Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 340 · 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 needed for the muddy water filter? (a) cotton or cloth (b) a mirror (c) a balloon (d) turmeric powder
2. 2.🎈 Why does the balloon blow up? (a) gas is made inside (b) the bottle shrinks (c) outside air gets in (d) vinegar is hot
3. 3.🫗 Which of these is done by evaporating? (a) gravel from fine sand (b) sugar from sugar water (c) mud from water (d) tea leaves from tea
4. 4.True or false: a mirror is needed for the leafy bag test. (a) True (b) False
5. 5.True or false: moong seeds is needed for sprouting seeds. (a) True (b) False
6. 6.⚖️ Fair test — do seeds need water to sprout? What do we do with “how many seeds sprout”? (a) we measure it (b) we keep it the same (c) we change it
7. 7.🌱 Which of these is not needed for a seed to sprout? (a) air (b) warmth (c) water (d) sunlight
8. 8.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the turmeric paper (b) the liquid we test (c) the colour we see (d) the number of drops
9. 9.🔍 Which is the odd one out? (a) detergent water (b) salt water (c) baking soda water (d) soap solution
10. 10.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the amount of sugar”? (a) we measure it (b) we change it (c) we keep it the same
11. 11.🧺 Which of these is not needed for the leafy bag test? (a) a clear plastic bag (b) sunlight (c) a mirror (d) a potted plant
12. 12.True or false: lemon juice is needed for the secret lemon message. (a) False (b) True
13. 13.True or false: melting butter is a change that cannot be undone. (a) True (b) False
14. 14.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) safe from small children (c) next to the baby (d) in a busy doorway
15. 15.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “how dark the writing is”? (a) we change it (b) we keep it the same (c) we measure it
16. 16.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the same paper”? (a) we measure it (b) we keep it the same (c) we change it
17. 17.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a jar with a tight lid (b) yeast (c) a timer (d) cold water to rinse
18. 18.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) lemon juice (b) a mirror (c) a cotton bud (d) white paper
19. 19.True or false: folding paper is a change that can be undone. (a) False (b) True
20. 20.True or false: a cotton bud is not needed for the secret lemon message. (a) True (b) False
21. 21.🛟 Lemon juice stings cuts and eyes. What should you do after the experiment? (a) rub your eyes (b) skip washing (c) lick your fingers (d) wash your hands
22. 22.🫗 Which of these is done by winnowing? (a) bran from wheat flour (b) chaff from wheat grain (c) tea leaves from tea (d) mud from water
23. 23.🛟 Why must children keep their fingers away from the iron? (a) it is sticky (b) it is magnetic (c) it can burn skin (d) it is cold
24. 24.True or false: turmeric powder is needed for the yeast balloon. (a) True (b) False
25. 25.🧺 Which of these is needed for the yeast balloon? (a) a comb (b) a magnet (c) a paper clip (d) warm water
26. 26.True or false: small stones from dal is done by filtering. (a) True (b) False
27. 27.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a mirror (b) lemon juice (c) a dropper or spoon (d) turmeric powder
28. 28.🍋 Secret message: who does this step — ironing the paper? (a) an adult does it (b) a child can do it
29. 29.🧺 Do we need a seed for the fizzy balloon? (a) not needed (b) needed
30. 30.🧈 Can this change be undone: rusting iron? (a) cannot be undone (b) can be undone
31. 31.True or false: a balloon is needed for the secret lemon message. (a) True (b) False
32. 32.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a spoon (c) a mirror (d) salt
33. 33.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “days to see crystals”? (a) we measure it (b) we change it (c) we keep it the same
34. 34.🧂 Does glucose powder dissolve in water? (a) does not dissolve (b) dissolves in water
35. 35.🛟 Who should pour the warm water for the crystal experiment? (a) a grown-up (b) nobody needs to (c) the youngest child (d) a friend who is running
36. 36.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) a small bottle (c) dry yeast (d) a battery cell
37. 37.🫧 Which of these is a base? (a) soap solution (b) salt water (c) sugar water (d) tamarind water
38. 38.True or false: turmeric powder is needed for the turmeric test. (a) True (b) False
39. 39.🔮 Predict: you use more vinegar and more baking soda. What happens to the balloon? (a) it grows bigger (b) there is no change (c) it turns blue (d) it shrinks
40. 40.🧺 Do we need a magnet for the leafy bag test? (a) needed (b) not needed

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