Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 194 · 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.True or false: detergent water is a base. (a) True (b) False
2. 2.True or false: a small bowl is not needed for the secret lemon message. (a) True (b) False
3. 3.⚖️ Fair test — do seeds need water to sprout? True or false: wet or dry cotton is the one thing we change. (a) False (b) True
4. 4.🧺 Do we need turmeric powder for growing salt crystals? (a) needed (b) not needed
5. 5.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the same funnel is the one thing we change. (a) True (b) False
6. 6.🍞 Does yeast need warm water to make gas? (a) yeast does not need it (b) yeast needs it
7. 7.🛟 Turmeric stains clothes. What should you wear? (a) your best clothes (b) a white party dress (c) your school uniform (d) an old shirt or apron
8. 8.🍞 Does yeast need sunlight to make gas? (a) yeast does not need it (b) yeast needs it
9. 9.🧺 Do we need a mirror for the leafy bag test? (a) needed (b) not needed
10. 10.🪴 Which part of a plant does this job: make seeds? (a) roots (b) flower (c) stem (d) leaves
11. 11.🌱 Is soil needed for a seed to sprout? (a) needed to sprout (b) not needed to sprout
12. 12.⚖️ Fair test — do seeds need water to sprout? True or false: the number of seeds is the one thing we change. (a) False (b) True
13. 13.🔮 Predict: tea is poured through a strainer. What happens to the tea leaves? (a) both stay behind (b) leaves pass through (c) leaves stay behind (d) tea stays behind
14. 14.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a piece of string (c) a mirror (d) salt
15. 15.🔍 Which is the odd one out? (a) baking soda water (b) vinegar (c) tamarind water (d) salt water
16. 16.🧈 Which of these is a change that can be undone? (a) melting butter (b) cooking an egg (c) rusting iron (d) browning lemon ink
17. 17.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: the kind of balloon is kept the same. (a) False (b) True
18. 18.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) turmeric powder (b) a few days (c) a small bowl (d) moong seeds
19. 19.🟡 Turmeric paper meets baking soda water. What happens? (a) turns reddish-brown (b) stays yellow
20. 20.🍋 Why does the lemon writing turn brown with heat? (a) the iron is brown (b) paper turns lemony (c) heat adds colour (d) the juice scorches first
21. 21.🧺 Do we need a magnet for the muddy water filter? (a) not needed (b) needed
22. 22.🟡 Which of these keeps turmeric yellow? (a) baking soda water (b) detergent water (c) plain water (d) soap solution
23. 23.🔮 Predict: you use plain water instead of vinegar. What happens? (a) it turns to honey (b) very little fizzing (c) the balloon bursts (d) a huge eruption
24. 24.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: the same bottle is kept the same. (a) True (b) False
25. 25.True or false: a funnel or spoon is not needed for the fizzy balloon. (a) True (b) False
26. 26.🧺 Do we need a battery cell for the turmeric test? (a) not needed (b) needed
27. 27.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) a funnel (b) a battery cell (c) a clean glass (d) sand and pebbles
28. 28.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) the water temperature (b) the same bottles (c) size of the balloon (d) the amount of sugar
29. 29.🧺 Which of these is needed for the secret lemon message? (a) a magnet (b) a battery cell (c) yeast (d) white paper
30. 30.🧺 Do we need an empty bottle for the fizzy balloon? (a) not needed (b) needed
31. 31.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) sand and pebbles (b) muddy water (c) a mirror (d) a funnel
32. 32.🍞 Which of these is something yeast does not need? (a) sugar (b) salt (c) warm water (d) time
33. 33.True or false: soap solution turns turmeric reddish-brown. (a) False (b) True
34. 34.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) the amount of water (b) days to see crystals (c) the same dish (d) sunny or shady place
35. 35.🍋 Secret message: who does this step — cutting the lemon? (a) a child can do it (b) an adult does it
36. 36.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the same glass”? (a) we keep it the same (b) we measure it (c) we change it
37. 37.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) turmeric powder (b) a clear plastic bag (c) a few hours (d) a potted plant
38. 38.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a potted plant (b) yeast (c) a rubber band (d) a clear plastic bag
39. 39.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is kept the same. (a) True (b) False
40. 40.🪴 Which of these is a job of the leaves? (a) hold the plant in soil (b) carry water upward (c) make seeds (d) make food in sunlight

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