Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 225 · 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.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is kept the same? (a) time to make butter (b) the same jar (c) the cream temperature
2. 2.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) vinegar (b) a tray for spills (c) a balloon (d) a magnet
3. 3.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: the same bottle is kept the same. (a) False (b) True
4. 4.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) melting ice (c) rusting iron (d) milk turning to curd
5. 5.🍋 Which of these steps is a job for an adult? (a) putting the iron away (b) writing the message (c) letting the paper dry (d) reading the message
6. 6.🛟 Turmeric stains clothes. What should you wear? (a) your school uniform (b) an old shirt or apron (c) your best clothes (d) a white party dress
7. 7.🫗 How do we separate husk from rice grain? (a) filtering (b) handpicking (c) winnowing (d) sieving
8. 8.🔍 Which is the odd one out? (a) putting the iron away (b) plugging in the iron (c) dipping the cotton bud (d) cutting the lemon
9. 9.🛟 Which rule keeps the turmeric test safe? (a) sip each liquid (b) sniff each bottle hard (c) mix bathroom cleaners (d) use only kitchen items
10. 10.🫗 Which of these is done by winnowing? (a) husk from rice grain (b) bad grains from rice (c) salt from sea water (d) mud from water
11. 11.🔮 Predict: seeds on wet cotton are kept in a dark cupboard. Will they sprout? (a) no, never (b) they melt (c) yes, they sprout (d) they turn to stones
12. 12.🌊 How is salt made in salt pans by the sea? (a) salt rains down (b) sand is ground up (c) sea water evaporates (d) fish make it
13. 13.🌱 Which of these is not needed for a seed to sprout? (a) salt (b) water (c) air (d) warmth
14. 14.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows very little (b) it turns yellow (c) it bursts at once (d) it grows much faster
15. 15.🛟 Why must a plastic bag never go over anyone’s head? (a) it changes colour (b) it is too big (c) it gets wet (d) it can block breathing
16. 16.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? Which of these is kept the same? (a) sun or shade (b) the kind of plant (c) amount of water drops
17. 17.🔮 Predict: you filter salty water through cloth. Does the salt stay on the cloth? (a) no, salt passes through (b) it turns to sugar (c) yes, all of it (d) it turns to sand
18. 18.🫗 Which of these is done by filtering? (a) bad grains from rice (b) chaff from wheat grain (c) small stones from dal (d) mud from water
19. 19.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) in a busy doorway (c) safe from small children (d) next to the baby
20. 20.🍋 Which of these steps is a job a child can do? (a) cutting the lemon (b) ironing the paper (c) writing the message (d) plugging in the iron
21. 21.🍞 Where is yeast used in the kitchen? (a) to wash dishes (b) to clean floors (c) to colour rice (d) to make bread rise
22. 22.🫗 Which of these is done by evaporating? (a) bran from wheat flour (b) salt from sea water (c) bad grains from rice (d) chaff from wheat grain
23. 23.🧺 Which of these is needed for the secret lemon message? (a) a battery cell (b) a mirror (c) lemon juice (d) a balloon
24. 24.🫗 Which of these is done by handpicking? (a) husk from rice grain (b) sugar from sugar water (c) small stones from dal (d) salt from sea water
25. 25.📘 The browning of lemon juice with heat is a ___ change. (a) magnetic (b) musical (c) physical (d) chemical
26. 26.True or false: water is needed for a seed to sprout. (a) False (b) True
27. 27.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “how hard we shake”? (a) we change it (b) we keep it the same (c) we measure it
28. 28.🛟 What should you do after handling muddy water? (a) lick your fingers (b) nothing is needed (c) wipe hands on face (d) wash hands afterwards
29. 29.True or false: give out water vapour is a job of the roots. (a) True (b) False
30. 30.🧺 Which of these is not needed for the muddy water filter? (a) yeast (b) sand and pebbles (c) a clean glass (d) cotton or cloth
31. 31.🧈 Can this change be undone: baking a cake? (a) cannot be undone (b) can be undone
32. 32.⚖️ Fair test — do seeds need water to sprout? Which of these is the one thing we change? (a) wet or dry cotton (b) the number of seeds (c) the same bowls (d) how many seeds sprout
33. 33.⚖️ 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 change it (c) we keep it the same
34. 34.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: size of the balloon is the one thing we change. (a) True (b) False
35. 35.🧺 Do we need a battery cell for the secret lemon message? (a) needed (b) not needed
36. 36.🧺 Which of these is needed for the leafy bag test? (a) yeast (b) a battery cell (c) a few hours (d) a magnet
37. 37.True or false: a timer is needed for making butter. (a) True (b) False
38. 38.True or false: vinegar is an acid. (a) True (b) False
39. 39.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is the one thing we change? (a) the iron setting (b) the ironing time (c) how dark the writing is (d) the kind of juice
40. 40.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) browning lemon ink (c) melting butter (d) melting ice

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