Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 331 · 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.🛟 Who should use the hot iron in the secret message experiment? (a) only an adult (b) any child (c) the youngest child (d) whoever is fastest
2. 2.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a cotton bud (b) lemon juice (c) a magnet (d) a small bowl
3. 3.🔮 Predict: seeds on wet cotton are kept in a dark cupboard. Will they sprout? (a) they turn to stones (b) they melt (c) yes, they sprout (d) no, never
4. 4.🧺 Do we need a bowl for making butter? (a) not needed (b) needed
5. 5.True or false: sawdust does not dissolve in water. (a) True (b) False
6. 6.🎈 Why does the balloon blow up? (a) outside air gets in (b) gas is made inside (c) the bottle shrinks (d) vinegar is hot
7. 7.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) salt (c) a magnet (d) warm water
8. 8.🔮 Predict: the jar is filled right to the top with cream. What happens? (a) it makes salt (b) it turns pink (c) it is much faster (d) it takes much longer
9. 9.True or false: baking soda water keeps turmeric yellow. (a) True (b) False
10. 10.🧺 Do we need a comb for the fizzy balloon? (a) needed (b) not needed
11. 11.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) no crystals (c) bigger crystals (d) liquid crystals
12. 12.🧺 Do we need white paper strips for the turmeric test? (a) needed (b) not needed
13. 13.True or false: a battery cell is needed for making butter. (a) True (b) False
14. 14.True or false: turmeric powder is needed for sprouting seeds. (a) True (b) False
15. 15.🔮 Predict: you tie a bag on a branch with no leaves. Will it collect much water? (a) it fills with soil (b) much more water (c) exactly the same (d) much less water
16. 16.🔮 Predict: sprouts grow in the dark for a week. What colour are their leaves? (a) blue (b) pale yellow (c) bright red (d) dark green
17. 17.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is kept the same? (a) the kind of juice (b) how dark the writing is (c) the same paper
18. 18.🫧 Is tamarind water an acid, a base or neutral? (a) neutral (b) a base (c) an acid
19. 19.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) soap solution (c) a magnet (d) white paper strips
20. 20.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) cooking an egg (c) freezing water (d) melting ice
21. 21.True or false: a balloon is not needed for the muddy water filter. (a) False (b) True
22. 22.🔮 Predict: you use more vinegar and more baking soda. What happens to the balloon? (a) it grows bigger (b) it turns blue (c) there is no change (d) it shrinks
23. 23.🧺 Which of these is needed for the leafy bag test? (a) a clear plastic bag (b) vinegar (c) a battery cell (d) turmeric powder
24. 24.🫗 How do we separate chaff from wheat grain? (a) handpicking (b) sieving (c) evaporating (d) winnowing
25. 25.🧂 Why do crystals appear as the dish dries? (a) salt eats water (b) the dish melts (c) salt grows roots (d) water evaporates
26. 26.🔮 Predict: you filter salty water through cloth. Does the salt stay on the cloth? (a) it turns to sand (b) yes, all of it (c) no, salt passes through (d) it turns to sugar
27. 27.🫗 Muddy water is poured through a cloth filter. What stays on the cloth? (a) the mud (b) the salt (c) nothing (d) the water
28. 28.🔍 Which is the odd one out? (a) vinegar (b) orange juice (c) plain water (d) lemon juice
29. 29.🪴 Which part of a plant does this job: hold the plant in soil? (a) stem (b) roots (c) leaves (d) flower
30. 30.⚖️ 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 keep it the same (c) we measure it
31. 31.True or false: wet seeds in the dark does not sprout. (a) True (b) False
32. 32.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) the same dish (b) sunny or shady place (c) days to see crystals
33. 33.True or false: folding paper is a change that cannot be undone. (a) True (b) False
34. 34.True or false: soap solution is a base. (a) False (b) True
35. 35.🔍 What do you see inside the plastic bag after a few hours in the sun? (a) tiny water drops (b) salt crystals (c) tiny insects (d) nothing at all
36. 36.🔍 Which is the odd one out? (a) salt (b) warm water (c) sugar (d) time
37. 37.🧺 Do we need baking soda for the fizzy balloon? (a) not needed (b) needed
38. 38.🛟 Why must children keep their fingers away from the iron? (a) it is sticky (b) it can burn skin (c) it is magnetic (d) it is cold
39. 39.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the same paper”? (a) we change it (b) we measure it (c) we keep it the same
40. 40.True or false: tamarind water is a base. (a) False (b) True

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