Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 292 · 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 a plant in the sun give out more water than one in the shade? Which of these is what we measure? (a) sun or shade (b) the size of the plant (c) amount of water drops (d) the same kind of bag
2. 2.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) no crystals (c) liquid crystals (d) bigger crystals
3. 3.🍞 Does yeast need a magnet to make gas? (a) yeast needs it (b) yeast does not need it
4. 4.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: size of the balloon is the one thing we change. (a) True (b) False
5. 5.🍞 Which of these is something yeast does not need? (a) sunlight (b) time (c) sugar (d) warm water
6. 6.⚖️ Fair test — do seeds need water to sprout? What do we do with “wet or dry cotton”? (a) we keep it the same (b) we measure it (c) we change it
7. 7.⚖️ Fair test — do seeds need water to sprout? Which of these is the one thing we change? (a) the same bowls (b) the same place (c) wet or dry cotton (d) the number of seeds
8. 8.🧺 Which of these is needed for the leafy bag test? (a) a mirror (b) turmeric powder (c) a magnet (d) a clear plastic bag
9. 9.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a battery cell (b) a funnel or spoon (c) a tray for spills (d) a balloon
10. 10.🧈 Can this change be undone: melting ice? (a) cannot be undone (b) can be undone
11. 11.🧺 Do we need white paper for the secret lemon message? (a) needed (b) not needed
12. 12.True or false: warm water is something yeast does not need. (a) True (b) False
13. 13.🌱 Which of these is not needed for a seed to sprout? (a) warmth (b) soil (c) air (d) water
14. 14.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the same cotton bud”? (a) we measure it (b) we change it (c) we keep it the same
15. 15.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it stays yellow (b) it turns green (c) reddish-brown (d) it turns blue
16. 16.🧺 Which of these is not needed for the leafy bag test? (a) sunlight (b) a potted plant (c) a few hours (d) a battery cell
17. 17.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: how hard we shake is the one thing we change. (a) True (b) False
18. 18.🟡 Which of these turns turmeric reddish-brown? (a) detergent water (b) sugar water (c) tamarind water (d) vinegar
19. 19.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: the same jar is the one thing we change. (a) False (b) True
20. 20.🍋 Which of these steps is a job a child can do? (a) cutting the lemon (b) letting the paper dry (c) plugging in the iron (d) ironing the paper
21. 21.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) yeast (b) a clean glass (c) a funnel (d) sand and pebbles
22. 22.True or false: lemon juice is a base. (a) False (b) True
23. 23.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the water temperature”? (a) we measure it (b) we change it (c) we keep it the same
24. 24.True or false: chaff from wheat grain is done by handpicking. (a) False (b) True
25. 25.🔮 Predict: tea is poured through a strainer. What happens to the tea leaves? (a) leaves stay behind (b) tea stays behind (c) both stay behind (d) leaves pass through
26. 26.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the kind of balloon”? (a) we measure it (b) we keep it the same (c) we change it
27. 27.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? Which of these is kept the same? (a) amount of water drops (b) sun or shade (c) the size of the plant
28. 28.True or false: melting ice is a change that cannot be undone. (a) True (b) False
29. 29.True or false: a few hours is needed for the leafy bag test. (a) True (b) False
30. 30.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the ironing time”? (a) we measure it (b) we change it (c) we keep it the same
31. 31.🔍 Which is the odd one out? (a) cutting the lemon (b) letting the paper dry (c) ironing the paper (d) putting the iron away
32. 32.🍞 Which of these is something yeast needs? (a) warm water (b) a magnet (c) salt (d) vinegar
33. 33.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: spoons of baking soda is kept the same. (a) False (b) True
34. 34.🌱 Which of these sprouts in a few days? (a) seeds on dry cotton (b) boiled seeds (c) seeds in the freezer (d) wet seeds in the dark
35. 35.True or false: hold up the leaves is a job of the stem. (a) True (b) False
36. 36.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) cooking an egg (c) dissolving salt (d) baking a cake
37. 37.True or false: a comb is not needed for the yeast balloon. (a) True (b) False
38. 38.🧂 Which of these dissolves in water? (a) small pebbles (b) baking soda (c) sand (d) sawdust
39. 39.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) cooking an egg (c) folding paper (d) melting butter
40. 40.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) sugar (c) a balloon (d) a mirror

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