Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 267 · 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.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
2. 2.🌱 Is water needed for a seed to sprout? (a) needed to sprout (b) not needed to sprout
3. 3.🛟 What should you do after handling muddy water? (a) lick your fingers (b) wipe hands on face (c) nothing is needed (d) wash hands afterwards
4. 4.🔍 Which is the odd one out? (a) sugar (b) vinegar (c) warm water (d) time
5. 5.🫧 Is tamarind water an acid, a base or neutral? (a) neutral (b) an acid (c) a base
6. 6.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: size of the balloon is what we measure. (a) False (b) True
7. 7.🫗 Muddy water is poured through a cloth filter. What stays on the cloth? (a) the water (b) nothing (c) the mud (d) the salt
8. 8.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) an empty bottle (b) a comb (c) a balloon (d) baking soda
9. 9.True or false: tamarind water is an acid. (a) False (b) True
10. 10.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) baking soda (b) a balloon (c) a mirror (d) an empty bottle
11. 11.True or false: warm water is not needed for the yeast balloon. (a) False (b) True
12. 12.🧺 Which of these is not needed for the muddy water filter? (a) a mirror (b) cotton or cloth (c) sand and pebbles (d) a funnel
13. 13.🪴 Which of these is a job of the roots? (a) make seeds (b) take in water from soil (c) hold up the leaves (d) make food in sunlight
14. 14.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny stars (b) tiny cubes (c) tiny spheres (d) tiny triangles
15. 15.True or false: dry yeast is not needed for the yeast balloon. (a) True (b) False
16. 16.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the water temperature”? (a) we measure it (b) we change it (c) we keep it the same
17. 17.🪴 Which part of a plant does this job: hold up the leaves? (a) stem (b) flower (c) roots (d) leaves
18. 18.True or false: vinegar is an acid. (a) False (b) True
19. 19.🫧 Which of these is neutral? (a) orange juice (b) curd (c) lemon juice (d) sugar water
20. 20.🔮 Predict: the adult irons for only one second. What happens? (a) writing turns green (b) it gets darker (c) writing stays faint (d) the paper floats
21. 21.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the light we look in”? (a) we measure it (b) we change it (c) we keep it the same
22. 22.🫧 Which of these is neutral? (a) lemon juice (b) soap solution (c) tamarind water (d) plain water
23. 23.🧺 Which of these is needed for the yeast balloon? (a) a paper clip (b) warm water (c) a mirror (d) turmeric powder
24. 24.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “how clear the water is”? (a) we measure it (b) we keep it the same (c) we change it
25. 25.🧺 Do we need a spoon for growing salt crystals? (a) not needed (b) needed
26. 26.True or false: cooking oil dissolves in water. (a) False (b) True
27. 27.⚖️ Fair test — do seeds need water to sprout? What do we do with “the same bowls”? (a) we measure it (b) we keep it the same (c) we change it
28. 28.🧺 Do we need moong seeds for sprouting seeds? (a) not needed (b) needed
29. 29.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) bright blue (b) green (c) white at once (d) reddish
30. 30.🔍 Which is the odd one out? (a) salt (b) warmth (c) sugar (d) sunlight
31. 31.True or false: hold the plant in soil is a job of the roots. (a) True (b) False
32. 32.True or false: orange juice is an acid. (a) True (b) False
33. 33.True or false: a balloon is not needed for sprouting seeds. (a) True (b) False
34. 34.True or false: a magnet is not needed for the muddy water filter. (a) True (b) False
35. 35.True or false: an empty bottle is needed for the fizzy balloon. (a) False (b) True
36. 36.True or false: a cotton bud is not needed for the secret lemon message. (a) True (b) False
37. 37.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is what we measure? (a) the same paper (b) the kind of juice (c) how dark the writing is (d) the iron setting
38. 38.🪴 Which part of a plant does this job: make food in sunlight? (a) stem (b) roots (c) leaves (d) flower
39. 39.🧺 Do we need a battery cell for making butter? (a) not needed (b) needed
40. 40.🧺 Do we need a tray for spills for the fizzy balloon? (a) needed (b) not needed

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