Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 97 · 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.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: the time we wait is the one thing we change. (a) False (b) True
2. 2.🛟 Some seeds from shops are coated with chemicals. What is the safe rule? (a) throw them at friends (b) never put seeds in mouth (c) feed them to pets (d) eat a few to check
3. 3.🧺 Which of these is needed for the secret lemon message? (a) a battery cell (b) turmeric powder (c) a balloon (d) a cotton bud
4. 4.🧺 Which of these is needed for the turmeric test? (a) a mirror (b) a balloon (c) yeast (d) lemon juice
5. 5.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the colour we see (b) the turmeric paper (c) the liquid we test
6. 6.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “size of the balloon”? (a) we change it (b) we measure it (c) we keep it the same
7. 7.🍋 Why does the lemon writing turn brown with heat? (a) paper turns lemony (b) the iron is brown (c) heat adds colour (d) the juice scorches first
8. 8.🍋 Secret message: who does this step — plugging in the iron? (a) a child can do it (b) an adult does it
9. 9.🌱 Which of these does not sprout? (a) seeds on wet cotton (b) wet seeds in the dark (c) wet seeds by a window (d) boiled seeds
10. 10.🔍 Which is the odd one out? (a) plain water (b) baking soda water (c) detergent water (d) soap solution
11. 11.🧺 Do we need yeast for the secret lemon message? (a) needed (b) not needed
12. 12.🛟 Which safety rule fits the fizzy balloon experiment? (a) seal it in a glass jar (b) keep it away from eyes (c) shake it near your face (d) put it in your mouth
13. 13.🧺 Do we need cotton or cloth for the muddy water filter? (a) not needed (b) needed
14. 14.🫧 Is orange juice an acid, a base or neutral? (a) a base (b) neutral (c) an acid
15. 15.True or false: putting the iron away is a job a child can do. (a) False (b) True
16. 16.🌱 Which of these is needed for a seed to sprout? (a) sugar (b) soil (c) sunlight (d) water
17. 17.🧺 Do we need yeast for the muddy water filter? (a) not needed (b) needed
18. 18.🫧 Is plain water an acid, a base or neutral? (a) an acid (b) neutral (c) a base
19. 19.🧺 Which of these is not needed for making butter? (a) a timer (b) a jar with a tight lid (c) yeast (d) cold water to rinse
20. 20.True or false: soap solution keeps turmeric yellow. (a) True (b) False
21. 21.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a battery cell (c) a balloon (d) dry yeast
22. 22.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) a magnet (c) water (d) white paper strips
23. 23.🧺 Do we need a small bowl for the secret lemon message? (a) needed (b) not needed
24. 24.🧈 Which of these is a change that can be undone? (a) baking a cake (b) rusting iron (c) freezing water (d) cooking an egg
25. 25.🧺 Do we need a clear plastic bag for the leafy bag test? (a) needed (b) not needed
26. 26.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a piece of string (c) a battery cell (d) salt
27. 27.True or false: lemon juice is an acid. (a) False (b) True
28. 28.⚖️ 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 same kind of bag (b) the size of the plant (c) sun or shade (d) the kind of plant
29. 29.True or false: a seed is not needed for the fizzy balloon. (a) True (b) False
30. 30.🪴 Which of these is a job of the roots? (a) hold the plant in soil (b) make food in sunlight (c) hold up the leaves (d) make seeds
31. 31.🔍 Which is the odd one out? (a) cooking oil (b) sawdust (c) table salt (d) small pebbles
32. 32.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) bright blue (b) reddish-brown (c) it stays white (d) green
33. 33.🍋 Why can’t you see the lemon writing once it dries? (a) the paper ate it (b) it turned into air (c) dry juice is see-through (d) the ink is magnetic
34. 34.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: the amount of vinegar is the one thing we change. (a) False (b) True
35. 35.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) cotton wool (b) a small bowl (c) water (d) yeast
36. 36.🔮 Predict: you filter salty water through cloth. Does the salt stay on the cloth? (a) it turns to sugar (b) it turns to sand (c) yes, all of it (d) no, salt passes through
37. 37.🧺 Do we need vinegar for the leafy bag test? (a) needed (b) not needed
38. 38.🔮 Predict: a plant gets no water for many days in summer. What happens? (a) it grows faster (b) it turns blue (c) it wilts and droops (d) it flowers more
39. 39.True or false: a mirror is needed for making butter. (a) False (b) True
40. 40.📘 What is yeast? (a) a kind of sugar (b) a kind of stone (c) a tiny living fungus (d) a kind of salt

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