Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 335 · 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: writing the message is a job for an adult. (a) True (b) False
2. 2.True or false: writing the message is a job a child can do. (a) True (b) False
3. 3.🔮 Predict: a plant gets no water for many days in summer. What happens? (a) it turns blue (b) it wilts and droops (c) it grows faster (d) it flowers more
4. 4.🧺 Which of these is not needed for sprouting seeds? (a) cotton wool (b) moong seeds (c) a magnet (d) a few days
5. 5.True or false: a mirror is needed for growing salt crystals. (a) True (b) False
6. 6.🌱 Which of these is not needed for a seed to sprout? (a) air (b) sugar (c) water (d) warmth
7. 7.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a clear plastic bag (b) vinegar (c) a potted plant (d) a few hours
8. 8.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed
9. 9.🧺 Which of these is needed for sprouting seeds? (a) yeast (b) moong seeds (c) a mirror (d) a magnet
10. 10.🫗 Why does filtered muddy water look clearer? (a) the filter adds soap (b) the mud dissolves (c) the water evaporates (d) the filter traps mud
11. 11.🍞 Does yeast need sugar to make gas? (a) yeast does not need it (b) yeast needs it
12. 12.🧺 Which of these is needed for the muddy water filter? (a) a funnel (b) a magnet (c) a battery cell (d) yeast
13. 13.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “days to see crystals”? (a) we change it (b) we measure it (c) we keep it the same
14. 14.🧺 Do we need a battery cell for the turmeric test? (a) not needed (b) needed
15. 15.True or false: cotton or cloth is not needed for the muddy water filter. (a) False (b) True
16. 16.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is kept the same? (a) the kind of balloon (b) spoons of baking soda (c) size of the balloon
17. 17.🧺 Which of these is needed for making butter? (a) a battery cell (b) a timer (c) a mirror (d) yeast
18. 18.📘 The browning of lemon juice with heat is a ___ change. (a) physical (b) magnetic (c) musical (d) chemical
19. 19.True or false: a magnet is something yeast needs. (a) True (b) False
20. 20.True or false: a seed is needed for the fizzy balloon. (a) True (b) False
21. 21.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns blue (b) it stays yellow (c) reddish-brown (d) it turns green
22. 22.🧺 Which of these is needed for the fizzy balloon? (a) a comb (b) a balloon (c) a seed (d) a battery cell
23. 23.⚖️ 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 time we wait (b) the kind of plant (c) amount of water drops (d) sun or shade
24. 24.🟡 Which of these keeps turmeric yellow? (a) detergent water (b) soap solution (c) baking soda water (d) plain water
25. 25.🔮 Predict: you pour muddy water through two layers of cloth instead of one. The water comes out ___. (a) clearer (b) hot (c) salty (d) muddier
26. 26.🫧 Which gas fills the balloon in the baking soda and vinegar experiment? (a) oxygen (b) hydrogen (c) helium (d) carbon dioxide
27. 27.True or false: vinegar is something yeast does not need. (a) True (b) False
28. 28.🔍 Which is the odd one out? (a) sugar water (b) salt water (c) tamarind water (d) plain water
29. 29.⚖️ Fair test — do seeds need water to sprout? Which of these is kept the same? (a) the same place (b) wet or dry cotton (c) how many seeds sprout
30. 30.True or false: turmeric powder is not needed for the leafy bag test. (a) False (b) True
31. 31.📘 Vinegar is an acid and baking soda is a base. What happens when they meet? (a) they float apart (b) they become magnets (c) they react (d) they freeze
32. 32.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is the one thing we change. (a) True (b) False
33. 33.⚖️ 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
34. 34.🧺 Which of these is needed for the secret lemon message? (a) turmeric powder (b) a battery cell (c) lemon juice (d) a magnet
35. 35.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) bigger crystals (c) liquid crystals (d) no crystals
36. 36.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: spoons of baking soda is what we measure. (a) True (b) False
37. 37.🫧 Is vinegar an acid, a base or neutral? (a) an acid (b) a base (c) neutral
38. 38.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is what we measure? (a) how dark the writing is (b) the same paper (c) the iron setting (d) the kind of juice
39. 39.⚖️ 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
40. 40.🧺 Do we need a few hours for the leafy bag test? (a) not needed (b) needed

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