Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 433 · 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) time (b) warm water (c) sugar (d) sunlight
2. 2.True or false: cotton wool is not needed for sprouting seeds. (a) True (b) False
3. 3.True or false: wet seeds in the dark does not sprout. (a) True (b) False
4. 4.🪴 Which of these is a job of the leaves? (a) give out water vapour (b) make seeds (c) carry water upward (d) take in water from soil
5. 5.🧺 Which of these is needed for sprouting seeds? (a) a battery cell (b) moong seeds (c) yeast (d) a mirror
6. 6.🫧 Is lemon juice an acid, a base or neutral? (a) a base (b) neutral (c) an acid
7. 7.🛟 Why should you never drink water just because it looks clear? (a) clear water is salty (b) clear water is sweet (c) clear water is hot (d) germs are invisible
8. 8.True or false: milk turning to curd is a change that can be undone. (a) True (b) False
9. 9.True or false: a magnet is something yeast needs. (a) True (b) False
10. 10.🧺 Which of these is needed for the muddy water filter? (a) muddy water (b) yeast (c) turmeric powder (d) a battery cell
11. 11.🔮 Predict: which gives more drops in the bag — a hot sunny day or a cool cloudy day? (a) neither of them (b) both the same (c) the cool cloudy day (d) the hot sunny day
12. 12.True or false: sunlight is not needed for the leafy bag test. (a) True (b) False
13. 13.🫧 Which gas fills the balloon in the baking soda and vinegar experiment? (a) carbon dioxide (b) hydrogen (c) oxygen (d) helium
14. 14.🌱 Is salt needed for a seed to sprout? (a) needed to sprout (b) not needed to sprout
15. 15.🧈 Can this change be undone: baking a cake? (a) can be undone (b) cannot be undone
16. 16.🧺 Which of these is not needed for the turmeric test? (a) water (b) turmeric powder (c) soap solution (d) a mirror
17. 17.⚖️ Fair test — do seeds need water to sprout? Which of these is what we measure? (a) wet or dry cotton (b) the number of seeds (c) how many seeds sprout (d) the same bowls
18. 18.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: spoons of baking soda is what we measure. (a) False (b) True
19. 19.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is the one thing we change? (a) the amount of sugar (b) the water temperature (c) the amount of water (d) the amount of yeast
20. 20.📘 What do we call a solution that cannot dissolve any more salt? (a) frozen (b) empty (c) saturated (d) magnetic
21. 21.True or false: a battery cell is needed for making butter. (a) False (b) True
22. 22.True or false: milk turning to curd is a change that cannot be undone. (a) False (b) True
23. 23.True or false: cutting the lemon is a job a child can do. (a) True (b) False
24. 24.⚖️ 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) spoons of baking soda (c) size of the balloon (d) the same bottle
25. 25.True or false: wet seeds by a window sprouts in a few days. (a) True (b) False
26. 26.🌱 Which of these does not sprout? (a) seeds in the freezer (b) wet seeds by a window (c) wet seeds in the dark (d) seeds on wet cotton
27. 27.🛟 The water for the yeast should be ___. (a) boiling hot (b) ice cold (c) warm, not hot (d) very salty
28. 28.True or false: a battery cell is not needed for the fizzy balloon. (a) True (b) False
29. 29.🧂 Why do crystals appear as the dish dries? (a) water evaporates (b) the dish melts (c) salt grows roots (d) salt eats water
30. 30.True or false: warm water is something yeast needs. (a) False (b) True
31. 31.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the water temperature is kept the same. (a) False (b) True
32. 32.🔍 What do you see inside the plastic bag after a few hours in the sun? (a) tiny water drops (b) tiny insects (c) nothing at all (d) salt crystals
33. 33.True or false: detergent water is a base. (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) sunny or shady place (b) the amount of salt (c) the same dish (d) days to see crystals
35. 35.🔮 Predict: you tie a bag on a branch with no leaves. Will it collect much water? (a) exactly the same (b) much less water (c) much more water (d) it fills with soil
36. 36.True or false: carry water upward is a job of the leaves. (a) False (b) True
37. 37.True or false: vinegar is not needed for the fizzy balloon. (a) False (b) True
38. 38.True or false: freezing water is a change that can be undone. (a) True (b) False
39. 39.True or false: cold water to rinse is needed for making butter. (a) True (b) False
40. 40.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is what we measure. (a) True (b) False

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