Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 603 · 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 a job of the leaves? (a) make seeds (b) take in water from soil (c) hold up the leaves (d) make food in sunlight
2. 2.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a mirror (b) a clear plastic bag (c) sunlight (d) a potted plant
3. 3.📘 The browning of lemon juice with heat is a ___ change. (a) chemical (b) magnetic (c) physical (d) musical
4. 4.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a comb (c) warm water (d) a balloon
5. 5.🔍 Which is the odd one out? (a) letting the paper dry (b) writing the message (c) dipping the cotton bud (d) ironing the paper
6. 6.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is the one thing we change. (a) True (b) False
7. 7.🧺 Which of these is needed for the secret lemon message? (a) turmeric powder (b) a balloon (c) a battery cell (d) a small bowl
8. 8.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the same muddy water”? (a) we measure it (b) we change it (c) we keep it the same
9. 9.🧺 Which of these is needed for the fizzy balloon? (a) a mirror (b) a balloon (c) a magnet (d) sugar
10. 10.🛟 What should you do after touching soil or seeds? (a) skip washing (b) rub your eyes (c) wash your hands (d) lick your fingers
11. 11.🔍 Which is the odd one out? (a) baking a cake (b) dissolving salt (c) rusting iron (d) milk turning to curd
12. 12.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we measure it (b) we change it (c) we keep it the same
13. 13.🧂 Does glucose powder dissolve in water? (a) does not dissolve (b) dissolves in water
14. 14.🔍 Which is the odd one out? (a) air (b) warmth (c) water (d) sunlight
15. 15.True or false: white paper strips is not needed for the turmeric test. (a) True (b) False
16. 16.True or false: gravel from fine sand is done by handpicking. (a) True (b) False
17. 17.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is the one thing we change? (a) the kind of salt (b) the same dish (c) the amount of water (d) sunny or shady place
18. 18.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) reddish (b) white at once (c) bright blue (d) green
19. 19.🍋 Which of these steps is a job for an adult? (a) dipping the cotton bud (b) letting the paper dry (c) reading the message (d) ironing the paper
20. 20.🧺 Which of these is not needed for making butter? (a) cold water to rinse (b) yeast (c) fresh cream (d) a bowl
21. 21.🌊 How is salt made in salt pans by the sea? (a) fish make it (b) sand is ground up (c) sea water evaporates (d) salt rains down
22. 22.🧺 Which of these is not needed for the turmeric test? (a) white paper strips (b) lemon juice (c) a magnet (d) soap solution
23. 23.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) baking soda water (c) detergent water (d) sugar water
24. 24.🔍 Which is the odd one out? (a) sugar water (b) plain water (c) soap solution (d) vinegar
25. 25.🔍 Which is the odd one out? (a) plain water (b) detergent water (c) baking soda water (d) soap solution
26. 26.🪴 Where did the water inside the bag come from? (a) the plastic (b) the rain (c) the rubber band (d) the leaves
27. 27.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) dissolving salt (c) freezing water (d) milk turning to curd
28. 28.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) a balloon (c) a magnet (d) sugar
29. 29.True or false: baking a cake is a change that cannot be undone. (a) False (b) True
30. 30.🛟 What should you do if vinegar splashes in your eye? (a) add baking soda (b) rinse with clean water (c) ignore it (d) rub it hard
31. 31.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) on the edge of a table (c) safe from small children (d) next to the baby
32. 32.🔮 The fizzing stops after a while. Why? (a) the gas froze (b) the bottle got tired (c) an ingredient ran out (d) the balloon got cold
33. 33.True or false: tea leaves from tea is done by filtering. (a) True (b) False
34. 34.True or false: sugar is needed for the yeast balloon. (a) False (b) True
35. 35.True or false: sugar is something yeast does not need. (a) False (b) True
36. 36.True or false: baking soda water keeps turmeric yellow. (a) False (b) True
37. 37.🍞 Where is yeast used in the kitchen? (a) to wash dishes (b) to clean floors (c) to colour rice (d) to make bread rise
38. 38.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) the balloon is bigger (b) the balloon is smaller (c) it turns to bread (d) it shrinks to nothing
39. 39.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) white paper strips (b) turmeric powder (c) a dropper or spoon (d) a battery cell
40. 40.🧺 Which of these is needed for the secret lemon message? (a) a battery cell (b) a balloon (c) a magnet (d) lemon juice

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