Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 307 · 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 secret lemon message. Which one is NOT needed? (a) an adult with an iron (b) white paper (c) a battery cell (d) lemon juice
2. 2.True or false: take in water from soil is a job of the roots. (a) True (b) False
3. 3.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is the one thing we change. (a) False (b) True
4. 4.🔍 Which is the odd one out? (a) putting the iron away (b) cutting the lemon (c) plugging in the iron (d) reading the message
5. 5.True or false: carry water upward is a job of the stem. (a) False (b) True
6. 6.True or false: a balloon is needed for the muddy water filter. (a) True (b) False
7. 7.🪴 Through which part does a plant take in water from the soil? (a) the fruits (b) the flowers (c) the roots (d) the leaves
8. 8.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) baking a cake (c) rusting iron (d) melting butter
9. 9.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a potted plant (b) a clear plastic bag (c) turmeric powder (d) sunlight
10. 10.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) turmeric powder (b) salt (c) a shallow dish (d) a piece of string
11. 11.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: time to make butter is what we measure. (a) True (b) False
12. 12.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “sun or shade”? (a) we change it (b) we keep it the same (c) we measure it
13. 13.⚖️ Fair test — do seeds need water to sprout? True or false: the same place is the one thing we change. (a) True (b) False
14. 14.🪴 Which part of a plant does this job: give out water vapour? (a) roots (b) stem (c) leaves (d) flower
15. 15.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is what we measure? (a) the same jar (b) the cream temperature (c) time to make butter (d) how hard we shake
16. 16.🧈 Can this change be undone: freezing water? (a) can be undone (b) cannot be undone
17. 17.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the iron setting is kept the same. (a) True (b) False
18. 18.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a jar with a tight lid (b) cold water to rinse (c) turmeric powder (d) fresh cream
19. 19.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: the amount of vinegar is kept the same. (a) True (b) False
20. 20.🌱 Will these sprout: wet seeds by a window? (a) does not sprout (b) sprouts
21. 21.🧺 Which of these is needed for sprouting seeds? (a) a mirror (b) a magnet (c) yeast (d) moong seeds
22. 22.🛟 After the yeast experiment, what should you do with the mixture? (a) keep it for a month (b) put it in your mouth (c) pour it down the sink (d) throw it at a wall
23. 23.🧺 Do we need an empty bottle for the fizzy balloon? (a) needed (b) not needed
24. 24.True or false: yeast is not needed for the secret lemon message. (a) True (b) False
25. 25.True or false: warm water is something yeast needs. (a) True (b) False
26. 26.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) the yeast is killed (b) it grows faster (c) it glows (d) it turns to sugar
27. 27.🌱 Which of these is needed for a seed to sprout? (a) salt (b) water (c) sugar (d) soil
28. 28.True or false: detergent water is an acid. (a) False (b) True
29. 29.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) cold water to rinse (b) a bowl (c) a balloon (d) a timer
30. 30.🌱 Is warmth needed for a seed to sprout? (a) needed to sprout (b) not needed to sprout
31. 31.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is kept the same. (a) True (b) False
32. 32.📘 The browning of lemon juice with heat is a ___ change. (a) magnetic (b) musical (c) chemical (d) physical
33. 33.🛟 What should you do if vinegar splashes in your eye? (a) ignore it (b) rub it hard (c) rinse with clean water (d) add baking soda
34. 34.🍋 Which of these steps is a job a child can do? (a) plugging in the iron (b) dipping the cotton bud (c) ironing the paper (d) cutting the lemon
35. 35.🪴 Which part of a plant does this job: hold up the leaves? (a) roots (b) flower (c) stem (d) leaves
36. 36.🔍 Which is the odd one out? (a) vinegar (b) lemon juice (c) sugar water (d) soap solution
37. 37.True or false: chaff from wheat grain is done by winnowing. (a) True (b) False
38. 38.⚖️ 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 measure it (c) we change it
39. 39.🛟 Which rule keeps the turmeric test safe? (a) sniff each bottle hard (b) sip each liquid (c) mix bathroom cleaners (d) use only kitchen items
40. 40.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) warm water (c) a spoon (d) yeast

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