Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 902 · 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.🌱 Which of these is not needed for a seed to sprout? (a) warmth (b) water (c) air (d) sunlight
2. 2.True or false: an empty bottle is not needed for the fizzy balloon. (a) True (b) False
3. 3.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) reddish (b) green (c) bright blue (d) white at once
4. 4.True or false: salt is something yeast does not need. (a) False (b) True
5. 5.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows much faster (b) it turns yellow (c) it bursts at once (d) it grows very little
6. 6.🍋 Why does the lemon writing turn brown with heat? (a) the juice scorches first (b) heat adds colour (c) the iron is brown (d) paper turns lemony
7. 7.🧺 Which of these is not needed for the fizzy balloon? (a) a mirror (b) vinegar (c) baking soda (d) an empty bottle
8. 8.🍞 Which of these is something yeast does not need? (a) salt (b) warm water (c) sugar (d) time
9. 9.🧺 Do we need a jar with a tight lid for making butter? (a) not needed (b) needed
10. 10.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) a dropper or spoon (c) a magnet (d) white paper strips
11. 11.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: the same kind of bag is what we measure. (a) False (b) True
12. 12.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of water is kept the same. (a) False (b) True
13. 13.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? Which of these is the one thing we change? (a) the same kind of bag (b) sun or shade (c) the size of the plant (d) the kind of plant
14. 14.🍋 What colour does the lemon writing turn when an adult warms it? (a) white (b) blue (c) green (d) brown
15. 15.🧺 Which of these is needed for the muddy water filter? (a) a magnet (b) a battery cell (c) yeast (d) cotton or cloth
16. 16.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a magnet (b) lemon juice (c) a cotton bud (d) white paper
17. 17.True or false: browning lemon ink is a change that can be undone. (a) True (b) False
18. 18.🪴 Which of these is a job of the leaves? (a) carry water upward (b) hold the plant in soil (c) give out water vapour (d) take in water from soil
19. 19.🧺 Do we need a mirror for the leafy bag test? (a) not needed (b) needed
20. 20.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is the one thing we change? (a) how clear the water is (b) the same muddy water (c) the filter material (d) the amount poured
21. 21.🛟 Who should pour the warm water for the crystal experiment? (a) a friend who is running (b) the youngest child (c) nobody needs to (d) a grown-up
22. 22.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “spoons of baking soda”? (a) we change it (b) we keep it the same (c) we measure it
23. 23.🔍 Which is the odd one out? (a) curd (b) soap solution (c) vinegar (d) tamarind water
24. 24.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the same cotton bud”? (a) we change it (b) we measure it (c) we keep it the same
25. 25.🧂 Does baking soda dissolve in water? (a) dissolves in water (b) does not dissolve
26. 26.True or false: an adult with an iron is needed for the secret lemon message. (a) False (b) True
27. 27.🫧 Which of these is an acid? (a) soap solution (b) salt water (c) detergent water (d) orange juice
28. 28.🧺 Do we need a mirror for sprouting seeds? (a) not needed (b) needed
29. 29.True or false: tamarind water is neutral. (a) True (b) False
30. 30.True or false: a magnet is not needed for sprouting seeds. (a) True (b) False
31. 31.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we measure it (b) we change it (c) we keep it the same
32. 32.🛟 Turmeric stains clothes. What should you wear? (a) your school uniform (b) an old shirt or apron (c) a white party dress (d) your best clothes
33. 33.🍞 Which of these is something yeast needs? (a) warm water (b) a magnet (c) sunlight (d) vinegar
34. 34.🌱 Which of these sprouts in a few days? (a) boiled seeds (b) seeds on dry cotton (c) seeds in the freezer (d) seeds on wet cotton
35. 35.True or false: fresh cream is needed for making butter. (a) True (b) False
36. 36.⚖️ 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 measure it (b) we change it (c) we keep it the same
37. 37.⚖️ 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
38. 38.🔍 Which is the odd one out? (a) chalk powder (b) sand (c) cooking oil (d) sugar
39. 39.🔮 Predict: the jar is filled right to the top with cream. What happens? (a) it takes much longer (b) it is much faster (c) it turns pink (d) it makes salt
40. 40.⚖️ 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) the amount of yeast (b) size of the balloon (c) the water temperature (d) the same bottles

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