Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 359 · 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: the adult irons for only one second. What happens? (a) writing turns green (b) it gets darker (c) the paper floats (d) writing stays faint
2. 2.🔍 Which is the odd one out? (a) salt (b) sunlight (c) soil (d) water
3. 3.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is kept the same. (a) False (b) True
4. 4.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: the same kind of bag is kept the same. (a) True (b) False
5. 5.True or false: dissolving salt is a change that cannot be undone. (a) False (b) True
6. 6.🛟 The water for the yeast should be ___. (a) very salty (b) warm, not hot (c) boiling hot (d) ice cold
7. 7.⚖️ 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) the amount of salt (c) days to see crystals (d) sunny or shady place
8. 8.🔮 Predict: a plant gets no water for many days in summer. What happens? (a) it flowers more (b) it turns blue (c) it wilts and droops (d) it grows faster
9. 9.🧺 Which of these is needed for the fizzy balloon? (a) a battery cell (b) a comb (c) a magnet (d) baking soda
10. 10.🔮 Predict: you use more vinegar and more baking soda. What happens to the balloon? (a) it turns blue (b) it shrinks (c) it grows bigger (d) there is no change
11. 11.🫗 How do we separate small stones from dal? (a) evaporating (b) handpicking (c) filtering (d) winnowing
12. 12.🧂 Does sugar dissolve in water? (a) does not dissolve (b) dissolves in water
13. 13.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “spoons of baking soda”? (a) we change it (b) we measure it (c) we keep it the same
14. 14.🛟 Which safety rule fits the fizzy balloon experiment? (a) put it in your mouth (b) seal it in a glass jar (c) keep it away from eyes (d) shake it near your face
15. 15.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “the cream temperature”? (a) we change it (b) we measure it (c) we keep it the same
16. 16.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) cotton or cloth (b) a battery cell (c) a funnel (d) sand and pebbles
17. 17.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the kind of juice”? (a) we keep it the same (b) we measure it (c) we change it
18. 18.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the amount of yeast”? (a) we keep it the same (b) we measure it (c) we change it
19. 19.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a balloon (b) a seed (c) baking soda (d) an empty bottle
20. 20.🛟 What should you do after handling muddy water? (a) nothing is needed (b) wipe hands on face (c) lick your fingers (d) wash hands afterwards
21. 21.🔮 Predict: you pour muddy water through two layers of cloth instead of one. The water comes out ___. (a) muddier (b) clearer (c) hot (d) salty
22. 22.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) freezing water (c) milk turning to curd (d) folding paper
23. 23.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “the amount of cream”? (a) we keep it the same (b) we change it (c) we measure it
24. 24.🌱 Which of these does not sprout? (a) wet seeds by a window (b) seeds on wet cotton (c) boiled seeds (d) wet seeds in the dark
25. 25.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the iron setting”? (a) we measure it (b) we change it (c) we keep it the same
26. 26.True or false: melting ice is a change that can be undone. (a) True (b) False
27. 27.⚖️ 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 measure it (b) we keep it the same (c) we change it
28. 28.🫧 Is curd an acid, a base or neutral? (a) neutral (b) an acid (c) a base
29. 29.🧺 Do we need white paper strips for the turmeric test? (a) needed (b) not needed
30. 30.🧺 Do we need sand and pebbles for the muddy water filter? (a) needed (b) not needed
31. 31.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) a mirror (b) muddy water (c) a funnel (d) sand and pebbles
32. 32.🧺 Which of these is not needed for the turmeric test? (a) turmeric powder (b) a dropper or spoon (c) a mirror (d) water
33. 33.True or false: freezing water is a change that can be undone. (a) False (b) True
34. 34.🔍 Which is the odd one out? (a) melting butter (b) freezing water (c) melting ice (d) browning lemon ink
35. 35.🧈 Can this change be undone: melting ice? (a) can be undone (b) cannot be undone
36. 36.True or false: turmeric powder is not needed for sprouting seeds. (a) False (b) True
37. 37.True or false: putting the iron away is a job for an adult. (a) False (b) True
38. 38.🛟 Who should use the hot iron in the secret message experiment? (a) whoever is fastest (b) only an adult (c) any child (d) the youngest child
39. 39.🍞 Which of these is something yeast needs? (a) salt (b) sunlight (c) a magnet (d) sugar
40. 40.🛟 Why should you never drink water just because it looks clear? (a) germs are invisible (b) clear water is hot (c) clear water is salty (d) clear water is sweet

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