Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 205 · 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 is the odd one out? (a) dipping the cotton bud (b) putting the iron away (c) reading the message (d) letting the paper dry
2. 2.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we measure it (b) we keep it the same (c) we change it
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 what we measure. (a) True (b) False
4. 4.🫗 Which of these is done by evaporating? (a) salt from sea water (b) tea leaves from tea (c) bad grains from rice (d) chaff from wheat grain
5. 5.🛟 Turmeric stains clothes. What should you wear? (a) an old shirt or apron (b) your best clothes (c) your school uniform (d) a white party dress
6. 6.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is what we measure? (a) the same bottle (b) the kind of balloon (c) the amount of vinegar (d) size of the balloon
7. 7.🪴 Which of these is a job of the flower? (a) make seeds (b) give out water vapour (c) carry water upward (d) make food in sunlight
8. 8.🍋 Which of these steps is a job for an adult? (a) dipping the cotton bud (b) plugging in the iron (c) reading the message (d) letting the paper dry
9. 9.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: spoons of baking soda is kept the same. (a) False (b) True
10. 10.🔮 Predict: you tie a bag on a branch with no leaves. Will it collect much water? (a) it fills with soil (b) much more water (c) exactly the same (d) much less water
11. 11.🛟 How should the plastic bag be tied around the branch? (a) as tight as possible (b) with sharp wire (c) gently, not too tight (d) with a hot glue gun
12. 12.🧈 Can this change be undone: melting ice? (a) can be undone (b) cannot be undone
13. 13.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) bright blue (b) reddish (c) green (d) white at once
14. 14.⚖️ 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 keep it the same (b) we change it (c) we measure it
15. 15.🌱 What comes out of a moong seed first when it sprouts? (a) a flower (b) a thorn (c) a tiny root (d) a fruit
16. 16.True or false: turmeric powder is needed for sprouting seeds. (a) False (b) True
17. 17.🫗 Why does filtered muddy water look clearer? (a) the filter adds soap (b) the water evaporates (c) the mud dissolves (d) the filter traps mud
18. 18.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) folding paper (c) rusting iron (d) cooking an egg
19. 19.📘 What do we call plants giving out water vapour from their leaves? (a) germination (b) transpiration (c) reflection (d) digestion
20. 20.True or false: a battery cell is not needed for the leafy bag test. (a) False (b) True
21. 21.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the same bottles is kept the same. (a) True (b) False
22. 22.🍞 Why does yeast work slowly in cold water? (a) cold slows yeast down (b) cold kills sugar (c) cold makes it pink (d) cold water is heavy
23. 23.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: the kind of balloon is the one thing we change. (a) True (b) False
24. 24.🛟 After the yeast experiment, what should you do with the mixture? (a) keep it for a month (b) put it in your mouth (c) throw it at a wall (d) pour it down the sink
25. 25.⚖️ 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 kind of salt (b) days to see crystals (c) the same dish (d) the amount of water
26. 26.🍞 Which of these is something yeast does not need? (a) time (b) sugar (c) sunlight (d) warm water
27. 27.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the filter material”? (a) we measure it (b) we keep it the same (c) we change it
28. 28.🍋 Secret message: who does this step — ironing the paper? (a) a child can do it (b) an adult does it
29. 29.🧺 Do we need a mirror for sprouting seeds? (a) needed (b) not needed
30. 30.True or false: a battery cell is needed for the muddy water filter. (a) False (b) True
31. 31.🔮 Predict: you filter salty water through cloth. Does the salt stay on the cloth? (a) yes, all of it (b) it turns to sand (c) no, salt passes through (d) it turns to sugar
32. 32.🫧 Which of these is neutral? (a) lemon juice (b) tamarind water (c) plain water (d) soap solution
33. 33.🫧 Is vinegar an acid, a base or neutral? (a) a base (b) neutral (c) an acid
34. 34.🛟 What should you do after handling muddy water? (a) nothing is needed (b) lick your fingers (c) wipe hands on face (d) wash hands afterwards
35. 35.True or false: carry water upward is a job of the stem. (a) False (b) True
36. 36.🧈 Can this change be undone: folding paper? (a) cannot be undone (b) can be undone
37. 37.🌱 Which of these does not sprout? (a) wet seeds by a window (b) seeds on wet cotton (c) wet seeds in the dark (d) seeds on dry cotton
38. 38.🧺 Which of these is needed for the yeast balloon? (a) a paper clip (b) dry yeast (c) turmeric powder (d) a magnet
39. 39.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a seed (b) a tray for spills (c) baking soda (d) a funnel or spoon
40. 40.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the liquid we test (b) the number of drops (c) the light we look in (d) the turmeric paper

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