Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 476 · 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.True or false: yeast is needed for growing salt crystals. (a) False (b) True
2. 2.⚖️ 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 change it (b) we measure it (c) we keep it the same
3. 3.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the liquid we test (b) the colour we see (c) the number of drops
4. 4.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is what we measure. (a) True (b) False
5. 5.🔮 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
6. 6.🧂 Does baking soda dissolve in water? (a) dissolves in water (b) does not dissolve
7. 7.🫧 Is soap solution an acid, a base or neutral? (a) a base (b) an acid (c) neutral
8. 8.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the filter material”? (a) we measure it (b) we keep it the same (c) we change it
9. 9.🧺 Do we need a mirror for the muddy water filter? (a) needed (b) not needed
10. 10.🔍 Which is the odd one out? (a) salt water (b) curd (c) orange juice (d) vinegar
11. 11.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) turmeric powder (c) a spoon (d) a magnet
12. 12.🌱 Is air needed for a seed to sprout? (a) not needed to sprout (b) needed to sprout
13. 13.🧺 Do we need a funnel for the muddy water filter? (a) not needed (b) needed
14. 14.True or false: orange juice is an acid. (a) True (b) False
15. 15.🛟 Which rule keeps the turmeric test safe? (a) use only kitchen items (b) sip each liquid (c) mix bathroom cleaners (d) sniff each bottle hard
16. 16.🧈 Can this change be undone: dissolving salt? (a) can be undone (b) cannot be undone
17. 17.True or false: sugar water is a base. (a) True (b) False
18. 18.True or false: warm water is not needed for the yeast balloon. (a) False (b) True
19. 19.🪴 Through which part does a plant take in water from the soil? (a) the flowers (b) the fruits (c) the roots (d) the leaves
20. 20.🧺 Which of these is not needed for the muddy water filter? (a) sand and pebbles (b) a funnel (c) a magnet (d) a clean glass
21. 21.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) safe from small children (c) in a busy doorway (d) next to the baby
22. 22.🍋 Why does the lemon writing turn brown with heat? (a) paper turns lemony (b) the iron is brown (c) heat adds colour (d) the juice scorches first
23. 23.🍋 Secret message: who does this step — writing the message? (a) a child can do it (b) an adult does it
24. 24.🍋 Secret message: who does this step — dipping the cotton bud? (a) a child can do it (b) an adult does it
25. 25.🧂 Does table salt dissolve in water? (a) dissolves in water (b) does not dissolve
26. 26.🛟 Who should use the hot iron in the secret message experiment? (a) whoever is fastest (b) any child (c) the youngest child (d) only an adult
27. 27.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is what we measure? (a) the same jar (b) how hard we shake (c) the cream temperature (d) time to make butter
28. 28.🟡 Turmeric paper meets sugar water. What happens? (a) turns reddish-brown (b) stays yellow
29. 29.📘 What do we call a solution that cannot dissolve any more salt? (a) saturated (b) empty (c) frozen (d) magnetic
30. 30.🟡 Which of these turns turmeric reddish-brown? (a) tamarind water (b) lemon juice (c) sugar water (d) baking soda water
31. 31.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) salt (c) a balloon (d) a piece of string
32. 32.🛟 Why is a plastic jar a good choice for shaking? (a) it is hotter (b) it is magnetic (c) it is heavier (d) it will not break
33. 33.True or false: plain water is an acid. (a) True (b) False
34. 34.🧺 Which of these is needed for the turmeric test? (a) a balloon (b) a battery cell (c) white paper strips (d) a magnet
35. 35.🔍 Which is the odd one out? (a) vinegar (b) tamarind water (c) sugar water (d) orange juice
36. 36.True or false: a spoon is not needed for growing salt crystals. (a) False (b) True
37. 37.🌱 Will these sprout: wet seeds in the dark? (a) does not sprout (b) sprouts
38. 38.🫧 Which of these is an acid? (a) soap solution (b) lemon juice (c) salt water (d) detergent water
39. 39.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: sun or shade is what we measure. (a) False (b) True
40. 40.🪴 Which part of a plant does this job: make food in sunlight? (a) roots (b) stem (c) flower (d) leaves

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