Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 137 · 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: a comb is needed for the yeast balloon. (a) False (b) True
2. 2.🛟 Who should use the hot iron in the secret message experiment? (a) only an adult (b) the youngest child (c) any child (d) whoever is fastest
3. 3.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) cold water to rinse (b) a timer (c) a jar with a tight lid (d) a mirror
4. 4.🧂 Which of these dissolves in water? (a) sawdust (b) cooking oil (c) chalk powder (d) glucose powder
5. 5.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) baking soda water (c) vinegar (d) detergent water
6. 6.🧺 Do we need sunlight for the leafy bag test? (a) needed (b) not needed
7. 7.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is kept the same. (a) True (b) False
8. 8.⚖️ 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
9. 9.🪴 Which part of a plant does this job: take in water from soil? (a) leaves (b) flower (c) roots (d) stem
10. 10.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the colour we see (b) the light we look in (c) the liquid we test
11. 11.True or false: moong seeds is needed for sprouting seeds. (a) True (b) False
12. 12.🔍 Which is the odd one out? (a) letting the paper dry (b) writing the message (c) dipping the cotton bud (d) putting the iron away
13. 13.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? Which of these is the one thing we change? (a) the size of the plant (b) amount of water drops (c) the same kind of bag (d) sun or shade
14. 14.🌱 Which of these does not sprout? (a) seeds on wet cotton (b) wet seeds in the dark (c) wet seeds by a window (d) seeds on dry cotton
15. 15.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “the time we wait”? (a) we keep it the same (b) we change it (c) we measure it
16. 16.🫧 Is sugar water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
17. 17.True or false: tamarind water is an acid. (a) True (b) False
18. 18.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is kept the same? (a) size of the balloon (b) spoons of baking soda (c) the same bottle
19. 19.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) dissolving salt (c) baking a cake (d) rusting iron
20. 20.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) detergent water (c) baking soda water (d) tamarind water
21. 21.🔮 Predict: you tie a bag on a branch with no leaves. Will it collect much water? (a) much less water (b) exactly the same (c) much more water (d) it fills with soil
22. 22.🌱 Which of these sprouts in a few days? (a) seeds on dry cotton (b) seeds in the freezer (c) boiled seeds (d) seeds on wet cotton
23. 23.True or false: sunlight is not needed for the leafy bag test. (a) True (b) False
24. 24.🧺 Do we need water for sprouting seeds? (a) not needed (b) needed
25. 25.True or false: sugar is needed for the fizzy balloon. (a) False (b) True
26. 26.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a mirror (c) warm water (d) a piece of string
27. 27.🌱 Is warmth needed for a seed to sprout? (a) needed to sprout (b) not needed to sprout
28. 28.🔍 Which is the odd one out? (a) plugging in the iron (b) cutting the lemon (c) writing the message (d) putting the iron away
29. 29.🫧 Is baking soda water an acid, a base or neutral? (a) neutral (b) a base (c) an acid
30. 30.🧺 Do we need a seed for the fizzy balloon? (a) not needed (b) needed
31. 31.🔍 Which is the odd one out? (a) sugar (b) warm water (c) time (d) vinegar
32. 32.True or false: sugar from sugar water is done by evaporating. (a) False (b) True
33. 33.True or false: a clean glass is not needed for the muddy water filter. (a) True (b) False
34. 34.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a clear plastic bag (b) a mirror (c) a few hours (d) a rubber band
35. 35.🧂 Does baking soda dissolve in water? (a) dissolves in water (b) does not dissolve
36. 36.True or false: time is something yeast does not need. (a) False (b) True
37. 37.True or false: a magnet is needed for growing salt crystals. (a) False (b) True
38. 38.🛟 Who should pour the warm water for the crystal experiment? (a) a friend who is running (b) the youngest child (c) a grown-up (d) nobody needs to
39. 39.🛟 The water for the yeast should be ___. (a) very salty (b) warm, not hot (c) ice cold (d) boiling hot
40. 40.🧺 Do we need a mirror for sprouting seeds? (a) needed (b) not needed

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