Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 751 · 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 part of a plant does this job: hold the plant in soil? (a) flower (b) stem (c) roots (d) leaves
2. 2.🔮 Predict: you filter salty water through cloth. Does the salt stay on the cloth? (a) it turns to sand (b) yes, all of it (c) no, salt passes through (d) it turns to sugar
3. 3.🔍 Which is the odd one out? (a) browning lemon ink (b) folding paper (c) cooking an egg (d) milk turning to curd
4. 4.🌱 Which of these sprouts in a few days? (a) boiled seeds (b) seeds in the freezer (c) seeds on wet cotton (d) seeds on dry cotton
5. 5.🫧 What do you see when baking soda meets vinegar? (a) it turns to ice (b) lots of fizzy bubbles (c) it glows in the dark (d) nothing at all
6. 6.🫧 Which of these is neutral? (a) salt water (b) curd (c) orange juice (d) lemon juice
7. 7.🧺 Do we need a balloon for the yeast balloon? (a) needed (b) not needed
8. 8.🍋 What colour does the lemon writing turn when an adult warms it? (a) green (b) brown (c) white (d) blue
9. 9.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: how hard we shake is the one thing we change. (a) False (b) True
10. 10.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a jar with a tight lid (b) a timer (c) fresh cream (d) yeast
11. 11.⚖️ 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 keep it the same (c) we change it
12. 12.🫧 Is vinegar an acid, a base or neutral? (a) neutral (b) a base (c) an acid
13. 13.🍋 Which of these steps is a job a child can do? (a) ironing the paper (b) putting the iron away (c) plugging in the iron (d) letting the paper dry
14. 14.True or false: salt is not needed for a seed to sprout. (a) True (b) False
15. 15.🪴 Which of these is a job of the roots? (a) make food in sunlight (b) hold up the leaves (c) make seeds (d) take in water from soil
16. 16.🔮 Predict: you tie a bag on a branch with no leaves. Will it collect much water? (a) much less water (b) it fills with soil (c) exactly the same (d) much more water
17. 17.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) in a busy doorway (c) safe from small children (d) next to the baby
18. 18.True or false: a mirror is not needed for the leafy bag test. (a) True (b) False
19. 19.True or false: baking a cake is a change that can be undone. (a) True (b) False
20. 20.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is the one thing we change? (a) the water temperature (b) the amount of water (c) the amount of sugar (d) the same bottles
21. 21.True or false: carry water upward is a job of the roots. (a) True (b) False
22. 22.🍋 Which of these steps is a job for an adult? (a) cutting the lemon (b) dipping the cotton bud (c) writing the message (d) letting the paper dry
23. 23.🟡 Which of these keeps turmeric yellow? (a) baking soda water (b) detergent water (c) soap solution (d) vinegar
24. 24.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is kept the same? (a) the same paper (b) the kind of juice (c) how dark the writing is
25. 25.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) white paper strips (b) a dropper or spoon (c) a battery cell (d) lemon juice
26. 26.🛟 Who should use the hot iron in the secret message experiment? (a) any child (b) whoever is fastest (c) the youngest child (d) only an adult
27. 27.🔮 Predict: a plant gets no water for many days in summer. What happens? (a) it flowers more (b) it grows faster (c) it turns blue (d) it wilts and droops
28. 28.🧺 Do we need a tray for spills for the fizzy balloon? (a) not needed (b) needed
29. 29.🪴 Which of these is a job of the flower? (a) give out water vapour (b) make food in sunlight (c) make seeds (d) take in water from soil
30. 30.🫧 Which of these is an acid? (a) lemon juice (b) plain water (c) sugar water (d) soap solution
31. 31.🧺 Which of these is not needed for sprouting seeds? (a) water (b) a few days (c) a magnet (d) cotton wool
32. 32.🟡 Which of these turns turmeric reddish-brown? (a) lemon juice (b) sugar water (c) salt water (d) soap solution
33. 33.🫧 Is lemon juice an acid, a base or neutral? (a) an acid (b) a base (c) neutral
34. 34.True or false: milk turning to curd is a change that can be undone. (a) False (b) True
35. 35.🔍 Which is the odd one out? (a) a magnet (b) time (c) vinegar (d) salt
36. 36.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) an empty bottle (b) baking soda (c) vinegar (d) a battery cell
37. 37.🍋 Why can’t you see the lemon writing once it dries? (a) it turned into air (b) the ink is magnetic (c) the paper ate it (d) dry juice is see-through
38. 38.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is the one thing we change? (a) how clear the water is (b) the filter material (c) the same muddy water (d) the same funnel
39. 39.⚖️ 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 keep it the same (c) we measure it
40. 40.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? Which of these is the one thing we change? (a) the size of the plant (b) the kind of plant (c) sun or shade (d) the time we wait

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