Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 550 · 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.🍋 Why can’t you see the lemon writing once it dries? (a) the paper ate it (b) the ink is magnetic (c) dry juice is see-through (d) it turned into air
2. 2.🫧 What do you see when baking soda meets vinegar? (a) lots of fizzy bubbles (b) it turns to ice (c) nothing at all (d) it glows in the dark
3. 3.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “how dark the writing is”? (a) we measure it (b) we change it (c) we keep it the same
4. 4.True or false: freezing water is a change that cannot be undone. (a) True (b) False
5. 5.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns red (b) it turns black (c) it turns blue (d) it stays yellow
6. 6.🧺 Do we need a funnel or spoon for the fizzy balloon? (a) needed (b) not needed
7. 7.🔍 Which is the odd one out? (a) time (b) sugar (c) warm water (d) salt
8. 8.🧺 Which of these is needed for the leafy bag test? (a) a battery cell (b) a mirror (c) turmeric powder (d) a few hours
9. 9.🍞 Does yeast need warm water to make gas? (a) yeast needs it (b) yeast does not need it
10. 10.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) turmeric powder (c) a balloon (d) warm water
11. 11.True or false: a jar with a tight lid is needed for making butter. (a) True (b) False
12. 12.True or false: a few hours is needed for the leafy bag test. (a) False (b) True
13. 13.True or false: reading the message is a job for an adult. (a) False (b) True
14. 14.🛟 What should you do if vinegar splashes in your eye? (a) rub it hard (b) rinse with clean water (c) ignore it (d) add baking soda
15. 15.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) a few days (b) a battery cell (c) moong seeds (d) a small bowl
16. 16.True or false: a magnet is needed for the muddy water filter. (a) True (b) False
17. 17.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a balloon (c) a piece of string (d) salt
18. 18.🧺 Do we need a battery cell for the turmeric test? (a) not needed (b) needed
19. 19.🧺 Which of these is needed for growing salt crystals? (a) salt (b) a magnet (c) a balloon (d) a mirror
20. 20.🍋 What colour does the lemon writing turn when an adult warms it? (a) brown (b) green (c) blue (d) white
21. 21.🧺 Which of these is not needed for the leafy bag test? (a) a few hours (b) a clear plastic bag (c) sunlight (d) vinegar
22. 22.⚖️ Fair test — do seeds need water to sprout? True or false: how many seeds sprout is what we measure. (a) False (b) True
23. 23.⚖️ Fair test — do seeds need water to sprout? What do we do with “the same bowls”? (a) we change it (b) we measure it (c) we keep it the same
24. 24.🧺 Which of these is not needed for the fizzy balloon? (a) a funnel or spoon (b) baking soda (c) a comb (d) a tray for spills
25. 25.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) a funnel (b) a clean glass (c) turmeric powder (d) sand and pebbles
26. 26.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the ironing time”? (a) we keep it the same (b) we change it (c) we measure it
27. 27.🪴 Which part of a plant does this job: make food in sunlight? (a) leaves (b) stem (c) roots (d) flower
28. 28.🛟 Who should use the hot iron in the secret message experiment? (a) only an adult (b) any child (c) whoever is fastest (d) the youngest child
29. 29.🌱 Seeds need water, air and ___ to sprout. (a) soil (b) salt (c) warmth (d) sugar
30. 30.🧂 Does sawdust dissolve in water? (a) dissolves in water (b) does not dissolve
31. 31.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is kept the same? (a) size of the balloon (b) the kind of balloon (c) spoons of baking soda
32. 32.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “the time we wait”? (a) we change it (b) we keep it the same (c) we measure it
33. 33.🧺 Which of these is needed for the muddy water filter? (a) turmeric powder (b) a magnet (c) muddy water (d) yeast
34. 34.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: the kind of plant is the one thing we change. (a) True (b) False
35. 35.🍞 Where is yeast used in the kitchen? (a) to wash dishes (b) to colour rice (c) to make bread rise (d) to clean floors
36. 36.🧺 Which of these is not needed for the turmeric test? (a) a comb (b) soap solution (c) turmeric powder (d) lemon juice
37. 37.True or false: a magnet is something yeast needs. (a) True (b) False
38. 38.🍞 Which of these is something yeast does not need? (a) time (b) sugar (c) salt (d) warm water
39. 39.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is what we measure. (a) True (b) False
40. 40.🧺 Do we need an empty bottle for the fizzy balloon? (a) not needed (b) needed

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