Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 37 · 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.True or false: cotton or cloth is needed for the muddy water filter. (a) True (b) False
2. 2.🛟 Why should you never drink water just because it looks clear? (a) clear water is salty (b) germs are invisible (c) clear water is hot (d) clear water is sweet
3. 3.True or false: soil is needed for a seed to sprout. (a) True (b) False
4. 4.🔮 Predict: seeds on wet cotton are kept in a dark cupboard. Will they sprout? (a) yes, they sprout (b) they melt (c) no, never (d) they turn to stones
5. 5.True or false: reading the message is a job for an adult. (a) False (b) True
6. 6.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) the balloon is bigger (b) it shrinks to nothing (c) it turns to bread (d) the balloon is smaller
7. 7.True or false: plain water is an acid. (a) True (b) False
8. 8.True or false: salt water is neutral. (a) False (b) True
9. 9.🧺 Which of these is needed for the secret lemon message? (a) lemon juice (b) yeast (c) a balloon (d) a magnet
10. 10.True or false: lemon juice is a base. (a) True (b) False
11. 11.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) a small bowl (b) moong seeds (c) a few days (d) yeast
12. 12.🌱 Is warmth needed for a seed to sprout? (a) needed to sprout (b) not needed to sprout
13. 13.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) yeast (b) cold water to rinse (c) fresh cream (d) a jar with a tight lid
14. 14.🔍 Which is the odd one out? (a) time (b) sugar (c) warm water (d) sunlight
15. 15.🛟 The water for the yeast should be ___. (a) warm, not hot (b) very salty (c) boiling hot (d) ice cold
16. 16.📘 What do we call a seed starting to grow? (a) pollination (b) germination (c) condensation (d) evaporation
17. 17.🧺 Which of these is not needed for the secret lemon message? (a) lemon juice (b) a cotton bud (c) an adult with an iron (d) a battery cell
18. 18.True or false: a clean glass is not needed for the muddy water filter. (a) True (b) False
19. 19.🔍 Which is the odd one out? (a) plain water (b) baking soda water (c) detergent water (d) soap solution
20. 20.True or false: glucose powder dissolves in water. (a) False (b) True
21. 21.🔮 Predict: sprouts grow in the dark for a week. What colour are their leaves? (a) dark green (b) bright red (c) pale yellow (d) blue
22. 22.🧺 Do we need a spoon for growing salt crystals? (a) not needed (b) needed
23. 23.🔍 Which is the odd one out? (a) warm water (b) sugar (c) time (d) salt
24. 24.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the same muddy water is the one thing we change. (a) False (b) True
25. 25.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the turmeric paper (b) the light we look in (c) the colour we see (d) the liquid we test
26. 26.🧈 Which of these is a change that cannot be undone? (a) milk turning to curd (b) melting butter (c) dissolving salt (d) freezing water
27. 27.🫗 Which of these is done by winnowing? (a) husk from rice grain (b) mud from water (c) gravel from fine sand (d) tea leaves from tea
28. 28.🧺 Do we need a balloon for the fizzy balloon? (a) not needed (b) needed
29. 29.🧺 Which of these is needed for the secret lemon message? (a) a mirror (b) a cotton bud (c) a balloon (d) a battery cell
30. 30.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) sugar (c) a paper clip (d) a small bottle
31. 31.🪴 Which part of a plant does this job: hold up the leaves? (a) stem (b) flower (c) leaves (d) roots
32. 32.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it fizzes (b) crystals grow faster (c) few or no crystals (d) it turns sweet
33. 33.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows very little (b) it turns yellow (c) it bursts at once (d) it grows much faster
34. 34.🌱 Which of these sprouts in a few days? (a) seeds on wet cotton (b) seeds in the freezer (c) seeds on dry cotton (d) boiled seeds
35. 35.🧺 Do we need water for the turmeric test? (a) not needed (b) needed
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.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “amount of water drops”? (a) we change it (b) we measure it (c) we keep it the same
38. 38.🧂 Which of these dissolves in water? (a) sand (b) food colour (c) small pebbles (d) chalk powder
39. 39.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) sunlight (b) a rubber band (c) a clear plastic bag (d) vinegar
40. 40.🧺 Do we need a seed for the fizzy balloon? (a) not needed (b) needed

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