Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 166 · 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.🫧 Which gas fills the balloon in the baking soda and vinegar experiment? (a) helium (b) hydrogen (c) carbon dioxide (d) oxygen
2. 2.🔮 Predict: you write with plain water instead of lemon juice. What appears after ironing? (a) blue words (b) dark brown words (c) almost nothing (d) a rainbow
3. 3.🛟 After the yeast experiment, what should you do with the mixture? (a) put it in your mouth (b) throw it at a wall (c) keep it for a month (d) pour it down the sink
4. 4.🧺 Do we need a balloon for the turmeric test? (a) needed (b) not needed
5. 5.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the same bottle”? (a) we keep it the same (b) we change it (c) we measure it
6. 6.🔍 What do you see inside the plastic bag after a few hours in the sun? (a) salt crystals (b) nothing at all (c) tiny water drops (d) tiny insects
7. 7.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) sunny or shady place (b) days to see crystals (c) the kind of salt
8. 8.🛟 Which safety rule fits the fizzy balloon experiment? (a) seal it in a glass jar (b) put it in your mouth (c) shake it near your face (d) keep it away from eyes
9. 9.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: sun or shade is kept the same. (a) False (b) True
10. 10.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) reddish (b) green (c) bright blue (d) white at once
11. 11.True or false: melting ice is a change that cannot be undone. (a) False (b) True
12. 12.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) a comb (c) sugar (d) warm water
13. 13.🔍 Which is the odd one out? (a) sunlight (b) water (c) air (d) warmth
14. 14.True or false: baking soda dissolves in water. (a) False (b) True
15. 15.🧺 Do we need a funnel for the muddy water filter? (a) needed (b) not needed
16. 16.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the ironing time is what we measure. (a) True (b) False
17. 17.🧂 Does glucose powder dissolve in water? (a) dissolves in water (b) does not dissolve
18. 18.🟡 Turmeric paper meets soap solution. What happens? (a) turns reddish-brown (b) stays yellow
19. 19.True or false: a shallow dish is not needed for growing salt crystals. (a) True (b) False
20. 20.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the same cotton bud is kept the same. (a) True (b) False
21. 21.⚖️ 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) False (b) True
22. 22.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) a small bowl (b) a few days (c) yeast (d) water
23. 23.🧈 Why does shaking cream make butter? (a) the lid is warm (b) fat bits stick together (c) shaking adds salt (d) the jar adds butter
24. 24.True or false: a balloon is needed for the secret lemon message. (a) False (b) True
25. 25.🪴 Which part of a plant does this job: hold up the leaves? (a) leaves (b) flower (c) stem (d) roots
26. 26.True or false: moong seeds is not needed for sprouting seeds. (a) False (b) True
27. 27.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) a funnel (b) muddy water (c) cotton or cloth (d) a battery cell
28. 28.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) a few days (b) a magnet (c) water (d) moong seeds
29. 29.🧺 Do we need warm water for the yeast balloon? (a) not needed (b) needed
30. 30.True or false: make seeds is a job of the flower. (a) False (b) True
31. 31.🧺 Which of these is not needed for the secret lemon message? (a) a small bowl (b) lemon juice (c) a magnet (d) white paper
32. 32.🧺 Which of these is needed for the fizzy balloon? (a) an empty bottle (b) a comb (c) a mirror (d) a seed
33. 33.⚖️ Fair test — do seeds need water to sprout? True or false: the number of seeds is kept the same. (a) False (b) True
34. 34.🛟 The water for the yeast should be ___. (a) warm, not hot (b) ice cold (c) boiling hot (d) very salty
35. 35.🧺 Which of these is needed for the muddy water filter? (a) sand and pebbles (b) yeast (c) a balloon (d) a magnet
36. 36.🪴 Which of these is a job of the roots? (a) hold up the leaves (b) make food in sunlight (c) hold the plant in soil (d) make seeds
37. 37.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) sunlight (b) vinegar (c) a potted plant (d) a rubber band
38. 38.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is the one thing we change? (a) the amount of water (b) the kind of salt (c) the amount of salt (d) sunny or shady place
39. 39.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we change it (b) we measure it (c) we keep it the same
40. 40.🔮 The fizzing stops after a while. Why? (a) the gas froze (b) the bottle got tired (c) the balloon got cold (d) an ingredient ran out

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