the cotton bud? (a) an adult does it (b) a child can do it

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