Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 644 · 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 is the odd one out? (a) letting the paper dry (b) dipping the cotton bud (c) writing the message (d) cutting the lemon
2. 2.🔍 Which is the odd one out? (a) dissolving salt (b) cooking an egg (c) folding paper (d) melting ice
3. 3.🔍 Which is the odd one out? (a) detergent water (b) tamarind water (c) baking soda water (d) soap solution
4. 4.True or false: a mirror is needed for the yeast balloon. (a) False (b) True
5. 5.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) a magnet (c) a balloon (d) warm water
6. 6.🍋 Which of these steps is a job for an adult? (a) letting the paper dry (b) reading the message (c) ironing the paper (d) writing the message
7. 7.🛟 What should you do after touching soil or seeds? (a) rub your eyes (b) skip washing (c) wash your hands (d) lick your fingers
8. 8.True or false: a magnet is something yeast needs. (a) True (b) False
9. 9.True or false: browning lemon ink is a change that can be undone. (a) False (b) True
10. 10.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a few hours (b) a clear plastic bag (c) a rubber band (d) turmeric powder
11. 11.True or false: sand dissolves in water. (a) False (b) True
12. 12.⚖️ 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 what we measure. (a) True (b) False
13. 13.🧺 Which of these is needed for the fizzy balloon? (a) vinegar (b) a seed (c) a magnet (d) sugar
14. 14.True or false: sugar is not needed for a seed to sprout. (a) False (b) True
15. 15.🧺 Do we need a clean glass for the muddy water filter? (a) needed (b) not needed
16. 16.⚖️ 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) the water temperature (c) size of the balloon
17. 17.🧺 Which of these is not needed for the turmeric test? (a) water (b) white paper strips (c) turmeric powder (d) a battery cell
18. 18.🧺 Which of these is needed for growing salt crystals? (a) warm water (b) yeast (c) a magnet (d) a mirror
19. 19.🟡 Which of these turns turmeric reddish-brown? (a) plain water (b) tamarind water (c) lemon juice (d) soap solution
20. 20.🌱 Will these sprout: seeds on wet cotton? (a) does not sprout (b) sprouts
21. 21.🧺 Which of these is needed for the leafy bag test? (a) turmeric powder (b) a potted plant (c) vinegar (d) a mirror
22. 22.True or false: a funnel or spoon is not needed for the fizzy balloon. (a) True (b) False
23. 23.⚖️ 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 time we wait
24. 24.🧺 Which of these is not needed for the turmeric test? (a) a magnet (b) lemon juice (c) turmeric powder (d) white paper strips
25. 25.True or false: freezing water is a change that cannot be undone. (a) True (b) False
26. 26.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) a balloon (c) a magnet (d) dry yeast
27. 27.🔍 Which is the odd one out? (a) salt (b) vinegar (c) sunlight (d) time
28. 28.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny stars (b) tiny cubes (c) tiny triangles (d) tiny spheres
29. 29.🫗 Which of these is done by handpicking? (a) chaff from wheat grain (b) salt from sea water (c) small stones from dal (d) gravel from fine sand
30. 30.🔮 Predict: you pour muddy water through two layers of cloth instead of one. The water comes out ___. (a) salty (b) hot (c) muddier (d) clearer
31. 31.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) salt (c) a battery cell (d) a piece of string
32. 32.📘 What is yeast? (a) a kind of salt (b) a kind of stone (c) a tiny living fungus (d) a kind of sugar
33. 33.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a small bottle (c) sugar (d) a paper clip
34. 34.🔮 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
35. 35.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it turns to bread (b) the balloon is smaller (c) the balloon is bigger (d) it shrinks to nothing
36. 36.True or false: orange juice is a base. (a) False (b) True
37. 37.🧺 Do we need a rubber band for the leafy bag test? (a) not needed (b) needed
38. 38.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a small bowl (b) white paper (c) yeast (d) a cotton bud
39. 39.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to oil (b) it turns to butter (c) sugar crystals form (d) salt crystals form
40. 40.🌱 Where does a sprouting seed get its first food from? (a) the air (b) the cotton wool (c) the sunlight only (d) food stored in the seed

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