Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 190 · 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.🧺 Do we need a battery cell for the turmeric test? (a) needed (b) not needed
2. 2.🧺 Do we need a battery cell for growing salt crystals? (a) needed (b) not needed
3. 3.🧺 Do we need cotton wool for sprouting seeds? (a) needed (b) not needed
4. 4.True or false: take in water from soil is a job of the roots. (a) False (b) True
5. 5.True or false: sunlight is something yeast does not need. (a) True (b) False
6. 6.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) sugar (c) a magnet (d) a small bottle
7. 7.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is the one thing we change? (a) the iron setting (b) how dark the writing is (c) the same paper (d) the kind of juice
8. 8.🔮 Predict: you write with plain water instead of lemon juice. What appears after ironing? (a) a rainbow (b) blue words (c) almost nothing (d) dark brown words
9. 9.True or false: a clear plastic bag is not needed for the leafy bag test. (a) False (b) True
10. 10.🧺 Do we need an adult with an iron for the secret lemon message? (a) needed (b) not needed
11. 11.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) yeast (b) lemon juice (c) a small bowl (d) white paper
12. 12.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the amount of water”? (a) we keep it the same (b) we measure it (c) we change it
13. 13.⚖️ 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 change it (c) we measure it
14. 14.🧺 Which of these is not needed for sprouting seeds? (a) turmeric powder (b) a few days (c) cotton wool (d) moong seeds
15. 15.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the turmeric paper (b) the number of drops (c) the light we look in (d) the liquid we test
16. 16.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) bigger crystals (c) liquid crystals (d) no crystals
17. 17.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is the one thing we change? (a) the same jar (b) time to make butter (c) the cream temperature (d) the amount of cream
18. 18.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the water temperature is what we measure. (a) False (b) True
19. 19.🍞 Why do we add sugar to the yeast? (a) to make it heavy (b) to make it sweet (c) it is food for yeast (d) to colour it
20. 20.🌱 Is warmth needed for a seed to sprout? (a) not needed to sprout (b) needed to sprout
21. 21.🧺 Which of these is needed for the leafy bag test? (a) a mirror (b) a clear plastic bag (c) yeast (d) a magnet
22. 22.🪴 Which part of a plant does this job: carry water upward? (a) stem (b) flower (c) leaves (d) roots
23. 23.🔮 Predict: a plant gets no water for many days in summer. What happens? (a) it turns blue (b) it grows faster (c) it flowers more (d) it wilts and droops
24. 24.🛟 Why is a plastic jar a good choice for shaking? (a) it is magnetic (b) it is heavier (c) it will not break (d) it is hotter
25. 25.True or false: a comb is not needed for the fizzy balloon. (a) False (b) True
26. 26.🌱 Which of these sprouts in a few days? (a) boiled seeds (b) seeds on dry cotton (c) wet seeds in the dark (d) seeds in the freezer
27. 27.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is kept the same? (a) how dark the writing is (b) the kind of juice (c) the same cotton bud
28. 28.🔍 Which is the odd one out? (a) time (b) warm water (c) sugar (d) salt
29. 29.🧺 Which of these is not needed for the fizzy balloon? (a) a tray for spills (b) a balloon (c) an empty bottle (d) a battery cell
30. 30.🔍 Which is the odd one out? (a) plain water (b) detergent water (c) baking soda water (d) soap solution
31. 31.🫧 Is sugar water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
32. 32.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) white paper strips (c) a mirror (d) lemon juice
33. 33.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is the one thing we change? (a) the same glass (b) the filter material (c) how clear the water is (d) the amount poured
34. 34.🧺 Which of these is needed for making butter? (a) turmeric powder (b) a jar with a tight lid (c) a magnet (d) yeast
35. 35.🫧 Which of these is a base? (a) soap solution (b) lemon juice (c) plain water (d) salt water
36. 36.🧺 Do we need dry yeast for the yeast balloon? (a) not needed (b) needed
37. 37.🧈 Can this change be undone: melting ice? (a) cannot be undone (b) can be undone
38. 38.🔍 Which is the odd one out? (a) baking soda water (b) soap solution (c) detergent water (d) tamarind water
39. 39.📘 Vinegar is an acid and baking soda is a base. What happens when they meet? (a) they float apart (b) they react (c) they freeze (d) they become magnets
40. 40.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a potted plant (b) a few hours (c) sunlight (d) yeast

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