Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 515 · 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.🧺 Do we need a paper clip for the yeast balloon? (a) needed (b) not needed
2. 2.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the amount poured”? (a) we measure it (b) we keep it the same (c) we change it
3. 3.🔍 What do you see inside the plastic bag after a few hours in the sun? (a) tiny insects (b) tiny water drops (c) nothing at all (d) salt crystals
4. 4.⚖️ 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
5. 5.🧺 Do we need an empty bottle for the fizzy balloon? (a) not needed (b) needed
6. 6.🧺 Do we need a balloon for making butter? (a) needed (b) not needed
7. 7.🔍 Which is the odd one out? (a) soap solution (b) detergent water (c) plain water (d) baking soda water
8. 8.🍋 What colour does the lemon writing turn when an adult warms it? (a) white (b) brown (c) green (d) blue
9. 9.📘 What do we call a solution that cannot dissolve any more salt? (a) frozen (b) magnetic (c) saturated (d) empty
10. 10.🍋 Secret message: who does this step — dipping the cotton bud? (a) an adult does it (b) a child can do it
11. 11.True or false: melting ice is a change that cannot be undone. (a) False (b) True
12. 12.True or false: an empty bottle is needed for the fizzy balloon. (a) False (b) True
13. 13.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
14. 14.🫧 What do you see when baking soda meets vinegar? (a) nothing at all (b) lots of fizzy bubbles (c) it turns to ice (d) it glows in the dark
15. 15.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a bowl (b) a balloon (c) a timer (d) a jar with a tight lid
16. 16.🧺 Which of these is not needed for sprouting seeds? (a) a few days (b) moong seeds (c) a magnet (d) cotton wool
17. 17.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “size of the balloon”? (a) we measure it (b) we keep it the same (c) we change it
18. 18.True or false: a balloon is needed for growing salt crystals. (a) True (b) False
19. 19.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a balloon (c) a small bottle (d) a battery cell
20. 20.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a mirror (b) a small bottle (c) sugar (d) dry yeast
21. 21.🔍 Which is the odd one out? (a) food colour (b) sand (c) table salt (d) baking soda
22. 22.🔮 Predict: a plant gets no water for many days in summer. What happens? (a) it flowers more (b) it grows faster (c) it turns blue (d) it wilts and droops
23. 23.🫧 Which of these is an acid? (a) soap solution (b) plain water (c) salt water (d) lemon juice
24. 24.🧺 Do we need soap solution for the turmeric test? (a) not needed (b) needed
25. 25.🟡 Which of these turns turmeric reddish-brown? (a) baking soda water (b) tamarind water (c) lemon juice (d) salt water
26. 26.🔍 Which is the odd one out? (a) melting ice (b) browning lemon ink (c) folding paper (d) dissolving salt
27. 27.🧺 Which of these is needed for sprouting seeds? (a) a mirror (b) turmeric powder (c) a magnet (d) cotton wool
28. 28.🧺 Do we need a small bowl for sprouting seeds? (a) needed (b) not needed
29. 29.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is the one thing we change. (a) False (b) True
30. 30.🍋 Which of these steps is a job for an adult? (a) writing the message (b) ironing the paper (c) letting the paper dry (d) reading the message
31. 31.🔮 Predict: you write with plain water instead of lemon juice. What appears after ironing? (a) a rainbow (b) dark brown words (c) blue words (d) almost nothing
32. 32.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) yeast (b) a rubber band (c) sunlight (d) a clear plastic bag
33. 33.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: the time we wait is kept the same. (a) False (b) True
34. 34.True or false: bad grains from rice is done by winnowing. (a) False (b) True
35. 35.True or false: a few hours is not needed for the leafy bag test. (a) False (b) True
36. 36.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the filter material is the one thing we change. (a) False (b) True
37. 37.🧈 Which tool is used in many Indian homes to churn curd into butter? (a) a rolling pin (b) a mathani (churner) (c) a pressure cooker (d) a sieve
38. 38.⚖️ Fair test — do seeds need water to sprout? What do we do with “the kind of seeds”? (a) we change it (b) we measure it (c) we keep it the same
39. 39.True or false: a mirror is not needed for the secret lemon message. (a) False (b) True
40. 40.🛟 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) feed them to pets (d) never put seeds in mouth

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