Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 182 · 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.🎈 Why does the balloon blow up? (a) vinegar is hot (b) gas is made inside (c) outside air gets in (d) the bottle shrinks
2. 2.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we keep it the same (b) we change it (c) we measure it
3. 3.🔍 Which is the odd one out? (a) salt (b) sunlight (c) air (d) sugar
4. 4.🔍 Which is the odd one out? (a) plugging in the iron (b) ironing the paper (c) reading the message (d) cutting the lemon
5. 5.🛟 Which rule keeps the turmeric test safe? (a) use only kitchen items (b) sip each liquid (c) mix bathroom cleaners (d) sniff each bottle hard
6. 6.🛟 Turmeric stains clothes. What should you wear? (a) an old shirt or apron (b) your best clothes (c) your school uniform (d) a white party dress
7. 7.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: amount of water drops is what we measure. (a) False (b) True
8. 8.🔍 Which is the odd one out? (a) lemon juice (b) plain water (c) detergent water (d) salt water
9. 9.True or false: sand and pebbles is needed for the muddy water filter. (a) False (b) True
10. 10.🍞 Which of these is something yeast does not need? (a) warm water (b) time (c) sugar (d) salt
11. 11.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “the size of the plant”? (a) we keep it the same (b) we measure it (c) we change it
12. 12.🫧 Which gas fills the balloon in the baking soda and vinegar experiment? (a) helium (b) hydrogen (c) carbon dioxide (d) oxygen
13. 13.🍞 Does yeast need sunlight to make gas? (a) yeast does not need it (b) yeast needs it
14. 14.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) the amount of water (b) the amount of sugar (c) size of the balloon (d) the same bottles
15. 15.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is what we measure. (a) True (b) False
16. 16.🌱 Which of these sprouts in a few days? (a) boiled seeds (b) seeds on dry cotton (c) seeds in the freezer (d) wet seeds in the dark
17. 17.🔮 Predict: which gives more drops in the bag — a hot sunny day or a cool cloudy day? (a) both the same (b) the cool cloudy day (c) neither of them (d) the hot sunny day
18. 18.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the water temperature”? (a) we change it (b) we keep it the same (c) we measure it
19. 19.True or false: melting butter is a change that cannot be undone. (a) False (b) True
20. 20.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is the one thing we change? (a) size of the balloon (b) the amount of sugar (c) the amount of yeast (d) the water temperature
21. 21.True or false: reading the message is a job for an adult. (a) False (b) True
22. 22.🌱 Seeds need water, air and ___ to sprout. (a) sugar (b) warmth (c) soil (d) salt
23. 23.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? Which of these is kept the same? (a) amount of water drops (b) sun or shade (c) the same kind of bag
24. 24.🔍 Which is the odd one out? (a) writing the message (b) reading the message (c) ironing the paper (d) dipping the cotton bud
25. 25.🪴 Which of these is a job of the roots? (a) make food in sunlight (b) carry water upward (c) hold up the leaves (d) take in water from soil
26. 26.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “how clear the water is”? (a) we measure it (b) we keep it the same (c) we change it
27. 27.🛟 Where should you keep the crystal dish while it dries? (a) safe from small children (b) on the edge of a table (c) in a busy doorway (d) next to the baby
28. 28.🧈 Which of these is a change that cannot be undone? (a) browning lemon ink (b) melting butter (c) folding paper (d) freezing water
29. 29.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) melting ice (c) baking a cake (d) melting butter
30. 30.🧈 Can this change be undone: rusting iron? (a) cannot be undone (b) can be undone
31. 31.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) a battery cell (c) a small bottle (d) a comb
32. 32.🔍 Which is the odd one out? (a) sugar water (b) lemon juice (c) curd (d) vinegar
33. 33.🔍 Which is the odd one out? (a) sugar (b) time (c) vinegar (d) warm water
34. 34.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “sunny or shady place”? (a) we measure it (b) we keep it the same (c) we change it
35. 35.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) dry yeast (c) a paper clip (d) warm water
36. 36.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the ironing time is kept the same. (a) True (b) False
37. 37.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) days to see crystals (b) the same dish (c) the kind of salt (d) sunny or shady place
38. 38.True or false: lemon juice is needed for the turmeric test. (a) False (b) True
39. 39.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the kind of balloon”? (a) we measure it (b) we keep it the same (c) we change it
40. 40.True or false: a battery cell is needed for growing salt crystals. (a) True (b) False

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