Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 332 · 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.🛟 What should you do after handling muddy water? (a) wipe hands on face (b) nothing is needed (c) wash hands afterwards (d) lick your fingers
2. 2.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) water (c) a battery cell (d) lemon juice
3. 3.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) turmeric powder (b) an adult with an iron (c) a cotton bud (d) lemon juice
4. 4.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is the one thing we change? (a) the iron setting (b) the kind of juice (c) the ironing time (d) how dark the writing is
5. 5.🔍 Which is the odd one out? (a) sugar water (b) salt water (c) baking soda water (d) plain water
6. 6.⚖️ Fair test — do seeds need water to sprout? What do we do with “the number of seeds”? (a) we change it (b) we measure it (c) we keep it the same
7. 7.True or false: folding paper is a change that cannot be undone. (a) True (b) False
8. 8.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is the one thing we change? (a) spoons of baking soda (b) the same bottle (c) the kind of balloon (d) the amount of vinegar
9. 9.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: size of the balloon is the one thing we change. (a) False (b) True
10. 10.🔮 Predict: seeds on wet cotton are kept in a dark cupboard. Will they sprout? (a) they turn to stones (b) yes, they sprout (c) they melt (d) no, never
11. 11.🪴 Which part of a plant does this job: make seeds? (a) flower (b) stem (c) roots (d) leaves
12. 12.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is what we measure. (a) False (b) True
13. 13.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the amount of sugar”? (a) we measure it (b) we keep it the same (c) we change it
14. 14.🧺 Do we need cotton wool for sprouting seeds? (a) needed (b) not needed
15. 15.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the amount of water”? (a) we measure it (b) we keep it the same (c) we change it
16. 16.True or false: seeds in the freezer does not sprout. (a) False (b) True
17. 17.🧂 Which of these dissolves in water? (a) sand (b) cooking oil (c) food colour (d) small pebbles
18. 18.🍋 Secret message: who does this step — dipping the cotton bud? (a) an adult does it (b) a child can do it
19. 19.True or false: cotton wool is not needed for sprouting seeds. (a) True (b) False
20. 20.🌱 Will these sprout: boiled seeds? (a) does not sprout (b) sprouts
21. 21.True or false: vinegar is not needed for the leafy bag test. (a) True (b) False
22. 22.🧂 Does chalk powder dissolve in water? (a) dissolves in water (b) does not dissolve
23. 23.🧺 Which of these is needed for the yeast balloon? (a) a paper clip (b) a comb (c) a mirror (d) a balloon
24. 24.True or false: table salt does not dissolve in water. (a) False (b) True
25. 25.⚖️ Fair test — do seeds need water to sprout? Which of these is kept the same? (a) the number of seeds (b) how many seeds sprout (c) wet or dry cotton
26. 26.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a jar with a tight lid (b) a battery cell (c) fresh cream (d) a timer
27. 27.🔮 Predict: which gives more drops in the bag — a hot sunny day or a cool cloudy day? (a) the hot sunny day (b) the cool cloudy day (c) both the same (d) neither of them
28. 28.🍋 Which of these steps is a job a child can do? (a) ironing the paper (b) writing the message (c) plugging in the iron (d) putting the iron away
29. 29.🧺 Which of these is not needed for the muddy water filter? (a) a battery cell (b) sand and pebbles (c) a clean glass (d) a funnel
30. 30.🧺 Do we need a magnet for the fizzy balloon? (a) not needed (b) needed
31. 31.True or false: vinegar is not needed for the fizzy balloon. (a) True (b) False
32. 32.🧺 Do we need a battery cell for the fizzy balloon? (a) needed (b) not needed
33. 33.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) folding paper (c) browning lemon ink (d) melting ice
34. 34.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) a small bottle (c) turmeric powder (d) dry yeast
35. 35.🛟 Some seeds from shops are coated with chemicals. What is the safe rule? (a) never put seeds in mouth (b) throw them at friends (c) eat a few to check (d) feed them to pets
36. 36.🧺 Do we need a few hours for the leafy bag test? (a) not needed (b) needed
37. 37.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a seed (b) baking soda (c) a tray for spills (d) vinegar
38. 38.True or false: yeast is not needed for the muddy water filter. (a) False (b) True
39. 39.🧺 Do we need a funnel for the muddy water filter? (a) needed (b) not needed
40. 40.🛟 The water for the yeast should be ___. (a) boiling hot (b) ice cold (c) very salty (d) warm, not hot

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