Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 748 · 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.🌱 Is warmth needed for a seed to sprout? (a) needed to sprout (b) not needed to sprout
2. 2.True or false: take in water from soil is a job of the leaves. (a) False (b) True
3. 3.True or false: water is needed for the turmeric test. (a) False (b) True
4. 4.⚖️ Fair test — do seeds need water to sprout? Which of these is what we measure? (a) how many seeds sprout (b) wet or dry cotton (c) the number of seeds (d) the kind of seeds
5. 5.🔍 Which is the odd one out? (a) reading the message (b) ironing the paper (c) plugging in the iron (d) putting the iron away
6. 6.🛟 Why should you never drink water just because it looks clear? (a) clear water is hot (b) germs are invisible (c) clear water is salty (d) clear water is sweet
7. 7.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the same glass is what we measure. (a) True (b) False
8. 8.🧺 Do we need a mirror for the fizzy balloon? (a) not needed (b) needed
9. 9.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is what we measure. (a) True (b) False
10. 10.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) turmeric powder (c) a magnet (d) sugar
11. 11.⚖️ 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
12. 12.🫗 Which of these is done by handpicking? (a) bad grains from rice (b) salt from sea water (c) sugar from sugar water (d) gravel from fine sand
13. 13.True or false: salt is not needed for growing salt crystals. (a) False (b) True
14. 14.⚖️ Fair test — do seeds need water to sprout? What do we do with “wet or dry cotton”? (a) we change it (b) we keep it the same (c) we measure it
15. 15.True or false: a comb is needed for the turmeric test. (a) True (b) False
16. 16.🔍 Which is the odd one out? (a) freezing water (b) cooking an egg (c) browning lemon ink (d) rusting iron
17. 17.True or false: vinegar turns turmeric reddish-brown. (a) False (b) True
18. 18.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) green (b) reddish (c) white at once (d) bright blue
19. 19.🧺 Do we need a battery cell for making butter? (a) not needed (b) needed
20. 20.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) rusting iron (c) melting butter (d) baking a cake
21. 21.🌱 Why do the seeds on dry cotton not sprout? (a) they are too wet (b) they have no soil (c) they have no salt (d) they have no water
22. 22.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) a friend who is running (c) a grown-up (d) the youngest child
23. 23.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is the one thing we change? (a) how dark the writing is (b) the same cotton bud (c) the kind of juice (d) the same paper
24. 24.🧺 Which of these is not needed for the leafy bag test? (a) a clear plastic bag (b) sunlight (c) a battery cell (d) a potted plant
25. 25.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: the amount of vinegar is what we measure. (a) False (b) True
26. 26.🧺 Do we need a mirror for the turmeric test? (a) not needed (b) needed
27. 27.🫗 Why does filtered muddy water look clearer? (a) the filter adds soap (b) the mud dissolves (c) the water evaporates (d) the filter traps mud
28. 28.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the iron setting”? (a) we change it (b) we keep it the same (c) we measure it
29. 29.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) dry yeast (c) a mirror (d) sugar
30. 30.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is what we measure? (a) the same bottle (b) the kind of balloon (c) the amount of vinegar (d) size of the balloon
31. 31.🍞 Which of these is something yeast does not need? (a) time (b) sugar (c) sunlight (d) warm water
32. 32.True or false: detergent water is neutral. (a) True (b) False
33. 33.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we keep it the same (b) we change it (c) we measure it
34. 34.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a small bowl (b) lemon juice (c) a cotton bud (d) turmeric powder
35. 35.🔍 Which is the odd one out? (a) warmth (b) air (c) water (d) soil
36. 36.🧈 Can this change be undone: melting ice? (a) can be undone (b) cannot be undone
37. 37.🫧 What do you see when baking soda meets vinegar? (a) lots of fizzy bubbles (b) it glows in the dark (c) it turns to ice (d) nothing at all
38. 38.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) cotton or cloth (b) a clean glass (c) a magnet (d) muddy water
39. 39.🧂 Why do we stir in salt until no more will dissolve? (a) to make it fizz (b) to change its colour (c) to cool the water (d) to make it very salty
40. 40.⚖️ 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 salt (b) days to see crystals (c) the same dish (d) the kind of salt

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