Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 856 · 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 not needed for the fizzy balloon? (a) an empty bottle (b) a funnel or spoon (c) a mirror (d) vinegar
2. 2.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) cooking an egg (c) freezing water (d) milk turning to curd
3. 3.🔍 What do you see after shaking cream in a jar for a long time? (a) clear water only (b) sugar crystals (c) lumps of butter (d) bubbles of gas
4. 4.🧺 Do we need water for sprouting seeds? (a) needed (b) not needed
5. 5.🧺 Do we need a clean glass for the muddy water filter? (a) not needed (b) needed
6. 6.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) the water temperature (b) size of the balloon (c) the same bottles
7. 7.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a mirror (c) a balloon (d) warm water
8. 8.True or false: a tray for spills is needed for the fizzy balloon. (a) False (b) True
9. 9.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the amount of vinegar”? (a) we change it (b) we measure it (c) we keep it the same
10. 10.🧺 Which of these is not needed for the leafy bag test? (a) a potted plant (b) a rubber band (c) a mirror (d) a clear plastic bag
11. 11.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: how dark the writing is is what we measure. (a) True (b) False
12. 12.True or false: a comb is needed for the fizzy balloon. (a) False (b) True
13. 13.🧺 Do we need lemon juice for the secret lemon message? (a) not needed (b) needed
14. 14.🌱 Which of these is needed for a seed to sprout? (a) water (b) sugar (c) sunlight (d) salt
15. 15.🎈 Why does the balloon blow up? (a) the bottle shrinks (b) gas is made inside (c) vinegar is hot (d) outside air gets in
16. 16.🔍 Which is the odd one out? (a) plain water (b) sugar water (c) salt water (d) vinegar
17. 17.🛟 What should you do if vinegar splashes in your eye? (a) add baking soda (b) rub it hard (c) rinse with clean water (d) ignore it
18. 18.True or false: a battery cell is not needed for the leafy bag test. (a) False (b) True
19. 19.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: sun or shade is the one thing we change. (a) True (b) False
20. 20.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it stays yellow (b) it turns blue (c) it turns red (d) it turns black
21. 21.⚖️ 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) True (b) False
22. 22.🧺 Do we need sand and pebbles for the muddy water filter? (a) not needed (b) needed
23. 23.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “how hard we shake”? (a) we keep it the same (b) we change it (c) we measure it
24. 24.True or false: a few days is needed for sprouting seeds. (a) False (b) True
25. 25.🛟 Who should use the hot iron in the secret message experiment? (a) whoever is fastest (b) the youngest child (c) any child (d) only an adult
26. 26.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “sun or shade”? (a) we change it (b) we measure it (c) we keep it the same
27. 27.🌱 Which of these sprouts in a few days? (a) seeds on wet cotton (b) boiled seeds (c) seeds in the freezer (d) seeds on dry cotton
28. 28.True or false: curd is a base. (a) False (b) True
29. 29.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a piece of string (c) turmeric powder (d) a spoon
30. 30.🫧 Is curd an acid, a base or neutral? (a) an acid (b) neutral (c) a base
31. 31.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: size of the balloon is kept the same. (a) True (b) False
32. 32.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) white paper strips (b) turmeric powder (c) soap solution (d) a mirror
33. 33.True or false: cooking an egg is a change that can be undone. (a) False (b) True
34. 34.True or false: a small bowl is not needed for the secret lemon message. (a) False (b) True
35. 35.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a small bowl (b) lemon juice (c) a magnet (d) an adult with an iron
36. 36.True or false: baking soda water keeps turmeric yellow. (a) True (b) False
37. 37.True or false: a battery cell is not needed for the turmeric test. (a) False (b) True
38. 38.True or false: bran from wheat flour is done by sieving. (a) True (b) False
39. 39.True or false: a magnet is not needed for making butter. (a) True (b) False
40. 40.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) white at once (b) green (c) reddish (d) bright blue

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