Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 929 · 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.🌱 Will these sprout: wet seeds in the dark? (a) sprouts (b) does not sprout
2. 2.True or false: soap solution keeps turmeric yellow. (a) False (b) True
3. 3.🍋 What colour does the lemon writing turn when an adult warms it? (a) green (b) white (c) brown (d) blue
4. 4.🍋 Secret message: who does this step — letting the paper dry? (a) an adult does it (b) a child can do it
5. 5.True or false: turmeric powder is needed for sprouting seeds. (a) False (b) True
6. 6.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the same bottles is kept the same. (a) False (b) True
7. 7.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “sun or shade”? (a) we keep it the same (b) we measure it (c) we change it
8. 8.🫧 Is orange juice an acid, a base or neutral? (a) a base (b) an acid (c) neutral
9. 9.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the kind of juice is what we measure. (a) False (b) True
10. 10.True or false: a magnet is not needed for sprouting seeds. (a) True (b) False
11. 11.True or false: tamarind water keeps turmeric yellow. (a) True (b) False
12. 12.True or false: chaff from wheat grain is done by filtering. (a) True (b) False
13. 13.🍞 Why does yeast work slowly in cold water? (a) cold kills sugar (b) cold slows yeast down (c) cold water is heavy (d) cold makes it pink
14. 14.🛟 What should you do after handling muddy water? (a) wipe hands on face (b) lick your fingers (c) wash hands afterwards (d) nothing is needed
15. 15.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is kept the same? (a) the cream temperature (b) the amount of cream (c) time to make butter
16. 16.🍞 Where is yeast used in the kitchen? (a) to colour rice (b) to clean floors (c) to wash dishes (d) to make bread rise
17. 17.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) yeast (c) warm water (d) a spoon
18. 18.🧈 Can this change be undone: browning lemon ink? (a) can be undone (b) cannot be undone
19. 19.🍞 Does yeast need warm water to make gas? (a) yeast does not need it (b) yeast needs it
20. 20.🛟 Turmeric stains clothes. What should you wear? (a) an old shirt or apron (b) a white party dress (c) your school uniform (d) your best clothes
21. 21.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it stays yellow (b) it turns red (c) it turns black (d) it turns blue
22. 22.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is kept the same? (a) the filter material (b) how clear the water is (c) the same glass
23. 23.🛟 Why must a plastic bag never go over anyone’s head? (a) it gets wet (b) it is too big (c) it can block breathing (d) it changes colour
24. 24.🍞 Which of these is something yeast needs? (a) a magnet (b) sunlight (c) sugar (d) salt
25. 25.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the colour we see (b) the number of drops (c) the liquid we test (d) the turmeric paper
26. 26.🍋 Secret message: who does this step — dipping the cotton bud? (a) an adult does it (b) a child can do it
27. 27.⚖️ Fair test — do seeds need water to sprout? What do we do with “how many seeds sprout”? (a) we keep it the same (b) we change it (c) we measure it
28. 28.True or false: boiled seeds sprouts in a few days. (a) True (b) False
29. 29.🪴 Which part of a plant does this job: make seeds? (a) roots (b) leaves (c) stem (d) flower
30. 30.🔍 Which is the odd one out? (a) letting the paper dry (b) dipping the cotton bud (c) reading the message (d) plugging in the iron
31. 31.🧺 Do we need sugar for the fizzy balloon? (a) needed (b) not needed
32. 32.🛟 The water for the yeast should be ___. (a) warm, not hot (b) ice cold (c) boiling hot (d) very salty
33. 33.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the same paper”? (a) we change it (b) we keep it the same (c) we measure it
34. 34.True or false: air is needed for a seed to sprout. (a) False (b) True
35. 35.🔮 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
36. 36.🧈 Can this change be undone: rusting iron? (a) can be undone (b) cannot be undone
37. 37.🔍 What do you see after shaking cream in a jar for a long time? (a) lumps of butter (b) bubbles of gas (c) sugar crystals (d) clear water only
38. 38.True or false: salt is something yeast needs. (a) True (b) False
39. 39.🌱 Which of these is needed for a seed to sprout? (a) sugar (b) water (c) soil (d) sunlight
40. 40.🫧 Is vinegar an acid, a base or neutral? (a) neutral (b) an acid (c) a base

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