Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 966 · 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.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: the kind of balloon is what we measure. (a) False (b) True
2. 2.🛟 After the yeast experiment, what should you do with the mixture? (a) keep it for a month (b) put it in your mouth (c) throw it at a wall (d) pour it down the sink
3. 3.True or false: a small bowl is not needed for the secret lemon message. (a) True (b) False
4. 4.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a spoon (c) turmeric powder (d) a piece of string
5. 5.🧺 Which of these is not needed for the secret lemon message? (a) an adult with an iron (b) a cotton bud (c) a mirror (d) a small bowl
6. 6.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: spoons of baking soda is the one thing we change. (a) False (b) True
7. 7.🧂 Does table salt dissolve in water? (a) does not dissolve (b) dissolves in water
8. 8.🛟 What should you do if vinegar splashes in your eye? (a) rub it hard (b) rinse with clean water (c) ignore it (d) add baking soda
9. 9.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it turns yellow (b) it grows much faster (c) it grows very little (d) it bursts at once
10. 10.🫧 Is sugar water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
11. 11.True or false: food colour dissolves in water. (a) False (b) True
12. 12.🍞 Which of these is something yeast needs? (a) vinegar (b) sunlight (c) a magnet (d) sugar
13. 13.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the iron setting”? (a) we measure it (b) we change it (c) we keep it the same
14. 14.🧺 Which of these is not needed for the leafy bag test? (a) vinegar (b) a potted plant (c) a rubber band (d) sunlight
15. 15.True or false: vinegar is needed for the leafy bag test. (a) False (b) True
16. 16.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the filter material”? (a) we measure it (b) we change it (c) we keep it the same
17. 17.🧂 Which of these dissolves in water? (a) sugar (b) cooking oil (c) small pebbles (d) sawdust
18. 18.🧺 Which of these is not needed for the turmeric test? (a) white paper strips (b) yeast (c) soap solution (d) turmeric powder
19. 19.🫗 Which of these is done by handpicking? (a) small stones from dal (b) mud from water (c) bran from wheat flour (d) gravel from fine sand
20. 20.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: spoons of baking soda is kept the same. (a) True (b) False
21. 21.🔮 Predict: you tie a bag on a branch with no leaves. Will it collect much water? (a) much more water (b) it fills with soil (c) exactly the same (d) much less water
22. 22.🛟 Why is a plastic jar a good choice for shaking? (a) it is magnetic (b) it is heavier (c) it is hotter (d) it will not break
23. 23.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is kept the same. (a) False (b) True
24. 24.🍞 Which of these is something yeast needs? (a) warm water (b) vinegar (c) salt (d) a magnet
25. 25.🧺 Which of these is needed for growing salt crystals? (a) a shallow dish (b) turmeric powder (c) yeast (d) a balloon
26. 26.True or false: sugar is needed for the yeast balloon. (a) True (b) False
27. 27.⚖️ Fair test — do seeds need water to sprout? Which of these is what we measure? (a) the same bowls (b) how many seeds sprout (c) the kind of seeds (d) wet or dry cotton
28. 28.🧂 Does chalk powder dissolve in water? (a) does not dissolve (b) dissolves in water
29. 29.🧺 Which of these is needed for the muddy water filter? (a) a balloon (b) a magnet (c) sand and pebbles (d) a mirror
30. 30.🛟 Who should pour the warm water for the crystal experiment? (a) a grown-up (b) nobody needs to (c) a friend who is running (d) the youngest child
31. 31.🫗 Muddy water is poured through a cloth filter. What stays on the cloth? (a) the mud (b) the salt (c) the water (d) nothing
32. 32.🛟 Why must the jar lid be screwed on tightly? (a) so it gets hot (b) so it turns yellow (c) so air gets out (d) so cream does not spill
33. 33.🍋 Secret message: who does this step — plugging in the iron? (a) an adult does it (b) a child can do it
34. 34.⚖️ 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) size of the balloon (c) the same bottles (d) the amount of sugar
35. 35.🧺 Do we need cotton wool for sprouting seeds? (a) needed (b) not needed
36. 36.🧈 Can this change be undone: rusting iron? (a) cannot be undone (b) can be undone
37. 37.🎈 Why does the balloon blow up? (a) gas is made inside (b) outside air gets in (c) the bottle shrinks (d) vinegar is hot
38. 38.🪴 Which part of a plant does this job: give out water vapour? (a) flower (b) stem (c) leaves (d) roots
39. 39.True or false: turmeric powder is not needed for the muddy water filter. (a) False (b) True
40. 40.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the amount of vinegar”? (a) we keep it the same (b) we measure it (c) we change it

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