Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 909 · 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: take in water from soil is a job of the roots. (a) True (b) False
2. 2.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of water is kept the same. (a) False (b) True
3. 3.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the same paper”? (a) we change it (b) we measure it (c) we keep it the same
4. 4.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) an empty bottle (b) vinegar (c) sugar (d) a balloon
5. 5.🟡 Turmeric paper meets lemon juice. What happens? (a) stays yellow (b) turns reddish-brown
6. 6.🧺 Do we need turmeric powder for the turmeric test? (a) not needed (b) needed
7. 7.🫗 Which of these is done by evaporating? (a) sugar from sugar water (b) husk from rice grain (c) bran from wheat flour (d) bad grains from rice
8. 8.🛟 The water for the yeast should be ___. (a) very salty (b) boiling hot (c) ice cold (d) warm, not hot
9. 9.🧺 Do we need a small bowl for the secret lemon message? (a) not needed (b) needed
10. 10.🌱 Which of these sprouts in a few days? (a) seeds on wet cotton (b) boiled seeds (c) seeds on dry cotton (d) seeds in the freezer
11. 11.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns blue (b) it turns green (c) reddish-brown (d) it stays yellow
12. 12.🔍 Which is the odd one out? (a) air (b) warmth (c) soil (d) water
13. 13.🔍 Which is the odd one out? (a) salt (b) air (c) warmth (d) water
14. 14.🧺 Which of these is needed for the fizzy balloon? (a) a battery cell (b) a magnet (c) a mirror (d) baking soda
15. 15.⚖️ 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 measure it (c) we change it
16. 16.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: the size of the plant is the one thing we change. (a) True (b) False
17. 17.True or false: freezing water is a change that can be undone. (a) False (b) True
18. 18.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “time to make butter”? (a) we keep it the same (b) we measure it (c) we change it
19. 19.True or false: make seeds is a job of the flower. (a) True (b) False
20. 20.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the same bottles is the one thing we change. (a) False (b) True
21. 21.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the number of drops (b) the turmeric paper (c) the colour we see (d) the liquid we test
22. 22.🫧 Which of these is an acid? (a) soap solution (b) sugar water (c) tamarind water (d) detergent water
23. 23.🧈 What is the watery liquid left after the butter forms? (a) vinegar (b) oil (c) buttermilk (d) honey
24. 24.True or false: salt is something yeast needs. (a) True (b) False
25. 25.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a jar with a tight lid (b) a magnet (c) a bowl (d) fresh cream
26. 26.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the kind of juice is the one thing we change. (a) True (b) False
27. 27.🧂 Does small pebbles dissolve in water? (a) does not dissolve (b) dissolves in water
28. 28.🍞 Why does yeast work slowly in cold water? (a) cold kills sugar (b) cold makes it pink (c) cold slows yeast down (d) cold water is heavy
29. 29.True or false: cooking an egg is a change that can be undone. (a) False (b) True
30. 30.🫗 Muddy water is poured through a cloth filter. What stays on the cloth? (a) the salt (b) the water (c) nothing (d) the mud
31. 31.🍞 Does yeast need warm water to make gas? (a) yeast does not need it (b) yeast needs it
32. 32.🔍 Which is the odd one out? (a) putting the iron away (b) plugging in the iron (c) reading the message (d) ironing the paper
33. 33.🍋 Secret message: who does this step — ironing the paper? (a) a child can do it (b) an adult does it
34. 34.🍞 Which of these is something yeast does not need? (a) warm water (b) time (c) sunlight (d) sugar
35. 35.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “spoons of baking soda”? (a) we keep it the same (b) we measure it (c) we change it
36. 36.🫧 Is curd an acid, a base or neutral? (a) an acid (b) neutral (c) a base
37. 37.🪴 Which part of a plant does this job: make seeds? (a) stem (b) roots (c) leaves (d) flower
38. 38.🧈 Can this change be undone: melting ice? (a) can be undone (b) cannot be undone
39. 39.True or false: a magnet is not needed for the turmeric test. (a) True (b) False
40. 40.True or false: a small bottle is not needed for the yeast balloon. (a) True (b) False

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