Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 780 · 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 more baking soda blow the balloon up bigger? Which of these is kept the same? (a) spoons of baking soda (b) size of the balloon (c) the amount of vinegar
2. 2.🪴 Which part of a plant does this job: carry water upward? (a) flower (b) roots (c) leaves (d) stem
3. 3.🔍 Muddy water is left still for an hour. What happens to the mud? (a) it turns to sand (b) it sinks to the bottom (c) it dissolves (d) it floats on top
4. 4.⚖️ Fair test — do seeds need water to sprout? What do we do with “the kind of seeds”? (a) we change it (b) we measure it (c) we keep it the same
5. 5.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) folding paper (c) rusting iron (d) baking a cake
6. 6.True or false: bran from wheat flour is done by evaporating. (a) True (b) False
7. 7.🔍 Which is the odd one out? (a) soil (b) air (c) water (d) warmth
8. 8.🪴 Which of these is a job of the roots? (a) make food in sunlight (b) hold the plant in soil (c) hold up the leaves (d) give out water vapour
9. 9.🔮 Predict: a plant gets no water for many days in summer. What happens? (a) it wilts and droops (b) it turns blue (c) it grows faster (d) it flowers more
10. 10.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a small bottle (c) a mirror (d) dry yeast
11. 11.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) the amount of water (b) the amount of salt (c) the same dish (d) days to see crystals
12. 12.🧺 Do we need a seed for the fizzy balloon? (a) needed (b) not needed
13. 13.🛟 Who should use the hot iron in the secret message experiment? (a) only an adult (b) whoever is fastest (c) the youngest child (d) any child
14. 14.🫗 How do we separate bran from wheat flour? (a) sieving (b) winnowing (c) handpicking (d) filtering
15. 15.🔍 Which is the odd one out? (a) glucose powder (b) sand (c) table salt (d) sugar
16. 16.True or false: salt water is neutral. (a) True (b) False
17. 17.⚖️ 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 measure it (c) we keep it the same
18. 18.🍋 Why can’t you see the lemon writing once it dries? (a) dry juice is see-through (b) it turned into air (c) the ink is magnetic (d) the paper ate it
19. 19.🧈 Can this change be undone: baking a cake? (a) cannot be undone (b) can be undone
20. 20.True or false: turmeric powder is not needed for growing salt crystals. (a) True (b) False
21. 21.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) baking soda water (c) plain water (d) detergent water
22. 22.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) a dropper or spoon (c) water (d) a mirror
23. 23.🧈 Can this change be undone: freezing water? (a) can be undone (b) cannot be undone
24. 24.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: the kind of balloon is kept the same. (a) True (b) False
25. 25.True or false: tea leaves from tea is done by filtering. (a) False (b) True
26. 26.🧺 Which of these is needed for the muddy water filter? (a) a clean glass (b) yeast (c) a mirror (d) a battery cell
27. 27.🛟 Which safety rule fits the fizzy balloon experiment? (a) put it in your mouth (b) seal it in a glass jar (c) shake it near your face (d) keep it away from eyes
28. 28.🍞 Which of these is something yeast needs? (a) vinegar (b) sunlight (c) a magnet (d) sugar
29. 29.🧺 Do we need a magnet for growing salt crystals? (a) not needed (b) needed
30. 30.🧺 Which of these is needed for the leafy bag test? (a) a magnet (b) a rubber band (c) a battery cell (d) vinegar
31. 31.🍋 What colour does the lemon writing turn when an adult warms it? (a) blue (b) white (c) green (d) brown
32. 32.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: the amount of vinegar is kept the same. (a) False (b) True
33. 33.🫗 Muddy water is poured through a cloth filter. What stays on the cloth? (a) the mud (b) the water (c) nothing (d) the salt
34. 34.🧺 Which of these is needed for the fizzy balloon? (a) a tray for spills (b) a magnet (c) a mirror (d) sugar
35. 35.True or false: a battery cell is not needed for the fizzy balloon. (a) True (b) False
36. 36.⚖️ Fair test — do seeds need water to sprout? Which of these is kept the same? (a) wet or dry cotton (b) how many seeds sprout (c) the number of seeds
37. 37.🧺 Which of these is not needed for the yeast balloon? (a) warm water (b) a comb (c) sugar (d) dry yeast
38. 38.🧺 Do we need vinegar for the fizzy balloon? (a) not needed (b) needed
39. 39.🪴 Which of these is a job of the leaves? (a) hold up the leaves (b) carry water upward (c) make food in sunlight (d) make seeds
40. 40.📘 What do we call something that changes colour to show an acid or a base? (a) a prism (b) a magnet (c) an indicator (d) a pulley

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