Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 237 · 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: seeds on dry cotton sprouts in a few days. (a) True (b) False
2. 2.🔮 Predict: you use more vinegar and more baking soda. What happens to the balloon? (a) it turns blue (b) there is no change (c) it shrinks (d) it grows bigger
3. 3.🫧 Which of these is an acid? (a) lemon juice (b) baking soda water (c) detergent water (d) sugar water
4. 4.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “the kind of plant”? (a) we keep it the same (b) we change it (c) we measure it
5. 5.🧺 Which of these is needed for growing salt crystals? (a) a piece of string (b) yeast (c) turmeric powder (d) a mirror
6. 6.🧈 Which of these is a change that can be undone? (a) rusting iron (b) cooking an egg (c) baking a cake (d) melting ice
7. 7.True or false: sugar does not dissolve in water. (a) True (b) False
8. 8.🌱 Which of these does not sprout? (a) seeds on wet cotton (b) wet seeds in the dark (c) wet seeds by a window (d) boiled seeds
9. 9.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a clear plastic bag (b) a rubber band (c) sunlight (d) a magnet
10. 10.⚖️ 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 change it (b) we measure it (c) we keep it the same
11. 11.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is the one thing we change? (a) size of the balloon (b) the same bottle (c) the amount of vinegar (d) spoons of baking soda
12. 12.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is kept the same? (a) the ironing time (b) how dark the writing is (c) the kind of juice
13. 13.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the liquid we test (b) the number of drops (c) the colour we see (d) the turmeric paper
14. 14.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the same cotton bud is the one thing we change. (a) True (b) False
15. 15.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) the balloon is bigger (b) the balloon is smaller (c) it shrinks to nothing (d) it turns to bread
16. 16.🛟 Turmeric stains clothes. What should you wear? (a) your school uniform (b) an old shirt or apron (c) your best clothes (d) a white party dress
17. 17.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is the one thing we change? (a) time to make butter (b) the cream temperature (c) how hard we shake (d) the same jar
18. 18.🧂 Which of these does not dissolve in water? (a) table salt (b) food colour (c) small pebbles (d) baking soda
19. 19.🧈 Can this change be undone: melting ice? (a) can be undone (b) cannot be undone
20. 20.🫧 Is curd an acid, a base or neutral? (a) an acid (b) neutral (c) a base
21. 21.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the liquid we test (b) the colour we see (c) the turmeric paper
22. 22.True or false: warm water is needed for the yeast balloon. (a) True (b) False
23. 23.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) a small bottle (c) a battery cell (d) dry yeast
24. 24.🔮 Can the brown writing go back to being invisible? (a) yes, if cooled (b) yes, if shaken (c) yes, in the dark (d) no, it stays brown
25. 25.🧺 Do we need lemon juice for the turmeric test? (a) not needed (b) needed
26. 26.🫧 Is sugar water an acid, a base or neutral? (a) a base (b) neutral (c) an acid
27. 27.🫧 Is salt water an acid, a base or neutral? (a) a base (b) neutral (c) an acid
28. 28.🧺 Do we need cotton or cloth for the muddy water filter? (a) not needed (b) needed
29. 29.🔍 Which is the odd one out? (a) putting the iron away (b) ironing the paper (c) plugging in the iron (d) writing the message
30. 30.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) muddy water (b) a clean glass (c) cotton or cloth (d) a battery cell
31. 31.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “the cream temperature”? (a) we change it (b) we measure it (c) we keep it the same
32. 32.True or false: sugar is not needed for the yeast balloon. (a) False (b) True
33. 33.🔮 Predict: you stop shaking after only one minute. What do you have? (a) cheese (b) ghee (c) butter lumps (d) still runny cream
34. 34.🎈 Why does the balloon blow up? (a) outside air gets in (b) the bottle shrinks (c) vinegar is hot (d) gas is made inside
35. 35.True or false: soap solution turns turmeric reddish-brown. (a) True (b) False
36. 36.True or false: a magnet is not needed for the muddy water filter. (a) False (b) True
37. 37.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “the same jar”? (a) we change it (b) we measure it (c) we keep it the same
38. 38.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we keep it the same (b) we measure it (c) we change it
39. 39.🧺 Do we need a mirror for the turmeric test? (a) needed (b) not needed
40. 40.🧂 Does food colour dissolve in water? (a) does not dissolve (b) dissolves in water

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