Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 387 · 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 of these is needed for the turmeric test? (a) a magnet (b) a battery cell (c) a dropper or spoon (d) a balloon
2. 2.🧂 Does small pebbles dissolve in water? (a) dissolves in water (b) does not dissolve
3. 3.🧺 Which of these is not needed for the turmeric test? (a) a dropper or spoon (b) water (c) a balloon (d) soap solution
4. 4.True or false: a comb is needed for the fizzy balloon. (a) True (b) False
5. 5.🛟 Turmeric stains clothes. What should you wear? (a) your best clothes (b) an old shirt or apron (c) a white party dress (d) your school uniform
6. 6.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) white paper (b) lemon juice (c) a small bowl (d) a balloon
7. 7.True or false: cutting the lemon is a job a child can do. (a) False (b) True
8. 8.🧺 Do we need white paper strips for the turmeric test? (a) needed (b) not needed
9. 9.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is kept the same. (a) True (b) False
10. 10.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the same bottles”? (a) we change it (b) we measure it (c) we keep it the same
11. 11.⚖️ 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) sunny or shady place (c) days to see crystals (d) the amount of salt
12. 12.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a tray for spills (b) vinegar (c) a magnet (d) a balloon
13. 13.🧺 Which of these is not needed for the secret lemon message? (a) an adult with an iron (b) a magnet (c) white paper (d) lemon juice
14. 14.🛟 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
15. 15.🛟 Why must children keep their fingers away from the iron? (a) it is cold (b) it is sticky (c) it is magnetic (d) it can burn skin
16. 16.🛟 Some seeds from shops are coated with chemicals. What is the safe rule? (a) eat a few to check (b) feed them to pets (c) never put seeds in mouth (d) throw them at friends
17. 17.🧺 Which of these is not needed for making butter? (a) a jar with a tight lid (b) a magnet (c) cold water to rinse (d) fresh cream
18. 18.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: size of the balloon is what we measure. (a) True (b) False
19. 19.🔮 Predict: the adult irons for only one second. What happens? (a) the paper floats (b) writing turns green (c) writing stays faint (d) it gets darker
20. 20.True or false: a piece of string is not needed for growing salt crystals. (a) True (b) False
21. 21.🪴 Which part of a plant does this job: make food in sunlight? (a) stem (b) flower (c) roots (d) leaves
22. 22.True or false: sugar is not needed for a seed to sprout. (a) True (b) False
23. 23.🛟 Why should you never drink water just because it looks clear? (a) clear water is hot (b) clear water is sweet (c) clear water is salty (d) germs are invisible
24. 24.🧺 Which of these is needed for the yeast balloon? (a) a balloon (b) turmeric powder (c) a paper clip (d) a magnet
25. 25.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: how dark the writing is is kept the same. (a) False (b) True
26. 26.True or false: hold the plant in soil is a job of the leaves. (a) True (b) False
27. 27.🪴 Where did the water inside the bag come from? (a) the rain (b) the leaves (c) the plastic (d) the rubber band
28. 28.📘 What do we call a seed starting to grow? (a) evaporation (b) condensation (c) germination (d) pollination
29. 29.True or false: soap solution keeps turmeric yellow. (a) True (b) False
30. 30.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) baking soda (b) a comb (c) a funnel or spoon (d) vinegar
31. 31.🛟 How should the plastic bag be tied around the branch? (a) gently, not too tight (b) with sharp wire (c) as tight as possible (d) with a hot glue gun
32. 32.⚖️ Fair test — do seeds need water to sprout? What do we do with “wet or dry cotton”? (a) we keep it the same (b) we change it (c) we measure it
33. 33.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns black (b) it turns blue (c) it turns red (d) it stays yellow
34. 34.🍋 Which of these steps is a job for an adult? (a) writing the message (b) ironing the paper (c) dipping the cotton bud (d) reading the message
35. 35.🟡 Why does soap solution change turmeric’s colour? (a) soap is hot (b) soap is an acid (c) soap water is a base (d) soap is magnetic
36. 36.🍞 Does yeast need sugar to make gas? (a) yeast does not need it (b) yeast needs it
37. 37.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) an adult with an iron (b) a mirror (c) white paper (d) lemon juice
38. 38.True or false: plain water keeps turmeric yellow. (a) False (b) True
39. 39.🔍 Which is the odd one out? (a) soap solution (b) vinegar (c) tamarind water (d) plain water
40. 40.🫧 Which of these is neutral? (a) vinegar (b) baking soda water (c) sugar water (d) orange juice

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