Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 894 · 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.🌱 Why do the seeds on dry cotton not sprout? (a) they have no salt (b) they have no water (c) they have no soil (d) they are too wet
2. 2.🍞 Which of these is something yeast needs? (a) a magnet (b) sunlight (c) time (d) vinegar
3. 3.🫧 Which of these is a base? (a) sugar water (b) curd (c) detergent water (d) orange juice
4. 4.📘 Leaves have tiny holes that let out water vapour. What are they called? (a) roots (b) petals (c) stomata (d) veins
5. 5.🫧 Is lemon juice an acid, a base or neutral? (a) a base (b) neutral (c) an acid
6. 6.🫗 How do we separate gravel from fine sand? (a) sieving (b) evaporating (c) winnowing (d) filtering
7. 7.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? Which of these is the one thing we change? (a) amount of water drops (b) sun or shade (c) the same kind of bag (d) the kind of plant
8. 8.🧺 Which of these is needed for the muddy water filter? (a) cotton or cloth (b) a magnet (c) a battery cell (d) a mirror
9. 9.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it bursts at once (b) it grows much faster (c) it turns yellow (d) it grows very little
10. 10.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) sunny or shady place (b) the amount of salt (c) days to see crystals (d) the amount of water
11. 11.🛟 Some seeds from shops are coated with chemicals. What is the safe rule? (a) never put seeds in mouth (b) eat a few to check (c) throw them at friends (d) feed them to pets
12. 12.🔍 What do you see after shaking cream in a jar for a long time? (a) lumps of butter (b) sugar crystals (c) clear water only (d) bubbles of gas
13. 13.🔮 Predict: the jar is filled right to the top with cream. What happens? (a) it turns pink (b) it makes salt (c) it takes much longer (d) it is much faster
14. 14.True or false: orange juice is an acid. (a) False (b) True
15. 15.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) baking soda (b) a balloon (c) a comb (d) vinegar
16. 16.True or false: small stones from dal is done by handpicking. (a) False (b) True
17. 17.True or false: a magnet is needed for the leafy bag test. (a) True (b) False
18. 18.🪴 Where did the water inside the bag come from? (a) the rubber band (b) the plastic (c) the leaves (d) the rain
19. 19.🧂 Does small pebbles dissolve in water? (a) dissolves in water (b) does not dissolve
20. 20.🔮 Predict: a plant gets no water for many days in summer. What happens? (a) it flowers more (b) it grows faster (c) it turns blue (d) it wilts and droops
21. 21.🧈 Can this change be undone: freezing water? (a) can be undone (b) cannot be undone
22. 22.🛟 How should the plastic bag be tied around the branch? (a) as tight as possible (b) gently, not too tight (c) with a hot glue gun (d) with sharp wire
23. 23.True or false: sunlight is not needed for the leafy bag test. (a) False (b) True
24. 24.True or false: baking soda is needed for the fizzy balloon. (a) True (b) False
25. 25.🧺 Which of these is not needed for sprouting seeds? (a) a battery cell (b) a few days (c) a small bowl (d) water
26. 26.True or false: a balloon is needed for making butter. (a) False (b) True
27. 27.🔮 Predict: which gives more drops in the bag — a hot sunny day or a cool cloudy day? (a) neither of them (b) the cool cloudy day (c) both the same (d) the hot sunny day
28. 28.🍋 Which of these steps is a job a child can do? (a) putting the iron away (b) plugging in the iron (c) ironing the paper (d) reading the message
29. 29.🧺 Do we need a magnet for growing salt crystals? (a) not needed (b) needed
30. 30.⚖️ Fair test — do seeds need water to sprout? What do we do with “wet or dry cotton”? (a) we keep it the same (b) we measure it (c) we change it
31. 31.True or false: turmeric powder is not needed for growing salt crystals. (a) True (b) False
32. 32.True or false: warm water is something yeast does not need. (a) False (b) True
33. 33.⚖️ 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
34. 34.True or false: melting ice is a change that can be undone. (a) False (b) True
35. 35.🧺 Do we need a magnet for the muddy water filter? (a) needed (b) not needed
36. 36.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) water (c) lemon juice (d) yeast
37. 37.⚖️ Fair test — do seeds need water to sprout? Which of these is kept the same? (a) wet or dry cotton (b) how many seeds sprout (c) the same bowls
38. 38.🔮 Predict: seeds on wet cotton are kept in a dark cupboard. Will they sprout? (a) they turn to stones (b) yes, they sprout (c) no, never (d) they melt
39. 39.🧂 Does sawdust dissolve in water? (a) dissolves in water (b) does not dissolve
40. 40.True or false: lemon juice is an acid. (a) False (b) True

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