Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 329 · 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.True or false: baking soda is needed for the fizzy balloon. (a) True (b) False
2. 2.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “the same jar”? (a) we keep it the same (b) we change it (c) we measure it
3. 3.🍋 What colour does the lemon writing turn when an adult warms it? (a) blue (b) green (c) white (d) brown
4. 4.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of water is the one thing we change. (a) True (b) False
5. 5.📘 The browning of lemon juice with heat is a ___ change. (a) magnetic (b) chemical (c) musical (d) physical
6. 6.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: the time we wait is the one thing we change. (a) False (b) True
7. 7.True or false: sugar from sugar water is done by winnowing. (a) False (b) True
8. 8.⚖️ 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 water (b) the water temperature (c) the amount of sugar (d) the same bottles
9. 9.🔮 Predict: you pour muddy water through two layers of cloth instead of one. The water comes out ___. (a) salty (b) hot (c) clearer (d) muddier
10. 10.⚖️ 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 kind of plant (c) amount of water drops (d) the same kind of bag
11. 11.🧺 Which of these is needed for the leafy bag test? (a) vinegar (b) turmeric powder (c) sunlight (d) a mirror
12. 12.🧺 Do we need a battery cell for the secret lemon message? (a) needed (b) not needed
13. 13.🧺 Which of these is needed for the secret lemon message? (a) yeast (b) a magnet (c) a cotton bud (d) a balloon
14. 14.🔮 Predict: the adult irons for only one second. What happens? (a) writing turns green (b) writing stays faint (c) the paper floats (d) it gets darker
15. 15.🌱 Which of these is not needed for a seed to sprout? (a) warmth (b) water (c) air (d) salt
16. 16.🔍 What do you see inside the plastic bag after a few hours in the sun? (a) salt crystals (b) tiny insects (c) nothing at all (d) tiny water drops
17. 17.⚖️ Fair test — do seeds need water to sprout? What do we do with “the same place”? (a) we measure it (b) we keep it the same (c) we change it
18. 18.🧺 Which of these is needed for the fizzy balloon? (a) a magnet (b) a mirror (c) a tray for spills (d) sugar
19. 19.⚖️ 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
20. 20.⚖️ 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 change it (c) we measure it
21. 21.🫗 How do we separate gravel from fine sand? (a) sieving (b) winnowing (c) evaporating (d) handpicking
22. 22.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) a funnel (b) a battery cell (c) cotton or cloth (d) muddy water
23. 23.🔮 Predict: you cover the dish so no water can escape. What happens? (a) few or no crystals (b) crystals grow faster (c) it fizzes (d) it turns sweet
24. 24.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is what we measure? (a) the iron setting (b) the same cotton bud (c) how dark the writing is (d) the ironing time
25. 25.🟡 Turmeric paper meets lemon juice. What happens? (a) stays yellow (b) turns reddish-brown
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 change it (c) we keep it the same
27. 27.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the kind of juice”? (a) we measure it (b) we keep it the same (c) we change it
28. 28.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) a few days (b) moong seeds (c) a balloon (d) water
29. 29.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) muddy water (b) a clean glass (c) a balloon (d) sand and pebbles
30. 30.🧺 Which of these is needed for making butter? (a) turmeric powder (b) a magnet (c) a balloon (d) a bowl
31. 31.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) moong seeds (b) a small bowl (c) cotton wool (d) yeast
32. 32.🔮 Predict: which gives more drops in the bag — a hot sunny day or a cool cloudy day? (a) both the same (b) neither of them (c) the cool cloudy day (d) the hot sunny day
33. 33.🍞 Where is yeast used in the kitchen? (a) to make bread rise (b) to colour rice (c) to clean floors (d) to wash dishes
34. 34.🧺 Do we need a small bowl for the secret lemon message? (a) not needed (b) needed
35. 35.🪴 Which of these is a job of the stem? (a) make food in sunlight (b) hold the plant in soil (c) make seeds (d) carry water upward
36. 36.🌱 Is water needed for a seed to sprout? (a) not needed to sprout (b) needed to sprout
37. 37.🛟 After the yeast experiment, what should you do with the mixture? (a) keep it for a month (b) throw it at a wall (c) put it in your mouth (d) pour it down the sink
38. 38.🧺 Do we need yeast for the leafy bag test? (a) needed (b) not needed
39. 39.🫧 Which of these is an acid? (a) baking soda water (b) vinegar (c) detergent water (d) soap solution
40. 40.True or false: cooking oil dissolves in water. (a) True (b) False

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