Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 305 · 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 does the lemon writing turn brown with heat? (a) heat adds colour (b) the iron is brown (c) the juice scorches first (d) paper turns lemony
2. 2.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny spheres (b) tiny cubes (c) tiny stars (d) tiny triangles
3. 3.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) sunlight (b) a mirror (c) a potted plant (d) a rubber band
4. 4.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “spoons of baking soda”? (a) we keep it the same (b) we measure it (c) we change it
5. 5.True or false: turmeric powder is needed for the leafy bag test. (a) False (b) True
6. 6.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) rusting iron (c) freezing water (d) baking a cake
7. 7.🔮 Predict: you pour muddy water through two layers of cloth instead of one. The water comes out ___. (a) muddier (b) salty (c) hot (d) clearer
8. 8.🧺 Which of these is needed for the muddy water filter? (a) a mirror (b) yeast (c) a magnet (d) muddy water
9. 9.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is kept the same. (a) True (b) False
10. 10.True or false: melting butter is a change that can be undone. (a) False (b) True
11. 11.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) a grown-up (c) a friend who is running (d) the youngest child
12. 12.🧺 Do we need a battery cell for the yeast balloon? (a) not needed (b) needed
13. 13.⚖️ 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 keep it the same (c) we change it
14. 14.⚖️ Fair test — do seeds need water to sprout? What do we do with “how many seeds sprout”? (a) we keep it the same (b) we change it (c) we measure it
15. 15.🍋 Why can’t you see the lemon writing once it dries? (a) the ink is magnetic (b) dry juice is see-through (c) the paper ate it (d) it turned into air
16. 16.🛟 What should you do after handling muddy water? (a) wipe hands on face (b) nothing is needed (c) lick your fingers (d) wash hands afterwards
17. 17.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the same cotton bud”? (a) we change it (b) we measure it (c) we keep it the same
18. 18.🧺 Which of these is needed for the turmeric test? (a) white paper strips (b) yeast (c) a battery cell (d) a comb
19. 19.True or false: a spoon is needed for growing salt crystals. (a) True (b) False
20. 20.🛟 Which safety rule fits the fizzy balloon experiment? (a) keep it away from eyes (b) put it in your mouth (c) shake it near your face (d) seal it in a glass jar
21. 21.🌱 What comes out of a moong seed first when it sprouts? (a) a thorn (b) a fruit (c) a tiny root (d) a flower
22. 22.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “time to make butter”? (a) we keep it the same (b) we change it (c) we measure it
23. 23.⚖️ Fair test — do seeds need water to sprout? What do we do with “the same place”? (a) we measure it (b) we change it (c) we keep it the same
24. 24.True or false: salt is not needed for growing salt crystals. (a) False (b) True
25. 25.🪴 Which part of a plant does this job: make food in sunlight? (a) flower (b) roots (c) leaves (d) stem
26. 26.🛟 The water for the yeast should be ___. (a) boiling hot (b) ice cold (c) very salty (d) warm, not hot
27. 27.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is kept the same? (a) the same funnel (b) how clear the water is (c) the filter material
28. 28.True or false: glucose powder dissolves in water. (a) False (b) True
29. 29.🫧 Which of these is neutral? (a) tamarind water (b) sugar water (c) curd (d) lemon juice
30. 30.🌱 Which of these sprouts in a few days? (a) seeds on dry cotton (b) seeds in the freezer (c) boiled seeds (d) seeds on wet cotton
31. 31.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is kept the same? (a) the filter material (b) how clear the water is (c) the same muddy water
32. 32.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns red (b) it turns black (c) it turns blue (d) it stays yellow
33. 33.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) baking soda (b) a balloon (c) vinegar (d) sugar
34. 34.🧺 Which of these is needed for the muddy water filter? (a) yeast (b) turmeric powder (c) a magnet (d) a clean glass
35. 35.🛟 Why must the jar lid be screwed on tightly? (a) so air gets out (b) so it turns yellow (c) so it gets hot (d) so cream does not spill
36. 36.🧺 Do we need vinegar for the leafy bag test? (a) needed (b) not needed
37. 37.True or false: warm water is something yeast does not need. (a) False (b) True
38. 38.⚖️ 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 cotton bud
39. 39.🧺 Which of these is needed for the fizzy balloon? (a) a balloon (b) a battery cell (c) a comb (d) sugar
40. 40.True or false: a mirror is not needed for sprouting seeds. (a) True (b) False

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