Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 428 · 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: make seeds is a job of the stem. (a) False (b) True
2. 2.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) the same dish (b) sunny or shady place (c) the kind of salt (d) days to see crystals
3. 3.📘 What is yeast? (a) a kind of salt (b) a kind of stone (c) a tiny living fungus (d) a kind of sugar
4. 4.True or false: water is needed for a seed to sprout. (a) True (b) False
5. 5.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the kind of juice is kept the same. (a) True (b) False
6. 6.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the same bottle”? (a) we keep it the same (b) we change it (c) we measure it
7. 7.🔮 Predict: you use more vinegar and more baking soda. What happens to the balloon? (a) it grows bigger (b) there is no change (c) it turns blue (d) it shrinks
8. 8.🔮 Predict: you filter salty water through cloth. Does the salt stay on the cloth? (a) no, salt passes through (b) it turns to sand (c) it turns to sugar (d) yes, all of it
9. 9.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we keep it the same (b) we measure it (c) we change it
10. 10.🔍 Which is the odd one out? (a) small pebbles (b) glucose powder (c) food colour (d) sugar
11. 11.🛟 Lemon juice stings cuts and eyes. What should you do after the experiment? (a) lick your fingers (b) skip washing (c) rub your eyes (d) wash your hands
12. 12.🫗 Why does filtered muddy water look clearer? (a) the filter adds soap (b) the water evaporates (c) the mud dissolves (d) the filter traps mud
13. 13.🔍 Which is the odd one out? (a) folding paper (b) browning lemon ink (c) milk turning to curd (d) cooking an egg
14. 14.🧺 Do we need baking soda for the fizzy balloon? (a) needed (b) not needed
15. 15.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: the kind of balloon is kept the same. (a) False (b) True
16. 16.True or false: baking soda is not needed for the fizzy balloon. (a) False (b) True
17. 17.🧺 Which of these is needed for sprouting seeds? (a) a balloon (b) a small bowl (c) a magnet (d) yeast
18. 18.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it turns black (b) it turns blue (c) it turns red (d) it stays yellow
19. 19.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a bowl (b) a timer (c) a battery cell (d) fresh cream
20. 20.🌱 Is air needed for a seed to sprout? (a) needed to sprout (b) not needed to sprout
21. 21.🛟 How should the plastic bag be tied around the branch? (a) with a hot glue gun (b) as tight as possible (c) with sharp wire (d) gently, not too tight
22. 22.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the light we look in”? (a) we change it (b) we keep it the same (c) we measure it
23. 23.🔮 Predict: which gives more drops in the bag — a hot sunny day or a cool cloudy day? (a) the hot sunny day (b) the cool cloudy day (c) both the same (d) neither of them
24. 24.⚖️ 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
25. 25.🧺 Which of these is needed for the yeast balloon? (a) warm water (b) a mirror (c) a comb (d) a battery cell
26. 26.True or false: salt from sea water is done by evaporating. (a) False (b) True
27. 27.True or false: plain water is an acid. (a) True (b) False
28. 28.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the same dish”? (a) we keep it the same (b) we change it (c) we measure it
29. 29.True or false: a tray for spills is not needed for the fizzy balloon. (a) True (b) False
30. 30.True or false: air is needed for a seed to sprout. (a) False (b) True
31. 31.True or false: vinegar is needed for the fizzy balloon. (a) True (b) False
32. 32.🔍 Which is the odd one out? (a) soil (b) sugar (c) warmth (d) salt
33. 33.True or false: hold the plant in soil is a job of the roots. (a) False (b) True
34. 34.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the ironing time”? (a) we keep it the same (b) we change it (c) we measure it
35. 35.🧺 Do we need a clear plastic bag for the leafy bag test? (a) not needed (b) needed
36. 36.🌱 Which of these is needed for a seed to sprout? (a) sugar (b) air (c) soil (d) salt
37. 37.⚖️ 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) size of the balloon (c) the same bottle (d) spoons of baking soda
38. 38.🔍 Which is the odd one out? (a) vinegar (b) salt water (c) soap solution (d) lemon juice
39. 39.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the filter material is kept the same. (a) True (b) False
40. 40.🔮 Predict: a plant gets no water for many days in summer. What happens? (a) it turns blue (b) it flowers more (c) it grows faster (d) it wilts and droops

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