Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 104 · 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 sprouts in a few days? (a) seeds on dry cotton (b) seeds in the freezer (c) wet seeds by a window (d) boiled seeds
2. 2.🧺 Do we need a mirror for sprouting seeds? (a) needed (b) not needed
3. 3.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is kept the same. (a) True (b) False
4. 4.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we change it (b) we keep it the same (c) we measure it
5. 5.🫧 Which of these is neutral? (a) soap solution (b) vinegar (c) curd (d) salt water
6. 6.True or false: turmeric powder is needed for growing salt crystals. (a) True (b) False
7. 7.⚖️ Fair test — do seeds need water to sprout? Which of these is the one thing we change? (a) the kind of seeds (b) wet or dry cotton (c) the number of seeds (d) the same place
8. 8.🛟 Why should you never drink water just because it looks clear? (a) germs are invisible (b) clear water is salty (c) clear water is sweet (d) clear water is hot
9. 9.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the number of drops (b) the liquid we test (c) the colour we see
10. 10.🛟 Which rule keeps the turmeric test safe? (a) use only kitchen items (b) sniff each bottle hard (c) sip each liquid (d) mix bathroom cleaners
11. 11.📘 What is yeast? (a) a tiny living fungus (b) a kind of salt (c) a kind of sugar (d) a kind of stone
12. 12.True or false: hold up the leaves is a job of the stem. (a) True (b) False
13. 13.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the iron setting”? (a) we measure it (b) we keep it the same (c) we change it
14. 14.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: size of the balloon is the one thing we change. (a) False (b) True
15. 15.⚖️ 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) the amount of yeast (c) size of the balloon
16. 16.🧺 Do we need a battery cell for growing salt crystals? (a) needed (b) not needed
17. 17.🛟 What should you do if vinegar splashes in your eye? (a) ignore it (b) rinse with clean water (c) add baking soda (d) rub it hard
18. 18.🛟 Why is a plastic jar a good choice for shaking? (a) it will not break (b) it is hotter (c) it is magnetic (d) it is heavier
19. 19.🔮 Predict: you filter salty water through cloth. Does the salt stay on the cloth? (a) it turns to sand (b) it turns to sugar (c) yes, all of it (d) no, salt passes through
20. 20.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a shallow dish (c) a piece of string (d) turmeric powder
21. 21.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: the kind of plant is kept the same. (a) True (b) False
22. 22.🍞 Does yeast need salt to make gas? (a) yeast needs it (b) yeast does not need it
23. 23.🧺 Which of these is needed for the turmeric test? (a) a balloon (b) a magnet (c) turmeric powder (d) a comb
24. 24.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we keep it the same (b) we change it (c) we measure it
25. 25.🧈 Which of these is a change that cannot be undone? (a) browning lemon ink (b) freezing water (c) melting butter (d) dissolving salt
26. 26.🛟 Who should use the hot iron in the secret message experiment? (a) any child (b) whoever is fastest (c) the youngest child (d) only an adult
27. 27.⚖️ 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
28. 28.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “how hard we shake”? (a) we measure it (b) we keep it the same (c) we change it
29. 29.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a balloon (c) a spoon (d) a shallow dish
30. 30.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is kept the same? (a) the amount of vinegar (b) spoons of baking soda (c) size of the balloon
31. 31.🧺 Do we need lemon juice for the secret lemon message? (a) not needed (b) needed
32. 32.⚖️ 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) the same kind of bag (b) the kind of plant (c) sun or shade (d) amount of water drops
33. 33.🔮 The fizzing stops after a while. Why? (a) the gas froze (b) an ingredient ran out (c) the balloon got cold (d) the bottle got tired
34. 34.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) turmeric powder (b) a small bowl (c) a few days (d) moong seeds
35. 35.🫧 What do you see when baking soda meets vinegar? (a) nothing at all (b) it glows in the dark (c) lots of fizzy bubbles (d) it turns to ice
36. 36.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a small bowl (b) a cotton bud (c) white paper (d) a magnet
37. 37.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the ironing time”? (a) we keep it the same (b) we change it (c) we measure it
38. 38.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the amount of vinegar”? (a) we measure it (b) we keep it the same (c) we change it
39. 39.True or false: tea leaves from tea is done by filtering. (a) False (b) True
40. 40.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a potted plant (b) a mirror (c) a few hours (d) sunlight

Free science experiments lessons, practice and worksheets at talentjr.in/science-experiments-for-kids