Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 552 · 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.🧺 Do we need an adult with an iron for the secret lemon message? (a) not needed (b) needed
2. 2.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
3. 3.🧈 Which of these is a change that cannot be undone? (a) cooking an egg (b) melting butter (c) melting ice (d) folding paper
4. 4.True or false: a mirror is needed for the leafy bag test. (a) True (b) False
5. 5.🛟 Why must children keep their fingers away from the iron? (a) it is magnetic (b) it is cold (c) it can burn skin (d) it is sticky
6. 6.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we change it (b) we keep it the same (c) we measure it
7. 7.🔍 Which is the odd one out? (a) baking soda water (b) detergent water (c) vinegar (d) soap solution
8. 8.🌱 Will these sprout: seeds on dry cotton? (a) does not sprout (b) sprouts
9. 9.🔍 Which is the odd one out? (a) sunlight (b) time (c) warm water (d) sugar
10. 10.🧺 Which of these is needed for sprouting seeds? (a) cotton wool (b) a balloon (c) a mirror (d) yeast
11. 11.🛟 Who should use the hot iron in the secret message experiment? (a) whoever is fastest (b) any child (c) the youngest child (d) only an adult
12. 12.🧺 Do we need a balloon for the muddy water filter? (a) not needed (b) needed
13. 13.🧈 What is the watery liquid left after the butter forms? (a) vinegar (b) oil (c) honey (d) buttermilk
14. 14.🔮 Predict: you write with plain water instead of lemon juice. What appears after ironing? (a) dark brown words (b) blue words (c) almost nothing (d) a rainbow
15. 15.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny stars (b) tiny cubes (c) tiny triangles (d) tiny spheres
16. 16.🛟 Why is a plastic jar a good choice for shaking? (a) it is magnetic (b) it will not break (c) it is heavier (d) it is hotter
17. 17.True or false: baking a cake is a change that cannot be undone. (a) True (b) False
18. 18.🔮 The fizzing stops after a while. Why? (a) the bottle got tired (b) an ingredient ran out (c) the gas froze (d) the balloon got cold
19. 19.🔍 Which is the odd one out? (a) soap solution (b) baking soda water (c) salt water (d) detergent water
20. 20.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) sand and pebbles (b) cotton or cloth (c) a battery cell (d) a clean glass
21. 21.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) a mirror (c) a shallow dish (d) a magnet
22. 22.🧺 Do we need cold water to rinse for making butter? (a) needed (b) not needed
23. 23.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “spoons of baking soda”? (a) we measure it (b) we change it (c) we keep it the same
24. 24.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) liquid crystals (c) bigger crystals (d) no crystals
25. 25.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a magnet (b) baking soda (c) a balloon (d) a tray for spills
26. 26.🧺 Which of these is needed for sprouting seeds? (a) a magnet (b) moong seeds (c) turmeric powder (d) a balloon
27. 27.🛟 What should you do if vinegar splashes in your eye? (a) ignore it (b) add baking soda (c) rub it hard (d) rinse with clean water
28. 28.True or false: cotton or cloth is not needed for the muddy water filter. (a) True (b) False
29. 29.🍋 Which of these steps is a job a child can do? (a) ironing the paper (b) plugging in the iron (c) writing the message (d) cutting the lemon
30. 30.True or false: yeast is needed for the turmeric test. (a) False (b) True
31. 31.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a small bowl (b) an adult with an iron (c) a cotton bud (d) a battery cell
32. 32.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) melting butter (c) browning lemon ink (d) folding paper
33. 33.🔮 Predict: a plant gets no water for many days in summer. What happens? (a) it turns blue (b) it grows faster (c) it wilts and droops (d) it flowers more
34. 34.⚖️ Fair test — do seeds need water to sprout? Which of these is kept the same? (a) the kind of seeds (b) how many seeds sprout (c) wet or dry cotton
35. 35.True or false: a spoon is not needed for growing salt crystals. (a) False (b) True
36. 36.🍞 Which of these is something yeast needs? (a) warm water (b) a magnet (c) salt (d) vinegar
37. 37.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed
38. 38.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) green (b) bright blue (c) reddish (d) white at once
39. 39.🧈 Can this change be undone: melting ice? (a) cannot be undone (b) can be undone
40. 40.True or false: salt water keeps turmeric yellow. (a) True (b) False

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