Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 69 · 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 — does lemon juice or orange juice make darker secret writing? Which of these is the one thing we change? (a) the same paper (b) the iron setting (c) the kind of juice (d) the same cotton bud
2. 2.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the kind of juice is the one thing we change. (a) True (b) False
3. 3.🧂 Why do we stir in salt until no more will dissolve? (a) to cool the water (b) to make it very salty (c) to make it fizz (d) to change its colour
4. 4.True or false: white paper is needed for the secret lemon message. (a) False (b) True
5. 5.⚖️ Fair test — do seeds need water to sprout? Which of these is the one thing we change? (a) the same bowls (b) the kind of seeds (c) wet or dry cotton (d) the number of seeds
6. 6.🔍 Which is the odd one out? (a) putting the iron away (b) plugging in the iron (c) ironing the paper (d) writing the message
7. 7.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “how dark the writing is”? (a) we keep it the same (b) we measure it (c) we change it
8. 8.True or false: a mirror is needed for the muddy water filter. (a) False (b) True
9. 9.🔮 Predict: you use plain water instead of vinegar. What happens? (a) it turns to honey (b) very little fizzing (c) the balloon bursts (d) a huge eruption
10. 10.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is what we measure? (a) the filter material (b) the same glass (c) how clear the water is (d) the same funnel
11. 11.🫧 Is detergent water an acid, a base or neutral? (a) an acid (b) neutral (c) a base
12. 12.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: the time we wait is kept the same. (a) False (b) True
13. 13.🔍 Which is the odd one out? (a) baking soda water (b) orange juice (c) soap solution (d) detergent water
14. 14.🫧 Is salt water an acid, a base or neutral? (a) a base (b) neutral (c) an acid
15. 15.🪴 Which of these is a job of the roots? (a) give out water vapour (b) hold the plant in soil (c) carry water upward (d) make seeds
16. 16.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) browning lemon ink (c) freezing water (d) folding paper
17. 17.🧺 Which of these is not needed for the leafy bag test? (a) sunlight (b) a clear plastic bag (c) a magnet (d) a rubber band
18. 18.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the iron setting”? (a) we keep it the same (b) we measure it (c) we change it
19. 19.🔍 Which is the odd one out? (a) reading the message (b) cutting the lemon (c) writing the message (d) dipping the cotton bud
20. 20.True or false: seeds in the freezer sprouts in a few days. (a) True (b) False
21. 21.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) the balloon is bigger (b) it shrinks to nothing (c) it turns to bread (d) the balloon is smaller
22. 22.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the filter material”? (a) we keep it the same (b) we measure it (c) we change it
23. 23.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) dry yeast (c) turmeric powder (d) a small bottle
24. 24.True or false: dipping the cotton bud is a job a child can do. (a) True (b) False
25. 25.🔍 Which is the odd one out? (a) time (b) sugar (c) warm water (d) sunlight
26. 26.📘 What do we call a solution that cannot dissolve any more salt? (a) empty (b) frozen (c) saturated (d) magnetic
27. 27.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a funnel or spoon (b) a magnet (c) an empty bottle (d) vinegar
28. 28.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the same bottles is the one thing we change. (a) False (b) True
29. 29.🧺 Which of these is not needed for the turmeric test? (a) lemon juice (b) a magnet (c) turmeric powder (d) white paper strips
30. 30.🫧 Which of these is neutral? (a) curd (b) plain water (c) lemon juice (d) tamarind water
31. 31.🧺 Which of these is needed for making butter? (a) a balloon (b) yeast (c) a mirror (d) cold water to rinse
32. 32.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) the same bottles (b) the water temperature (c) size of the balloon
33. 33.🧺 Do we need a small bottle for the yeast balloon? (a) needed (b) not needed
34. 34.⚖️ 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) days to see crystals (c) sunny or shady place (d) the amount of water
35. 35.🛟 What should you do after handling muddy water? (a) wash hands afterwards (b) wipe hands on face (c) lick your fingers (d) nothing is needed
36. 36.🛟 Which rule keeps the turmeric test safe? (a) use only kitchen items (b) sip each liquid (c) sniff each bottle hard (d) mix bathroom cleaners
37. 37.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a seed (b) an empty bottle (c) baking soda (d) vinegar
38. 38.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) a small bowl (b) cotton wool (c) a magnet (d) a few days
39. 39.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the colour we see (b) the liquid we test (c) the turmeric paper
40. 40.🍋 Secret message: who does this step — plugging in the iron? (a) a child can do it (b) an adult does it

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