Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 961 · 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.🔍 Which is the odd one out? (a) dipping the cotton bud (b) writing the message (c) plugging in the iron (d) letting the paper dry
2. 2.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of sugar is kept the same. (a) False (b) True
3. 3.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) milk turning to curd (c) freezing water (d) baking a cake
4. 4.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is the one thing we change? (a) the amount of vinegar (b) the same bottle (c) the kind of balloon (d) spoons of baking soda
5. 5.🧺 Do we need a few hours for the leafy bag test? (a) needed (b) not needed
6. 6.🧂 Does small pebbles dissolve in water? (a) dissolves in water (b) does not dissolve
7. 7.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is kept the same? (a) size of the balloon (b) the kind of balloon (c) spoons of baking soda
8. 8.🍋 Why does the lemon writing turn brown with heat? (a) paper turns lemony (b) heat adds colour (c) the juice scorches first (d) the iron is brown
9. 9.🌱 Is water needed for a seed to sprout? (a) needed to sprout (b) not needed to sprout
10. 10.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the amount of vinegar”? (a) we measure it (b) we keep it the same (c) we change it
11. 11.🪴 Which of these is a job of the roots? (a) make seeds (b) hold the plant in soil (c) carry water upward (d) give out water vapour
12. 12.🧺 Do we need a battery cell for sprouting seeds? (a) needed (b) not needed
13. 13.📘 Leaves have tiny holes that let out water vapour. What are they called? (a) stomata (b) veins (c) roots (d) petals
14. 14.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) vinegar (b) a balloon (c) a mirror (d) an empty bottle
15. 15.True or false: tamarind water is a base. (a) True (b) False
16. 16.🍋 Secret message: who does this step — ironing the paper? (a) a child can do it (b) an adult does it
17. 17.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “spoons of baking soda”? (a) we measure it (b) we change it (c) we keep it the same
18. 18.🧺 Do we need yeast for the secret lemon message? (a) not needed (b) needed
19. 19.🧺 Do we need a cotton bud for the secret lemon message? (a) needed (b) not needed
20. 20.🔍 Which is the odd one out? (a) dipping the cotton bud (b) reading the message (c) putting the iron away (d) letting the paper dry
21. 21.🧺 Which of these is not needed for sprouting seeds? (a) moong seeds (b) a small bowl (c) a magnet (d) cotton wool
22. 22.🌱 Which of these is needed for a seed to sprout? (a) sunlight (b) sugar (c) water (d) salt
23. 23.🫗 How do we separate salt from sea water? (a) handpicking (b) filtering (c) sieving (d) evaporating
24. 24.🍞 Which of these is something yeast does not need? (a) warm water (b) sugar (c) time (d) a magnet
25. 25.⚖️ Fair test — do seeds need water to sprout? Which of these is the one thing we change? (a) the same bowls (b) the kind of seeds (c) how many seeds sprout (d) wet or dry cotton
26. 26.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns darker red (b) it turns yellow again (c) it disappears (d) it turns blue
27. 27.⚖️ Fair test — do seeds need water to sprout? What do we do with “the same bowls”? (a) we keep it the same (b) we measure it (c) we change it
28. 28.🛟 How should the plastic bag be tied around the branch? (a) gently, not too tight (b) with a hot glue gun (c) as tight as possible (d) with sharp wire
29. 29.🪴 Which part of a plant does this job: give out water vapour? (a) roots (b) flower (c) stem (d) leaves
30. 30.🧺 Do we need cotton or cloth for the muddy water filter? (a) needed (b) not needed
31. 31.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a magnet (c) a spoon (d) salt
32. 32.🧺 Do we need turmeric powder for the muddy water filter? (a) not needed (b) needed
33. 33.🧺 Do we need a clear plastic bag for the leafy bag test? (a) needed (b) not needed
34. 34.🛟 Why must a plastic bag never go over anyone’s head? (a) it gets wet (b) it is too big (c) it changes colour (d) it can block breathing
35. 35.🛟 What should you do after handling muddy water? (a) wipe hands on face (b) nothing is needed (c) wash hands afterwards (d) lick your fingers
36. 36.True or false: small stones from dal is done by handpicking. (a) False (b) True
37. 37.🧺 Which of these is not needed for making butter? (a) a timer (b) a jar with a tight lid (c) a balloon (d) fresh cream
38. 38.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) salt (c) a balloon (d) a shallow dish
39. 39.⚖️ 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 amount of water (c) the amount of sugar (d) size of the balloon
40. 40.True or false: warmth is needed for a seed to sprout. (a) False (b) True

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