Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 510 · 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.🫧 Is salt water an acid, a base or neutral? (a) a base (b) an acid (c) neutral
2. 2.🔍 Which is the odd one out? (a) folding paper (b) freezing water (c) melting ice (d) cooking an egg
3. 3.🧺 Do we need an adult with an iron for the secret lemon message? (a) needed (b) not needed
4. 4.🛟 What should you do if vinegar splashes in your eye? (a) ignore it (b) rub it hard (c) add baking soda (d) rinse with clean water
5. 5.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “the same kind of bag”? (a) we measure it (b) we keep it the same (c) we change it
6. 6.⚖️ 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
7. 7.True or false: take in water from soil is a job of the stem. (a) False (b) True
8. 8.🌱 Which of these is needed for a seed to sprout? (a) soil (b) water (c) salt (d) sugar
9. 9.🧺 Which of these is not needed for the secret lemon message? (a) a small bowl (b) an adult with an iron (c) a magnet (d) lemon juice
10. 10.🧺 Which of these is needed for the turmeric test? (a) a balloon (b) a comb (c) white paper strips (d) a magnet
11. 11.📘 The browning of lemon juice with heat is a ___ change. (a) physical (b) chemical (c) magnetic (d) musical
12. 12.🧺 Do we need an empty bottle for the fizzy balloon? (a) needed (b) not needed
13. 13.🔍 Which is the odd one out? (a) curd (b) plain water (c) vinegar (d) orange juice
14. 14.🛟 Who should use the hot iron in the secret message experiment? (a) any child (b) the youngest child (c) whoever is fastest (d) only an adult
15. 15.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns black (b) it stays yellow (c) it turns blue (d) it turns red
16. 16.🛟 What should you do after handling muddy water? (a) nothing is needed (b) wipe hands on face (c) wash hands afterwards (d) lick your fingers
17. 17.🍋 Secret message: who does this step — dipping the cotton bud? (a) an adult does it (b) a child can do it
18. 18.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) a few days (b) a battery cell (c) water (d) a small bowl
19. 19.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is what we measure? (a) the cream temperature (b) the amount of cream (c) the same jar (d) time to make butter
20. 20.⚖️ Fair test — do seeds need water to sprout? Which of these is what we measure? (a) the number of seeds (b) how many seeds sprout (c) the same bowls (d) the kind of seeds
21. 21.True or false: yeast is needed for the turmeric test. (a) False (b) True
22. 22.🔍 Which is the odd one out? (a) cutting the lemon (b) ironing the paper (c) reading the message (d) plugging in the iron
23. 23.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it turns to bread (b) it shrinks to nothing (c) the balloon is smaller (d) the balloon is bigger
24. 24.🧺 Do we need a mirror for the secret lemon message? (a) not needed (b) needed
25. 25.🫧 Which gas fills the balloon in the baking soda and vinegar experiment? (a) carbon dioxide (b) helium (c) hydrogen (d) oxygen
26. 26.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) bigger crystals (b) liquid crystals (c) no crystals (d) smaller crystals
27. 27.🫗 Which of these is done by handpicking? (a) small stones from dal (b) mud from water (c) tea leaves from tea (d) bran from wheat flour
28. 28.📘 What do we call plants giving out water vapour from their leaves? (a) germination (b) transpiration (c) reflection (d) digestion
29. 29.🛟 Which safety rule fits the fizzy balloon experiment? (a) put it in your mouth (b) shake it near your face (c) seal it in a glass jar (d) keep it away from eyes
30. 30.True or false: curd is an acid. (a) True (b) False
31. 31.True or false: husk from rice grain is done by sieving. (a) False (b) True
32. 32.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “size of the balloon”? (a) we keep it the same (b) we measure it (c) we change it
33. 33.⚖️ 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 change it (b) we measure it (c) we keep it the same
34. 34.🔍 Which is the odd one out? (a) sugar water (b) soap solution (c) tamarind water (d) plain water
35. 35.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) turmeric powder (c) a piece of string (d) a magnet
36. 36.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) muddy water (b) a funnel (c) sand and pebbles (d) a magnet
37. 37.🧺 Which of these is needed for the turmeric test? (a) water (b) a battery cell (c) yeast (d) a comb
38. 38.True or false: a few hours is not needed for the leafy bag test. (a) False (b) True
39. 39.True or false: white paper is not needed for the secret lemon message. (a) False (b) True
40. 40.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is what we measure. (a) False (b) True

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