Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 755 · 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.📘 The browning of lemon juice with heat is a ___ change. (a) musical (b) physical (c) chemical (d) magnetic
2. 2.🛟 After the yeast experiment, what should you do with the mixture? (a) put it in your mouth (b) keep it for a month (c) throw it at a wall (d) pour it down the sink
3. 3.True or false: salt water keeps turmeric yellow. (a) False (b) True
4. 4.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) the amount of water (b) days to see crystals (c) the same dish (d) sunny or shady place
5. 5.📘 What is yeast? (a) a kind of stone (b) a kind of sugar (c) a kind of salt (d) a tiny living fungus
6. 6.🫗 How do we separate bran from wheat flour? (a) evaporating (b) filtering (c) sieving (d) handpicking
7. 7.🛟 Why is a plastic jar a good choice for shaking? (a) it is hotter (b) it is heavier (c) it is magnetic (d) it will not break
8. 8.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the liquid we test (b) the colour we see (c) the light we look in
9. 9.⚖️ Fair test — do seeds need water to sprout? True or false: the same place is the one thing we change. (a) True (b) False
10. 10.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the kind of balloon”? (a) we change it (b) we measure it (c) we keep it the same
11. 11.🛟 What should you do after handling muddy water? (a) nothing is needed (b) lick your fingers (c) wash hands afterwards (d) wipe hands on face
12. 12.🟡 Turmeric paper meets sugar water. What happens? (a) stays yellow (b) turns reddish-brown
13. 13.🌱 What comes out of a moong seed first when it sprouts? (a) a flower (b) a fruit (c) a thorn (d) a tiny root
14. 14.🧺 Which of these is not needed for the fizzy balloon? (a) a balloon (b) a magnet (c) vinegar (d) an empty bottle
15. 15.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “the time we wait”? (a) we keep it the same (b) we measure it (c) we change it
16. 16.🧺 Do we need a magnet for the secret lemon message? (a) not needed (b) needed
17. 17.🛟 Which safety rule fits the fizzy balloon experiment? (a) shake it near your face (b) put it in your mouth (c) seal it in a glass jar (d) keep it away from eyes
18. 18.🧺 Do we need muddy water for the muddy water filter? (a) needed (b) not needed
19. 19.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “the kind of plant”? (a) we measure it (b) we change it (c) we keep it the same
20. 20.🧂 Which of these dissolves in water? (a) small pebbles (b) sawdust (c) table salt (d) cooking oil
21. 21.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the amount of salt”? (a) we change it (b) we keep it the same (c) we measure it
22. 22.🧺 Do we need an adult with an iron for the secret lemon message? (a) needed (b) not needed
23. 23.🪴 Which part of a plant does this job: give out water vapour? (a) flower (b) roots (c) stem (d) leaves
24. 24.🔮 The fizzing stops after a while. Why? (a) the balloon got cold (b) the gas froze (c) the bottle got tired (d) an ingredient ran out
25. 25.True or false: air is needed for a seed to sprout. (a) False (b) True
26. 26.True or false: curd is a base. (a) True (b) False
27. 27.🫧 Is soap solution an acid, a base or neutral? (a) neutral (b) an acid (c) a base
28. 28.🧺 Do we need a small bowl for sprouting seeds? (a) not needed (b) needed
29. 29.🔍 Which is the odd one out? (a) sugar (b) sunlight (c) soil (d) water
30. 30.🧺 Which of these is needed for the secret lemon message? (a) a balloon (b) a mirror (c) yeast (d) a cotton bud
31. 31.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a timer (b) cold water to rinse (c) a balloon (d) fresh cream
32. 32.🧺 Do we need a mirror for the secret lemon message? (a) needed (b) not needed
33. 33.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) freezing water (c) melting ice (d) milk turning to curd
34. 34.🍞 Does yeast need vinegar to make gas? (a) yeast needs it (b) yeast does not need it
35. 35.🌱 Is sugar needed for a seed to sprout? (a) not needed to sprout (b) needed to sprout
36. 36.🟡 Which of these turns turmeric reddish-brown? (a) lemon juice (b) plain water (c) soap solution (d) vinegar
37. 37.🧺 Do we need a rubber band for the leafy bag test? (a) not needed (b) needed
38. 38.🧺 Do we need fresh cream for making butter? (a) needed (b) not needed
39. 39.🧺 Which of these is needed for the turmeric test? (a) a magnet (b) white paper strips (c) a battery cell (d) a balloon
40. 40.📘 What do we call a seed starting to grow? (a) condensation (b) pollination (c) evaporation (d) germination

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