Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 925 · 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 cloth filter or a cotton filter give clearer water? Which of these is kept the same? (a) how clear the water is (b) the same muddy water (c) the filter material
2. 2.⚖️ 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 measure it (c) we change it
3. 3.True or false: sugar is not needed for the fizzy balloon. (a) True (b) False
4. 4.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a seed (b) a funnel or spoon (c) vinegar (d) an empty bottle
5. 5.True or false: cotton wool is not needed for sprouting seeds. (a) False (b) True
6. 6.🫗 How do we separate mud from water? (a) winnowing (b) filtering (c) sieving (d) evaporating
7. 7.🟡 Turmeric paper meets lemon juice. What happens? (a) turns reddish-brown (b) stays yellow
8. 8.🧺 Do we need yeast for the turmeric test? (a) not needed (b) needed
9. 9.True or false: seeds on wet cotton sprouts in a few days. (a) True (b) False
10. 10.🟡 Turmeric paper meets salt water. What happens? (a) stays yellow (b) turns reddish-brown
11. 11.🫧 Which of these is an acid? (a) salt water (b) sugar water (c) lemon juice (d) baking soda water
12. 12.🔍 What do you see after shaking cream in a jar for a long time? (a) bubbles of gas (b) sugar crystals (c) clear water only (d) lumps of butter
13. 13.🧺 Which of these is needed for the muddy water filter? (a) a battery cell (b) turmeric powder (c) sand and pebbles (d) a balloon
14. 14.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) the amount of yeast (b) size of the balloon (c) the water temperature
15. 15.🛟 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
16. 16.🔮 Predict: seeds on wet cotton are kept in the freezer. What happens? (a) they grow fruit (b) they do not sprout (c) they glow (d) they sprout faster
17. 17.🍞 Does yeast need sugar to make gas? (a) yeast does not need it (b) yeast needs it
18. 18.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) dry yeast (c) a small bottle (d) a mirror
19. 19.🧺 Which of these is needed for the fizzy balloon? (a) a mirror (b) a balloon (c) sugar (d) a magnet
20. 20.🧺 Do we need a small bottle for the yeast balloon? (a) not needed (b) needed
21. 21.🪴 Which part of a plant does this job: give out water vapour? (a) stem (b) leaves (c) flower (d) roots
22. 22.🟡 Which of these keeps turmeric yellow? (a) baking soda water (b) soap solution (c) vinegar (d) detergent water
23. 23.🔍 What do you see inside the plastic bag after a few hours in the sun? (a) nothing at all (b) salt crystals (c) tiny water drops (d) tiny insects
24. 24.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a balloon (b) a dropper or spoon (c) turmeric powder (d) soap solution
25. 25.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: spoons of baking soda is the one thing we change. (a) True (b) False
26. 26.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is kept the same? (a) how dark the writing is (b) the ironing time (c) the kind of juice
27. 27.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is the one thing we change. (a) False (b) True
28. 28.🫧 Which gas fills the balloon in the baking soda and vinegar experiment? (a) hydrogen (b) helium (c) carbon dioxide (d) oxygen
29. 29.🟡 Which of these turns turmeric reddish-brown? (a) soap solution (b) sugar water (c) lemon juice (d) plain water
30. 30.🫧 Is plain water an acid, a base or neutral? (a) a base (b) neutral (c) an acid
31. 31.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: the size of the plant is kept the same. (a) True (b) False
32. 32.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it turns to sugar (b) it glows (c) the yeast is killed (d) it grows faster
33. 33.True or false: take in water from soil is a job of the roots. (a) False (b) True
34. 34.🍋 Why does the lemon writing turn brown with heat? (a) heat adds colour (b) the iron is brown (c) the juice scorches first (d) paper turns lemony
35. 35.True or false: water is not needed for a seed to sprout. (a) True (b) False
36. 36.🛟 Which safety rule fits the fizzy balloon experiment? (a) shake it near your face (b) seal it in a glass jar (c) put it in your mouth (d) keep it away from eyes
37. 37.🧺 Do we need sunlight for the leafy bag test? (a) needed (b) not needed
38. 38.🛟 What should you do if vinegar splashes in your eye? (a) ignore it (b) add baking soda (c) rub it hard (d) rinse with clean water
39. 39.True or false: warm water is needed for growing salt crystals. (a) True (b) False
40. 40.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it turns yellow (b) it grows much faster (c) it grows very little (d) it bursts at once

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