Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 521 · 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.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a tray for spills (b) a seed (c) a funnel or spoon (d) baking soda
2. 2.🧺 Which of these is not needed for sprouting seeds? (a) a few days (b) cotton wool (c) turmeric powder (d) moong seeds
3. 3.True or false: a mirror is not needed for the turmeric test. (a) False (b) True
4. 4.True or false: plugging in the iron is a job for an adult. (a) False (b) True
5. 5.True or false: a magnet is needed for sprouting seeds. (a) False (b) True
6. 6.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the kind of juice”? (a) we change it (b) we measure it (c) we keep it the same
7. 7.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “the amount of cream”? (a) we change it (b) we measure it (c) we keep it the same
8. 8.⚖️ Fair test — do seeds need water to sprout? What do we do with “the same place”? (a) we change it (b) we keep it the same (c) we measure it
9. 9.🧺 Which of these is needed for the muddy water filter? (a) a funnel (b) a magnet (c) a mirror (d) a balloon
10. 10.🧺 Which of these is not needed for the yeast balloon? (a) a battery cell (b) sugar (c) dry yeast (d) a small bottle
11. 11.True or false: cooking an egg is a change that can be undone. (a) True (b) False
12. 12.🍞 Which of these is something yeast does not need? (a) time (b) sugar (c) salt (d) warm water
13. 13.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is the one thing we change? (a) the kind of juice (b) the ironing time (c) the same paper (d) the iron setting
14. 14.🌱 Where does a sprouting seed get its first food from? (a) the cotton wool (b) the air (c) food stored in the seed (d) the sunlight only
15. 15.True or false: a few hours is needed for the leafy bag test. (a) False (b) True
16. 16.🛟 How should the plastic bag be tied around the branch? (a) as tight as possible (b) with sharp wire (c) gently, not too tight (d) with a hot glue gun
17. 17.🛟 After the yeast experiment, what should you do with the mixture? (a) keep it for a month (b) pour it down the sink (c) throw it at a wall (d) put it in your mouth
18. 18.🟡 Turmeric paper meets sugar water. What happens? (a) stays yellow (b) turns reddish-brown
19. 19.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is what we measure? (a) spoons of baking soda (b) the same bottle (c) the amount of vinegar (d) size of the balloon
20. 20.🟡 Turmeric paper meets vinegar. What happens? (a) stays yellow (b) turns reddish-brown
21. 21.🪴 Which part of a plant does this job: hold up the leaves? (a) roots (b) stem (c) leaves (d) flower
22. 22.🔍 Which is the odd one out? (a) folding paper (b) freezing water (c) milk turning to curd (d) melting ice
23. 23.🪴 Which part of a plant does this job: make seeds? (a) stem (b) flower (c) leaves (d) roots
24. 24.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is kept the same. (a) False (b) True
25. 25.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is what we measure? (a) how hard we shake (b) the same jar (c) the amount of cream (d) time to make butter
26. 26.🪴 Which of these is a job of the flower? (a) take in water from soil (b) make food in sunlight (c) hold the plant in soil (d) make seeds
27. 27.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a comb (b) vinegar (c) a balloon (d) an empty bottle
28. 28.True or false: turmeric powder is not needed for the leafy bag test. (a) False (b) True
29. 29.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the same bottles”? (a) we change it (b) we measure it (c) we keep it the same
30. 30.🧺 Do we need a small bowl for sprouting seeds? (a) needed (b) not needed
31. 31.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we change it (b) we measure it (c) we keep it the same
32. 32.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) bigger crystals (b) liquid crystals (c) smaller crystals (d) no crystals
33. 33.🧺 Which of these is needed for the fizzy balloon? (a) vinegar (b) a battery cell (c) a seed (d) a mirror
34. 34.🛟 The water for the yeast should be ___. (a) boiling hot (b) very salty (c) warm, not hot (d) ice cold
35. 35.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “the cream temperature”? (a) we keep it the same (b) we measure it (c) we change it
36. 36.🪴 Which of these is a job of the stem? (a) make seeds (b) hold the plant in soil (c) hold up the leaves (d) give out water vapour
37. 37.🧺 Do we need an adult with an iron for the secret lemon message? (a) not needed (b) needed
38. 38.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it grows faster (b) it turns to sugar (c) it glows (d) the yeast is killed
39. 39.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: the kind of plant is the one thing we change. (a) True (b) False
40. 40.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is kept the same? (a) the same paper (b) how dark the writing is (c) the kind of juice

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