Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 914 · 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.📘 What do we call a seed starting to grow? (a) evaporation (b) germination (c) condensation (d) pollination
2. 2.True or false: soap solution is a base. (a) False (b) True
3. 3.🧺 Do we need a few hours for the leafy bag test? (a) not needed (b) needed
4. 4.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the filter material is the one thing we change. (a) True (b) False
5. 5.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) folding paper (c) browning lemon ink (d) rusting iron
6. 6.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? Which of these is what we measure? (a) amount of water drops (b) sun or shade (c) the kind of plant (d) the size of the plant
7. 7.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) days to see crystals (b) the amount of water (c) the kind of salt (d) the same dish
8. 8.True or false: carry water upward is a job of the stem. (a) True (b) False
9. 9.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “the same jar”? (a) we keep it the same (b) we measure it (c) we change it
10. 10.🔮 Predict: seeds on wet cotton are kept in the freezer. What happens? (a) they glow (b) they do not sprout (c) they sprout faster (d) they grow fruit
11. 11.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) dry yeast (c) turmeric powder (d) a small bottle
12. 12.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a balloon (b) a battery cell (c) vinegar (d) baking soda
13. 13.📘 The browning of lemon juice with heat is a ___ change. (a) magnetic (b) musical (c) chemical (d) physical
14. 14.⚖️ Fair test — do seeds need water to sprout? Which of these is the one thing we change? (a) the kind of seeds (b) the number of seeds (c) how many seeds sprout (d) wet or dry cotton
15. 15.🛟 Lemon juice stings cuts and eyes. What should you do after the experiment? (a) skip washing (b) wash your hands (c) lick your fingers (d) rub your eyes
16. 16.🧺 Do we need a small bowl for sprouting seeds? (a) needed (b) not needed
17. 17.True or false: yeast is not needed for the leafy bag test. (a) True (b) False
18. 18.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) a few days (b) a small bowl (c) a balloon (d) cotton wool
19. 19.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the number of drops (b) the liquid we test (c) the colour we see
20. 20.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is kept the same. (a) False (b) True
21. 21.🔍 Which is the odd one out? (a) sunlight (b) sugar (c) soil (d) air
22. 22.🟡 Which of these keeps turmeric yellow? (a) plain water (b) baking soda water (c) soap solution (d) detergent water
23. 23.🧺 Do we need a seed for the fizzy balloon? (a) not needed (b) needed
24. 24.🔍 Which is the odd one out? (a) food colour (b) sawdust (c) sugar (d) table salt
25. 25.🍞 Where is yeast used in the kitchen? (a) to wash dishes (b) to colour rice (c) to make bread rise (d) to clean floors
26. 26.⚖️ 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 keep it the same (b) we change it (c) we measure it
27. 27.🧺 Which of these is needed for making butter? (a) a battery cell (b) a timer (c) a balloon (d) a mirror
28. 28.⚖️ Fair test — do seeds need water to sprout? True or false: wet or dry cotton is kept the same. (a) True (b) False
29. 29.True or false: sunlight is not needed for a seed to sprout. (a) False (b) True
30. 30.🔮 Predict: which gives more drops in the bag — a hot sunny day or a cool cloudy day? (a) both the same (b) the cool cloudy day (c) neither of them (d) the hot sunny day
31. 31.🛟 The water for the yeast should be ___. (a) very salty (b) ice cold (c) warm, not hot (d) boiling hot
32. 32.🔍 Which is the odd one out? (a) soap solution (b) salt water (c) baking soda water (d) detergent water
33. 33.🧺 Do we need a timer for making butter? (a) needed (b) not needed
34. 34.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is kept the same? (a) how dark the writing is (b) the same paper (c) the kind of juice
35. 35.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) freezing water (c) baking a cake (d) rusting iron
36. 36.True or false: a battery cell is needed for the yeast balloon. (a) False (b) True
37. 37.🧂 Why do we stir in salt until no more will dissolve? (a) to make it fizz (b) to cool the water (c) to change its colour (d) to make it very salty
38. 38.🧺 Do we need water for sprouting seeds? (a) not needed (b) needed
39. 39.🟡 Which of these turns turmeric reddish-brown? (a) vinegar (b) tamarind water (c) baking soda water (d) sugar water
40. 40.True or false: sugar water is a base. (a) False (b) True

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