Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 774 · 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.🍞 Does yeast need vinegar to make gas? (a) yeast needs it (b) yeast does not need it
2. 2.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) the balloon is bigger (b) it shrinks to nothing (c) it turns to bread (d) the balloon is smaller
3. 3.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the kind of salt”? (a) we change it (b) we keep it the same (c) we measure it
4. 4.🔮 Predict: you use plain water instead of vinegar. What happens? (a) the balloon bursts (b) a huge eruption (c) it turns to honey (d) very little fizzing
5. 5.🫧 Is baking soda water an acid, a base or neutral? (a) a base (b) neutral (c) an acid
6. 6.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is the one thing we change? (a) time to make butter (b) the same jar (c) the cream temperature (d) how hard we shake
7. 7.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “spoons of baking soda”? (a) we measure it (b) we change it (c) we keep it the same
8. 8.🔍 Which is the odd one out? (a) vinegar (b) lemon juice (c) tamarind water (d) detergent water
9. 9.🧺 Do we need a few days for sprouting seeds? (a) needed (b) not needed
10. 10.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is kept the same? (a) spoons of baking soda (b) size of the balloon (c) the amount of vinegar
11. 11.True or false: a battery cell is not needed for sprouting seeds. (a) False (b) True
12. 12.🟡 Which of these turns turmeric reddish-brown? (a) sugar water (b) salt water (c) baking soda water (d) vinegar
13. 13.True or false: folding paper is a change that cannot be undone. (a) False (b) True
14. 14.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we keep it the same (b) we measure it (c) we change it
15. 15.🔮 Predict: a plant gets no water for many days in summer. What happens? (a) it flowers more (b) it wilts and droops (c) it grows faster (d) it turns blue
16. 16.🧺 Do we need turmeric powder for making butter? (a) not needed (b) needed
17. 17.🧺 Do we need a mirror for the leafy bag test? (a) needed (b) not needed
18. 18.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) an adult with an iron (b) white paper (c) turmeric powder (d) a cotton bud
19. 19.🌱 Is sugar needed for a seed to sprout? (a) needed to sprout (b) not needed to sprout
20. 20.True or false: a spoon is not needed for growing salt crystals. (a) False (b) True
21. 21.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) green (b) bright blue (c) white at once (d) reddish
22. 22.True or false: vinegar is something yeast does not need. (a) False (b) True
23. 23.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “how dark the writing is”? (a) we change it (b) we keep it the same (c) we measure it
24. 24.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is kept the same? (a) the cream temperature (b) time to make butter (c) how hard we shake
25. 25.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “the amount of cream”? (a) we measure it (b) we keep it the same (c) we change it
26. 26.🟡 Which of these keeps turmeric yellow? (a) plain water (b) detergent water (c) baking soda water (d) soap solution
27. 27.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) sugar (c) a mirror (d) warm water
28. 28.🪴 Where did the water inside the bag come from? (a) the plastic (b) the rubber band (c) the leaves (d) the rain
29. 29.🍞 Which of these is something yeast needs? (a) vinegar (b) sugar (c) a magnet (d) salt
30. 30.🧺 Which of these is needed for the fizzy balloon? (a) a seed (b) a mirror (c) a comb (d) a tray for spills
31. 31.🔍 What do you see inside the plastic bag after a few hours in the sun? (a) nothing at all (b) tiny insects (c) tiny water drops (d) salt crystals
32. 32.🍋 Secret message: who does this step — cutting the lemon? (a) a child can do it (b) an adult does it
33. 33.True or false: orange juice is neutral. (a) False (b) True
34. 34.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is the one thing we change? (a) the same funnel (b) the filter material (c) the amount poured (d) the same glass
35. 35.🧺 Do we need muddy water for the muddy water filter? (a) not needed (b) needed
36. 36.True or false: mud from water is done by filtering. (a) False (b) True
37. 37.🧺 Which of these is not needed for making butter? (a) a battery cell (b) a bowl (c) cold water to rinse (d) a timer
38. 38.⚖️ Fair test — do seeds need water to sprout? Which of these is kept the same? (a) the kind of seeds (b) how many seeds sprout (c) wet or dry cotton
39. 39.🧺 Do we need warm water for growing salt crystals? (a) not needed (b) needed
40. 40.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a battery cell (b) a jar with a tight lid (c) a bowl (d) fresh cream

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