Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 983 · 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.🔮 Can the brown writing go back to being invisible? (a) yes, if cooled (b) yes, in the dark (c) yes, if shaken (d) no, it stays brown
2. 2.⚖️ Fair test — do seeds need water to sprout? True or false: the same place is kept the same. (a) False (b) True
3. 3.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: the same kind of bag is the one thing we change. (a) True (b) False
4. 4.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is what we measure? (a) the cream temperature (b) time to make butter (c) how hard we shake (d) the amount of cream
5. 5.🍞 Which of these is something yeast does not need? (a) sunlight (b) sugar (c) time (d) warm water
6. 6.🧂 Which of these does not dissolve in water? (a) baking soda (b) glucose powder (c) chalk powder (d) sugar
7. 7.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) liquid crystals (b) bigger crystals (c) smaller crystals (d) no crystals
8. 8.🍋 Which of these steps is a job for an adult? (a) dipping the cotton bud (b) letting the paper dry (c) reading the message (d) plugging in the iron
9. 9.⚖️ 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
10. 10.🪴 Which part of a plant does this job: make seeds? (a) flower (b) stem (c) leaves (d) roots
11. 11.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is what we measure? (a) size of the balloon (b) the kind of balloon (c) spoons of baking soda (d) the same bottle
12. 12.True or false: sunlight is something yeast needs. (a) True (b) False
13. 13.🫗 Which of these is done by filtering? (a) husk from rice grain (b) salt from sea water (c) bran from wheat flour (d) mud from water
14. 14.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is what we measure? (a) the same paper (b) the kind of juice (c) the iron setting (d) how dark the writing is
15. 15.True or false: yeast is needed for the turmeric test. (a) True (b) False
16. 16.⚖️ 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 measure it (b) we keep it the same (c) we change it
17. 17.🧺 Which of these is not needed for the leafy bag test? (a) a clear plastic bag (b) yeast (c) a few hours (d) sunlight
18. 18.True or false: lemon juice is not needed for the turmeric test. (a) True (b) False
19. 19.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the light we look in”? (a) we change it (b) we measure it (c) we keep it the same
20. 20.🌱 Is salt needed for a seed to sprout? (a) not needed to sprout (b) needed to sprout
21. 21.True or false: soap solution is a base. (a) False (b) True
22. 22.🧺 Which of these is not needed for the secret lemon message? (a) white paper (b) an adult with an iron (c) a small bowl (d) turmeric powder
23. 23.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a small bowl (b) yeast (c) lemon juice (d) white paper
24. 24.🧺 Which of these is not needed for making butter? (a) cold water to rinse (b) a timer (c) a jar with a tight lid (d) yeast
25. 25.True or false: a small bowl is not needed for sprouting seeds. (a) True (b) False
26. 26.🔍 Which is the odd one out? (a) vinegar (b) soap solution (c) detergent water (d) baking soda water
27. 27.🔮 Predict: sprouts grow in the dark for a week. What colour are their leaves? (a) pale yellow (b) blue (c) bright red (d) dark green
28. 28.🔍 Which is the odd one out? (a) warmth (b) water (c) air (d) sugar
29. 29.🧺 Which of these is not needed for the secret lemon message? (a) a balloon (b) lemon juice (c) an adult with an iron (d) white paper
30. 30.🧺 Do we need lemon juice for the secret lemon message? (a) not needed (b) needed
31. 31.True or false: muddy water is not needed for the muddy water filter. (a) True (b) False
32. 32.🪴 Which of these is a job of the flower? (a) hold the plant in soil (b) make seeds (c) make food in sunlight (d) carry water upward
33. 33.🧺 Do we need a seed for the fizzy balloon? (a) needed (b) not needed
34. 34.🛟 The water for the yeast should be ___. (a) boiling hot (b) warm, not hot (c) very salty (d) ice cold
35. 35.🟡 Turmeric paper meets salt water. What happens? (a) turns reddish-brown (b) stays yellow
36. 36.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the amount of sugar”? (a) we measure it (b) we change it (c) we keep it the same
37. 37.📘 What do we call plants giving out water vapour from their leaves? (a) transpiration (b) reflection (c) germination (d) digestion
38. 38.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) the amount of salt (b) sunny or shady place (c) days to see crystals
39. 39.🍞 Where is yeast used in the kitchen? (a) to colour rice (b) to clean floors (c) to wash dishes (d) to make bread rise
40. 40.⚖️ Fair test — do seeds need water to sprout? True or false: wet or dry cotton is what we measure. (a) False (b) True

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