Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 385 · 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.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) reddish (b) green (c) white at once (d) bright blue
2. 2.🍞 Why does yeast work slowly in cold water? (a) cold water is heavy (b) cold kills sugar (c) cold makes it pink (d) cold slows yeast down
3. 3.📘 Leaves have tiny holes that let out water vapour. What are they called? (a) veins (b) petals (c) stomata (d) roots
4. 4.True or false: a magnet is not needed for growing salt crystals. (a) False (b) True
5. 5.🍋 Which of these steps is a job for an adult? (a) ironing the paper (b) writing the message (c) letting the paper dry (d) reading the message
6. 6.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a comb (b) turmeric powder (c) a dropper or spoon (d) soap solution
7. 7.🌱 Seeds need water, air and ___ to sprout. (a) soil (b) salt (c) warmth (d) sugar
8. 8.🧈 Can this change be undone: dissolving salt? (a) cannot be undone (b) can be undone
9. 9.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the same funnel”? (a) we keep it the same (b) we measure it (c) we change it
10. 10.⚖️ 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) amount of water drops (b) sun or shade (c) the kind of plant (d) the same kind of bag
11. 11.🧺 Do we need lemon juice for the turmeric test? (a) not needed (b) needed
12. 12.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is the one thing we change? (a) the amount of salt (b) days to see crystals (c) the amount of water (d) sunny or shady place
13. 13.🎈 Why does the balloon blow up? (a) gas is made inside (b) the bottle shrinks (c) outside air gets in (d) vinegar is hot
14. 14.🔍 Which is the odd one out? (a) reading the message (b) putting the iron away (c) ironing the paper (d) cutting the lemon
15. 15.🧈 Before the butter appears, what does the cream turn into? (a) ice (b) thick whipped cream (c) clear water (d) powder
16. 16.⚖️ Fair test — do seeds need water to sprout? Which of these is the one thing we change? (a) the number of seeds (b) the same bowls (c) wet or dry cotton (d) the kind of seeds
17. 17.🛟 Which safety rule fits the fizzy balloon experiment? (a) seal it in a glass jar (b) put it in your mouth (c) keep it away from eyes (d) shake it near your face
18. 18.🛟 Some seeds from shops are coated with chemicals. What is the safe rule? (a) eat a few to check (b) throw them at friends (c) never put seeds in mouth (d) feed them to pets
19. 19.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows much faster (b) it turns yellow (c) it bursts at once (d) it grows very little
20. 20.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is what we measure. (a) False (b) True
21. 21.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) white paper (b) lemon juice (c) a small bowl (d) yeast
22. 22.🧺 Which of these is needed for the leafy bag test? (a) a magnet (b) vinegar (c) a mirror (d) sunlight
23. 23.🔮 Predict: which gives more drops in the bag — a hot sunny day or a cool cloudy day? (a) the hot sunny day (b) the cool cloudy day (c) neither of them (d) both the same
24. 24.🔍 Which is the odd one out? (a) vinegar (b) lemon juice (c) detergent water (d) curd
25. 25.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “the kind of plant”? (a) we change it (b) we measure it (c) we keep it the same
26. 26.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is kept the same? (a) spoons of baking soda (b) the amount of vinegar (c) size of the balloon
27. 27.🧺 Which of these is needed for the secret lemon message? (a) a balloon (b) yeast (c) white paper (d) a mirror
28. 28.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a comb (b) a small bottle (c) sugar (d) warm water
29. 29.🔍 Which is the odd one out? (a) sand (b) chalk powder (c) sugar (d) sawdust
30. 30.True or false: a mirror is not needed for the turmeric test. (a) False (b) True
31. 31.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a timer (b) fresh cream (c) cold water to rinse (d) a magnet
32. 32.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a balloon (b) white paper (c) a small bowl (d) an adult with an iron
33. 33.🧺 Do we need soap solution for the turmeric test? (a) needed (b) not needed
34. 34.🌱 Is salt needed for a seed to sprout? (a) not needed to sprout (b) needed to sprout
35. 35.🧈 Can this change be undone: cooking an egg? (a) cannot be undone (b) can be undone
36. 36.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? Which of these is kept the same? (a) amount of water drops (b) sun or shade (c) the size of the plant
37. 37.🫗 Why does filtered muddy water look clearer? (a) the filter traps mud (b) the mud dissolves (c) the water evaporates (d) the filter adds soap
38. 38.🧈 Which of these is a change that can be undone? (a) folding paper (b) cooking an egg (c) baking a cake (d) milk turning to curd
39. 39.🍞 Does yeast need salt to make gas? (a) yeast needs it (b) yeast does not need it
40. 40.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) turmeric powder (b) a small bowl (c) moong seeds (d) cotton wool

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