Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 615 · 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: a clear plastic bag is not needed for the leafy bag test. (a) False (b) True
2. 2.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “the time we wait”? (a) we change it (b) we measure it (c) we keep it the same
3. 3.🧈 Can this change be undone: melting butter? (a) can be undone (b) cannot be undone
4. 4.⚖️ 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
5. 5.🧺 Do we need a magnet for the secret lemon message? (a) needed (b) not needed
6. 6.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: the same bottle is what we measure. (a) True (b) False
7. 7.🔍 Which is the odd one out? (a) plain water (b) vinegar (c) salt water (d) sugar water
8. 8.⚖️ 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) sun or shade (b) amount of water drops (c) the kind of plant
9. 9.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the same paper”? (a) we keep it the same (b) we measure it (c) we change it
10. 10.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we keep it the same (b) we change it (c) we measure it
11. 11.🍋 Which of these steps is a job for an adult? (a) writing the message (b) reading the message (c) putting the iron away (d) dipping the cotton bud
12. 12.True or false: sunlight is not needed for a seed to sprout. (a) True (b) False
13. 13.🧺 Do we need a seed for the fizzy balloon? (a) needed (b) not needed
14. 14.🍋 Why does the lemon writing turn brown with heat? (a) paper turns lemony (b) heat adds colour (c) the juice scorches first (d) the iron is brown
15. 15.True or false: a balloon is not needed for growing salt crystals. (a) False (b) True
16. 16.🫗 Which of these is done by sieving? (a) chaff from wheat grain (b) mud from water (c) small stones from dal (d) bran from wheat flour
17. 17.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) milk turning to curd (c) melting butter (d) baking a cake
18. 18.🧈 Which of these is a change that can be undone? (a) dissolving salt (b) baking a cake (c) milk turning to curd (d) browning lemon ink
19. 19.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: how dark the writing is is what we measure. (a) True (b) False
20. 20.🧺 Do we need cotton or cloth for the muddy water filter? (a) needed (b) not needed
21. 21.🧺 Which of these is needed for the fizzy balloon? (a) a seed (b) a battery cell (c) a magnet (d) baking soda
22. 22.🧂 Which of these does not dissolve in water? (a) table salt (b) small pebbles (c) food colour (d) sugar
23. 23.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: the amount of vinegar is kept the same. (a) True (b) False
24. 24.🛟 Why should you never drink water just because it looks clear? (a) clear water is hot (b) clear water is sweet (c) clear water is salty (d) germs are invisible
25. 25.🧺 Do we need yeast for making butter? (a) needed (b) not needed
26. 26.🛟 Which safety rule fits the fizzy balloon experiment? (a) shake it near your face (b) seal it in a glass jar (c) keep it away from eyes (d) put it in your mouth
27. 27.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns black (b) it turns red (c) it turns blue (d) it stays yellow
28. 28.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) cold water to rinse (b) a jar with a tight lid (c) a bowl (d) a balloon
29. 29.🫧 Which of these is an acid? (a) vinegar (b) baking soda water (c) plain water (d) sugar water
30. 30.🌱 Is soil needed for a seed to sprout? (a) not needed to sprout (b) needed to sprout
31. 31.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is what we measure. (a) False (b) True
32. 32.🧺 Do we need yeast for the leafy bag test? (a) not needed (b) needed
33. 33.🍋 What colour does the lemon writing turn when an adult warms it? (a) brown (b) white (c) blue (d) green
34. 34.🍋 Secret message: who does this step — reading the message? (a) an adult does it (b) a child can do it
35. 35.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the same bottles”? (a) we change it (b) we keep it the same (c) we measure it
36. 36.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) an adult with an iron (b) lemon juice (c) white paper (d) a balloon
37. 37.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the same dish”? (a) we change it (b) we keep it the same (c) we measure it
38. 38.🧺 Which of these is needed for the leafy bag test? (a) turmeric powder (b) a rubber band (c) a magnet (d) a mirror
39. 39.True or false: bran from wheat flour is done by handpicking. (a) True (b) False
40. 40.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is kept the same. (a) True (b) False

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