Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 896 · 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 tie a bag on a branch with no leaves. Will it collect much water? (a) exactly the same (b) much less water (c) it fills with soil (d) much more water
2. 2.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is kept the same? (a) the same paper (b) how dark the writing is (c) the kind of juice
3. 3.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) turmeric powder (c) sugar (d) warm water
4. 4.🌱 What comes out of a moong seed first when it sprouts? (a) a thorn (b) a tiny root (c) a fruit (d) a flower
5. 5.🔍 Muddy water is left still for an hour. What happens to the mud? (a) it sinks to the bottom (b) it turns to sand (c) it dissolves (d) it floats on top
6. 6.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) water (c) a magnet (d) lemon juice
7. 7.⚖️ 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 ironing time (c) the iron setting (d) the kind of juice
8. 8.🔍 What do you see inside the plastic bag after a few hours in the sun? (a) nothing at all (b) tiny insects (c) salt crystals (d) tiny water drops
9. 9.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) reddish (b) bright blue (c) white at once (d) green
10. 10.🔮 Predict: which gives more drops in the bag — a hot sunny day or a cool cloudy day? (a) the cool cloudy day (b) neither of them (c) both the same (d) the hot sunny day
11. 11.True or false: curd is an acid. (a) False (b) True
12. 12.⚖️ 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 measure it (b) we change it (c) we keep it the same
13. 13.🪴 Which of these is a job of the stem? (a) make seeds (b) take in water from soil (c) make food in sunlight (d) carry water upward
14. 14.🍋 Secret message: who does this step — dipping the cotton bud? (a) an adult does it (b) a child can do it
15. 15.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) water (c) turmeric powder (d) a balloon
16. 16.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) a funnel (b) cotton or cloth (c) a balloon (d) muddy water
17. 17.🛟 The water for the yeast should be ___. (a) very salty (b) boiling hot (c) warm, not hot (d) ice cold
18. 18.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a balloon (c) warm water (d) a spoon
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 size of the plant”? (a) we change it (b) we keep it the same (c) we measure it
20. 20.🔍 Which is the odd one out? (a) cooking oil (b) sand (c) chalk powder (d) sugar
21. 21.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) melting butter (c) cooking an egg (d) rusting iron
22. 22.True or false: melting ice is a change that cannot be undone. (a) False (b) True
23. 23.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) rusting iron (c) melting ice (d) melting butter
24. 24.🧈 What is the watery liquid left after the butter forms? (a) honey (b) oil (c) buttermilk (d) vinegar
25. 25.⚖️ Fair test — do seeds need water to sprout? Which of these is what we measure? (a) the same place (b) the number of seeds (c) the kind of seeds (d) how many seeds sprout
26. 26.True or false: fresh cream is not needed for making butter. (a) True (b) False
27. 27.🧺 Do we need fresh cream for making butter? (a) needed (b) not needed
28. 28.🫧 Is plain water an acid, a base or neutral? (a) a base (b) neutral (c) an acid
29. 29.🍞 Where is yeast used in the kitchen? (a) to make bread rise (b) to colour rice (c) to wash dishes (d) to clean floors
30. 30.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) folding paper (c) browning lemon ink (d) milk turning to curd
31. 31.🪴 Which part of a plant does this job: make seeds? (a) roots (b) leaves (c) stem (d) flower
32. 32.⚖️ 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 measure it (b) we keep it the same (c) we change it
33. 33.🫧 Is salt water an acid, a base or neutral? (a) neutral (b) an acid (c) a base
34. 34.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a balloon (b) an empty bottle (c) a mirror (d) a funnel or spoon
35. 35.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “sun or shade”? (a) we change it (b) we keep it the same (c) we measure it
36. 36.🔮 Predict: a plant gets no water for many days in summer. What happens? (a) it wilts and droops (b) it flowers more (c) it turns blue (d) it grows faster
37. 37.⚖️ Fair test — do seeds need water to sprout? Which of these is the one thing we change? (a) the same place (b) the same bowls (c) how many seeds sprout (d) wet or dry cotton
38. 38.True or false: tamarind water is a base. (a) True (b) False
39. 39.True or false: gravel from fine sand is done by sieving. (a) False (b) True
40. 40.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the same paper is the one thing we change. (a) True (b) False

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