Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 765 · 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.🌱 Is soil needed for a seed to sprout? (a) needed to sprout (b) not needed to sprout
2. 2.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the liquid we test (b) the light we look in (c) the colour we see
3. 3.🛟 Why is a plastic jar a good choice for shaking? (a) it is magnetic (b) it is heavier (c) it will not break (d) it is hotter
4. 4.🧺 Which of these is not needed for the secret lemon message? (a) yeast (b) white paper (c) lemon juice (d) an adult with an iron
5. 5.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) sugar (c) warm water (d) a mirror
6. 6.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the number of drops (b) the turmeric paper (c) the liquid we test (d) the colour we see
7. 7.📘 What do we call a solution that cannot dissolve any more salt? (a) saturated (b) magnetic (c) empty (d) frozen
8. 8.🍞 Does yeast need salt to make gas? (a) yeast needs it (b) yeast does not need it
9. 9.True or false: chalk powder does not dissolve in water. (a) True (b) False
10. 10.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “sunny or shady place”? (a) we change it (b) we measure it (c) we keep it the same
11. 11.True or false: air is needed for a seed to sprout. (a) False (b) True
12. 12.🔮 Predict: you cover the dish so no water can escape. What happens? (a) crystals grow faster (b) it turns sweet (c) it fizzes (d) few or no crystals
13. 13.🛟 What should you do if vinegar splashes in your eye? (a) add baking soda (b) rinse with clean water (c) rub it hard (d) ignore it
14. 14.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) cotton or cloth (b) a funnel (c) a clean glass (d) a magnet
15. 15.🧈 Which of these is a change that cannot be undone? (a) melting butter (b) folding paper (c) freezing water (d) rusting iron
16. 16.🧺 Do we need a mirror for the secret lemon message? (a) not needed (b) needed
17. 17.🧂 Does sand dissolve in water? (a) dissolves in water (b) does not dissolve
18. 18.True or false: seeds in the freezer sprouts in a few days. (a) False (b) True
19. 19.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the water temperature is the one thing we change. (a) True (b) False
20. 20.True or false: hold the plant in soil is a job of the flower. (a) False (b) True
21. 21.🛟 Why should you never drink water just because it looks clear? (a) clear water is sweet (b) clear water is hot (c) germs are invisible (d) clear water is salty
22. 22.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is the one thing we change? (a) how dark the writing is (b) the kind of juice (c) the ironing time (d) the same paper
23. 23.🧺 Which of these is needed for the muddy water filter? (a) a battery cell (b) turmeric powder (c) a mirror (d) a funnel
24. 24.True or false: hold the plant in soil is a job of the roots. (a) False (b) True
25. 25.🫧 Is tamarind water an acid, a base or neutral? (a) a base (b) an acid (c) neutral
26. 26.🫧 Which of these is a base? (a) lemon juice (b) curd (c) baking soda water (d) sugar water
27. 27.⚖️ Fair test — do seeds need water to sprout? What do we do with “the same bowls”? (a) we keep it the same (b) we change it (c) we measure it
28. 28.🧈 Can this change be undone: baking a cake? (a) cannot be undone (b) can be undone
29. 29.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of water is kept the same. (a) False (b) True
30. 30.⚖️ 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
31. 31.🫧 Which of these is a base? (a) lemon juice (b) plain water (c) salt water (d) detergent water
32. 32.⚖️ Fair test — do seeds need water to sprout? Which of these is kept the same? (a) the same bowls (b) how many seeds sprout (c) wet or dry cotton
33. 33.⚖️ Fair test — do seeds need water to sprout? What do we do with “how many seeds sprout”? (a) we change it (b) we measure it (c) we keep it the same
34. 34.🧺 Which of these is not needed for sprouting seeds? (a) a balloon (b) moong seeds (c) cotton wool (d) water
35. 35.🔮 Predict: the adult irons for only one second. What happens? (a) it gets darker (b) writing turns green (c) writing stays faint (d) the paper floats
36. 36.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) a mirror (c) a shallow dish (d) turmeric powder
37. 37.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) sugar (c) a magnet (d) a small bottle
38. 38.🧈 Can this change be undone: cooking an egg? (a) cannot be undone (b) can be undone
39. 39.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: the size of the plant is kept the same. (a) False (b) True
40. 40.🧺 Do we need muddy water for the muddy water filter? (a) not needed (b) needed

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