Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 159 · 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.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is kept the same. (a) False (b) True
2. 2.🧺 Do we need a battery cell for the leafy bag test? (a) not needed (b) needed
3. 3.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny cubes (b) tiny spheres (c) tiny triangles (d) tiny stars
4. 4.🧺 Which of these is needed for sprouting seeds? (a) a magnet (b) water (c) a mirror (d) a battery cell
5. 5.🛟 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
6. 6.True or false: a small bottle is needed for the yeast balloon. (a) True (b) False
7. 7.🧺 Which of these is needed for the fizzy balloon? (a) sugar (b) a seed (c) a mirror (d) an empty bottle
8. 8.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the same glass”? (a) we keep it the same (b) we measure it (c) we change it
9. 9.🧺 Do we need a dropper or spoon for the turmeric test? (a) needed (b) not needed
10. 10.🧂 Which of these dissolves in water? (a) sawdust (b) cooking oil (c) chalk powder (d) baking soda
11. 11.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows very little (b) it bursts at once (c) it grows much faster (d) it turns yellow
12. 12.⚖️ Fair test — do seeds need water to sprout? What do we do with “the same bowls”? (a) we change it (b) we keep it the same (c) we measure it
13. 13.🔍 Which is the odd one out? (a) melting butter (b) folding paper (c) rusting iron (d) freezing water
14. 14.True or false: a mirror is not needed for the yeast balloon. (a) True (b) False
15. 15.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
16. 16.🍞 Why do we add sugar to the yeast? (a) to make it heavy (b) it is food for yeast (c) to make it sweet (d) to colour it
17. 17.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) vinegar (b) a funnel or spoon (c) an empty bottle (d) a mirror
18. 18.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: amount of water drops is what we measure. (a) True (b) False
19. 19.🛟 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
20. 20.🍞 Where is yeast used in the kitchen? (a) to colour rice (b) to make bread rise (c) to wash dishes (d) to clean floors
21. 21.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) white paper (b) a small bowl (c) a battery cell (d) an adult with an iron
22. 22.🔍 Which is the odd one out? (a) orange juice (b) lemon juice (c) detergent water (d) tamarind water
23. 23.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? Which of these is the one thing we change? (a) sun or shade (b) the same kind of bag (c) the size of the plant (d) amount of water drops
24. 24.📘 Leaves have tiny holes that let out water vapour. What are they called? (a) petals (b) roots (c) veins (d) stomata
25. 25.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: the amount of cream is the one thing we change. (a) True (b) False
26. 26.True or false: sugar water is a base. (a) False (b) True
27. 27.🔮 Predict: the adult irons for only one second. What happens? (a) the paper floats (b) writing turns green (c) it gets darker (d) writing stays faint
28. 28.True or false: folding paper is a change that cannot be undone. (a) True (b) False
29. 29.🫧 Is detergent water an acid, a base or neutral? (a) an acid (b) neutral (c) a base
30. 30.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) vinegar (b) a balloon (c) a tray for spills (d) a comb
31. 31.🧺 Which of these is needed for the muddy water filter? (a) a clean glass (b) turmeric powder (c) a magnet (d) a battery cell
32. 32.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) yeast (c) warm water (d) turmeric powder
33. 33.True or false: a mirror is not needed for making butter. (a) True (b) False
34. 34.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) yeast (c) a dropper or spoon (d) white paper strips
35. 35.🔍 Which is the odd one out? (a) lemon juice (b) salt water (c) soap solution (d) sugar water
36. 36.🧺 Do we need yeast for making butter? (a) needed (b) not needed
37. 37.🧺 Do we need a mirror for the turmeric test? (a) not needed (b) needed
38. 38.⚖️ Fair test — do seeds need water to sprout? True or false: the number of seeds is kept the same. (a) True (b) False
39. 39.🟡 Turmeric paper meets sugar water. What happens? (a) stays yellow (b) turns reddish-brown
40. 40.🫧 Is lemon juice an acid, a base or neutral? (a) neutral (b) a base (c) an acid

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