Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 485 · 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.🧈 Which of these is a change that can be undone? (a) rusting iron (b) milk turning to curd (c) baking a cake (d) melting ice
2. 2.True or false: reading the message is a job for an adult. (a) False (b) True
3. 3.🫧 Which of these is neutral? (a) curd (b) sugar water (c) orange juice (d) soap solution
4. 4.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows much faster (b) it grows very little (c) it turns yellow (d) it bursts at once
5. 5.⚖️ Fair test — do seeds need water to sprout? What do we do with “the same bowls”? (a) we change it (b) we measure it (c) we keep it the same
6. 6.🧂 Which of these dissolves in water? (a) small pebbles (b) sawdust (c) sand (d) baking soda
7. 7.🧺 Do we need sugar for the yeast balloon? (a) needed (b) not needed
8. 8.🔍 Which is the odd one out? (a) letting the paper dry (b) cutting the lemon (c) dipping the cotton bud (d) writing the message
9. 9.🧂 Does small pebbles dissolve in water? (a) dissolves in water (b) does not dissolve
10. 10.🫧 Is sugar water an acid, a base or neutral? (a) neutral (b) a base (c) an acid
11. 11.🛟 Who should pour the warm water for the crystal experiment? (a) a friend who is running (b) the youngest child (c) a grown-up (d) nobody needs to
12. 12.🧺 Do we need moong seeds for sprouting seeds? (a) needed (b) not needed
13. 13.📘 Is the fizzing a sign that a new substance is made? (a) it is only dissolving (b) it is only melting (c) no, nothing changes (d) yes, a new gas forms
14. 14.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) liquid crystals (b) bigger crystals (c) no crystals (d) smaller crystals
15. 15.🍋 Which of these steps is a job a child can do? (a) ironing the paper (b) reading the message (c) cutting the lemon (d) plugging in the iron
16. 16.🔍 Which is the odd one out? (a) baking soda water (b) vinegar (c) orange juice (d) curd
17. 17.🌱 Which of these does not sprout? (a) wet seeds by a window (b) wet seeds in the dark (c) seeds on wet cotton (d) seeds on dry cotton
18. 18.True or false: milk turning to curd is a change that cannot be undone. (a) True (b) False
19. 19.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it fizzes (b) it turns sweet (c) few or no crystals (d) crystals grow faster
20. 20.🧺 Do we need water for the turmeric test? (a) needed (b) not needed
21. 21.🟡 Which of these keeps turmeric yellow? (a) baking soda water (b) detergent water (c) soap solution (d) sugar water
22. 22.True or false: turmeric powder is needed for the secret lemon message. (a) False (b) True
23. 23.🧈 Can this change be undone: rusting iron? (a) cannot be undone (b) can be undone
24. 24.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a jar with a tight lid (b) a magnet (c) fresh cream (d) a bowl
25. 25.True or false: a mirror is needed for the turmeric test. (a) True (b) False
26. 26.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is the one thing we change. (a) False (b) True
27. 27.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it grows faster (b) the yeast is killed (c) it glows (d) it turns to sugar
28. 28.🧈 Can this change be undone: freezing water? (a) can be undone (b) cannot be undone
29. 29.🛟 What should you do after handling muddy water? (a) wash hands afterwards (b) nothing is needed (c) lick your fingers (d) wipe hands on face
30. 30.🧺 Which of these is needed for the secret lemon message? (a) turmeric powder (b) an adult with an iron (c) a magnet (d) a balloon
31. 31.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the amount of water”? (a) we keep it the same (b) we change it (c) we measure it
32. 32.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the same cotton bud”? (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 “the filter material”? (a) we keep it the same (b) we measure it (c) we change it
34. 34.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) white at once (b) bright blue (c) green (d) reddish
35. 35.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the liquid we test (b) the number of drops (c) the colour we see (d) the light we look in
36. 36.🧺 Which of these is not needed for making butter? (a) cold water to rinse (b) a magnet (c) fresh cream (d) a bowl
37. 37.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) the amount of water (b) sunny or shady place (c) the same dish (d) days to see crystals
38. 38.🧺 Which of these is not needed for the fizzy balloon? (a) a magnet (b) a balloon (c) baking soda (d) an empty bottle
39. 39.🎈 What blows up the balloon in the yeast experiment? (a) steam (b) air from outside (c) smoke (d) carbon dioxide gas
40. 40.🔍 Which is the odd one out? (a) detergent water (b) soap solution (c) sugar water (d) baking soda water

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