Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 871 · 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 battery cell (d) cold water to rinse
2. 2.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? Which of these is the one thing we change? (a) amount of water drops (b) the same kind of bag (c) the size of the plant (d) sun or shade
3. 3.🔮 Predict: you pour muddy water through two layers of cloth instead of one. The water comes out ___. (a) muddier (b) hot (c) salty (d) clearer
4. 4.⚖️ 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 change it (c) we keep it the same
5. 5.True or false: a battery cell is not needed for sprouting seeds. (a) False (b) True
6. 6.🔮 Predict: you tie a bag on a branch with no leaves. Will it collect much water? (a) much more water (b) exactly the same (c) much less water (d) it fills with soil
7. 7.🔍 Which is the odd one out? (a) soap solution (b) lemon juice (c) tamarind water (d) plain water
8. 8.🫧 Is curd an acid, a base or neutral? (a) an acid (b) a base (c) neutral
9. 9.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the ironing time”? (a) we keep it the same (b) we change it (c) we measure it
10. 10.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is the one thing we change. (a) False (b) True
11. 11.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the amount of vinegar”? (a) we change it (b) we keep it the same (c) we measure it
12. 12.True or false: melting butter is a change that can be undone. (a) False (b) True
13. 13.🫗 Which of these is done by handpicking? (a) sugar from sugar water (b) bran from wheat flour (c) salt from sea water (d) bad grains from rice
14. 14.🧺 Do we need a clean glass for the muddy water filter? (a) not needed (b) needed
15. 15.🛟 Which safety rule fits the fizzy balloon experiment? (a) shake it near your face (b) keep it away from eyes (c) seal it in a glass jar (d) put it in your mouth
16. 16.🔍 Which is the odd one out? (a) warmth (b) sunlight (c) sugar (d) soil
17. 17.🛟 Turmeric stains clothes. What should you wear? (a) your best clothes (b) a white party dress (c) an old shirt or apron (d) your school uniform
18. 18.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: spoons of baking soda is the one thing we change. (a) False (b) True
19. 19.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) fresh cream (b) a timer (c) turmeric powder (d) a bowl
20. 20.🧺 Do we need a mirror for the muddy water filter? (a) not needed (b) needed
21. 21.🫗 Why does filtered muddy water look clearer? (a) the mud dissolves (b) the filter adds soap (c) the filter traps mud (d) the water evaporates
22. 22.🧈 Can this change be undone: melting butter? (a) cannot be undone (b) can be undone
23. 23.🧺 Which of these is not needed for the leafy bag test? (a) a battery cell (b) a clear plastic bag (c) a rubber band (d) a few hours
24. 24.⚖️ Fair test — do seeds need water to sprout? True or false: how many seeds sprout is what we measure. (a) False (b) True
25. 25.🍞 Why do we add sugar to the yeast? (a) to make it sweet (b) it is food for yeast (c) to make it heavy (d) to colour it
26. 26.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) vinegar (b) a magnet (c) a tray for spills (d) baking soda
27. 27.🔍 What do you see inside the plastic bag after a few hours in the sun? (a) salt crystals (b) nothing at all (c) tiny water drops (d) tiny insects
28. 28.⚖️ 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 measure it (b) we change it (c) we keep it the same
29. 29.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is what we measure. (a) False (b) True
30. 30.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) green (b) reddish-brown (c) it stays white (d) bright blue
31. 31.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the liquid we test (b) the light we look in (c) the colour we see (d) the turmeric paper
32. 32.🧺 Do we need a comb for the yeast balloon? (a) needed (b) not needed
33. 33.🌱 Which of these is needed for a seed to sprout? (a) soil (b) water (c) sunlight (d) sugar
34. 34.🧂 Does cooking oil dissolve in water? (a) does not dissolve (b) dissolves in water
35. 35.🧺 Do we need a battery cell for making butter? (a) needed (b) not needed
36. 36.🫧 Is vinegar an acid, a base or neutral? (a) an acid (b) a base (c) neutral
37. 37.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) melting ice (c) browning lemon ink (d) baking a cake
38. 38.🧺 Which of these is needed for the yeast balloon? (a) turmeric powder (b) a small bottle (c) a mirror (d) a battery cell
39. 39.🍋 Which of these steps is a job for an adult? (a) letting the paper dry (b) ironing the paper (c) reading the message (d) writing the message
40. 40.🧺 Do we need vinegar for the fizzy balloon? (a) not needed (b) needed

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