Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 224 · 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.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a timer (b) a jar with a tight lid (c) a mirror (d) a bowl
2. 2.True or false: milk turning to curd is a change that cannot be undone. (a) False (b) True
3. 3.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) on the edge of a table (c) next to the baby (d) safe from small children
4. 4.🪴 Which part of a plant does this job: carry water upward? (a) leaves (b) stem (c) roots (d) flower
5. 5.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) yeast (c) water (d) turmeric powder
6. 6.🪴 Through which part does a plant take in water from the soil? (a) the fruits (b) the flowers (c) the roots (d) the leaves
7. 7.True or false: lemon juice is not needed for the turmeric test. (a) False (b) True
8. 8.True or false: take in water from soil is a job of the flower. (a) True (b) False
9. 9.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) sunlight (b) a few hours (c) yeast (d) a potted plant
10. 10.🛟 After the yeast experiment, what should you do with the mixture? (a) pour it down the sink (b) put it in your mouth (c) keep it for a month (d) throw it at a wall
11. 11.⚖️ Fair test — do seeds need water to sprout? True or false: wet or dry cotton is the one thing we change. (a) True (b) False
12. 12.🟡 Which of these turns turmeric reddish-brown? (a) vinegar (b) tamarind water (c) lemon juice (d) baking soda water
13. 13.🍞 Does yeast need sugar to make gas? (a) yeast does not need it (b) yeast needs it
14. 14.True or false: a mirror is needed for the fizzy balloon. (a) False (b) True
15. 15.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the number of drops (b) the liquid we test (c) the colour we see (d) the turmeric paper
16. 16.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the amount poured is kept the same. (a) False (b) True
17. 17.🧺 Which of these is needed for the yeast balloon? (a) a comb (b) sugar (c) turmeric powder (d) a paper clip
18. 18.🔍 Which is the odd one out? (a) reading the message (b) ironing the paper (c) putting the iron away (d) plugging in the iron
19. 19.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: how dark the writing is is the one thing we change. (a) True (b) False
20. 20.🎈 Why does the balloon blow up? (a) gas is made inside (b) the bottle shrinks (c) vinegar is hot (d) outside air gets in
21. 21.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: time to make butter is kept the same. (a) False (b) True
22. 22.🧺 Do we need fresh cream for making butter? (a) needed (b) not needed
23. 23.🔮 Predict: a plant gets no water for many days in summer. What happens? (a) it grows faster (b) it flowers more (c) it wilts and droops (d) it turns blue
24. 24.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “sunny or shady place”? (a) we keep it the same (b) we measure it (c) we change it
25. 25.🛟 Why must a plastic bag never go over anyone’s head? (a) it gets wet (b) it can block breathing (c) it changes colour (d) it is too big
26. 26.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the same funnel”? (a) we measure it (b) we change it (c) we keep it the same
27. 27.True or false: warm water is not needed for growing salt crystals. (a) False (b) True
28. 28.🧺 Do we need sugar for the fizzy balloon? (a) not needed (b) needed
29. 29.🫧 Which gas fills the balloon in the baking soda and vinegar experiment? (a) oxygen (b) hydrogen (c) carbon dioxide (d) helium
30. 30.🍞 Why do we add sugar to the yeast? (a) it is food for yeast (b) to make it heavy (c) to make it sweet (d) to colour it
31. 31.🛟 What should you do after handling muddy water? (a) lick your fingers (b) wash hands afterwards (c) nothing is needed (d) wipe hands on face
32. 32.🔍 Which is the odd one out? (a) melting butter (b) freezing water (c) folding paper (d) milk turning to curd
33. 33.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we change it (b) we keep it the same (c) we measure it
34. 34.📘 Is the fizzing a sign that a new substance is made? (a) it is only dissolving (b) no, nothing changes (c) yes, a new gas forms (d) it is only melting
35. 35.🧺 Which of these is needed for sprouting seeds? (a) turmeric powder (b) cotton wool (c) a battery cell (d) yeast
36. 36.🌱 Which of these is needed for a seed to sprout? (a) warmth (b) soil (c) sugar (d) salt
37. 37.🍞 Which of these is something yeast does not need? (a) sugar (b) time (c) vinegar (d) warm water
38. 38.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: how dark the writing is is kept the same. (a) True (b) False
39. 39.🫗 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
40. 40.🌱 Is salt needed for a seed to sprout? (a) needed to sprout (b) not needed to sprout

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