Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 337 · 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 secret lemon message? (a) a balloon (b) yeast (c) a small bowl (d) a mirror
2. 2.🧺 Which of these is needed for the yeast balloon? (a) turmeric powder (b) a magnet (c) dry yeast (d) a mirror
3. 3.🧺 Which of these is not needed for making butter? (a) cold water to rinse (b) a timer (c) a mirror (d) a jar with a tight lid
4. 4.True or false: a mirror is needed for the secret lemon message. (a) False (b) True
5. 5.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the same cotton bud is the one thing we change. (a) True (b) False
6. 6.True or false: turmeric powder is needed for the leafy bag test. (a) True (b) False
7. 7.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it bursts at once (b) it turns yellow (c) it grows much faster (d) it grows very little
8. 8.🛟 Why must the jar lid be screwed on tightly? (a) so it gets hot (b) so air gets out (c) so cream does not spill (d) so it turns yellow
9. 9.🧺 Do we need a clear plastic bag for the leafy bag test? (a) not needed (b) needed
10. 10.🫗 Which of these is done by evaporating? (a) bad grains from rice (b) husk from rice grain (c) sugar from sugar water (d) mud from water
11. 11.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the same glass is kept the same. (a) False (b) True
12. 12.🧂 Does glucose powder dissolve in water? (a) does not dissolve (b) dissolves in water
13. 13.⚖️ Fair test — do seeds need water to sprout? What do we do with “the kind of seeds”? (a) we keep it the same (b) we change it (c) we measure it
14. 14.🫗 Which of these is done by winnowing? (a) bran from wheat flour (b) small stones from dal (c) husk from rice grain (d) bad grains from rice
15. 15.True or false: orange juice is an acid. (a) True (b) False
16. 16.True or false: an adult with an iron is needed for the secret lemon message. (a) False (b) True
17. 17.🔮 Predict: a plant gets no water for many days in summer. What happens? (a) it flowers more (b) it turns blue (c) it wilts and droops (d) it grows faster
18. 18.🌱 Is air needed for a seed to sprout? (a) not needed to sprout (b) needed to sprout
19. 19.⚖️ 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) False (b) True
20. 20.True or false: seeds on wet cotton does not sprout. (a) True (b) False
21. 21.🔍 Which is the odd one out? (a) sawdust (b) cooking oil (c) sand (d) food colour
22. 22.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) sand and pebbles (b) a funnel (c) cotton or cloth (d) a magnet
23. 23.🔮 Predict: you write with plain water instead of lemon juice. What appears after ironing? (a) almost nothing (b) blue words (c) dark brown words (d) a rainbow
24. 24.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the colour we see (b) the light we look in (c) the liquid we test (d) the number of drops
25. 25.True or false: table salt does not dissolve in water. (a) False (b) True
26. 26.🧺 Do we need a bowl for making butter? (a) needed (b) not needed
27. 27.True or false: plain water keeps turmeric yellow. (a) True (b) False
28. 28.🧺 Do we need a balloon for the fizzy balloon? (a) not needed (b) needed
29. 29.🔮 Predict: which gives more drops in the bag — a hot sunny day or a cool cloudy day? (a) both the same (b) neither of them (c) the cool cloudy day (d) the hot sunny day
30. 30.🛟 Why is a plastic jar a good choice for shaking? (a) it will not break (b) it is heavier (c) it is hotter (d) it is magnetic
31. 31.🧂 Why do crystals appear as the dish dries? (a) salt grows roots (b) the dish melts (c) water evaporates (d) salt eats water
32. 32.🧺 Do we need turmeric powder for sprouting seeds? (a) not needed (b) needed
33. 33.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is the one thing we change? (a) the filter material (b) how clear the water is (c) the same muddy water (d) the same glass
34. 34.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it turns blue (b) it stays yellow (c) it turns black (d) it turns red
35. 35.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the same cotton bud is kept the same. (a) True (b) False
36. 36.🔍 Which is the odd one out? (a) writing the message (b) dipping the cotton bud (c) ironing the paper (d) reading the message
37. 37.⚖️ Fair test — do seeds need water to sprout? Which of these is kept the same? (a) wet or dry cotton (b) how many seeds sprout (c) the same bowls
38. 38.True or false: curd is neutral. (a) True (b) False
39. 39.⚖️ 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 same dish (b) the amount of salt (c) the kind of salt (d) days to see crystals
40. 40.⚖️ 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

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