Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 308 · 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.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) turmeric powder (c) a magnet (d) white paper strips
2. 2.🧺 Which of these is not needed for the fizzy balloon? (a) a balloon (b) baking soda (c) a mirror (d) vinegar
3. 3.🌱 Is soil needed for a seed to sprout? (a) needed to sprout (b) not needed to sprout
4. 4.🛟 What should you do after touching soil or seeds? (a) lick your fingers (b) wash your hands (c) rub your eyes (d) skip washing
5. 5.🛟 The water for the yeast should be ___. (a) ice cold (b) boiling hot (c) very salty (d) warm, not hot
6. 6.🧺 Which of these is needed for the secret lemon message? (a) yeast (b) turmeric powder (c) a cotton bud (d) a magnet
7. 7.True or false: turmeric powder is not needed for the muddy water filter. (a) False (b) True
8. 8.🪴 Which of these is a job of the leaves? (a) make seeds (b) take in water from soil (c) carry water upward (d) make food in sunlight
9. 9.True or false: freezing water is a change that cannot be undone. (a) True (b) False
10. 10.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) yeast (b) a rubber band (c) a potted plant (d) a few hours
11. 11.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) nobody needs to (c) a friend who is running (d) a grown-up
12. 12.📘 Vinegar is an acid and baking soda is a base. What happens when they meet? (a) they become magnets (b) they react (c) they freeze (d) they float apart
13. 13.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a timer (b) a bowl (c) a balloon (d) fresh cream
14. 14.🧈 Can this change be undone: rusting iron? (a) cannot be undone (b) can be undone
15. 15.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the iron setting is kept the same. (a) True (b) False
16. 16.True or false: glucose powder does not dissolve in water. (a) False (b) True
17. 17.🧈 Can this change be undone: melting butter? (a) can be undone (b) cannot be undone
18. 18.True or false: a balloon is not needed for the yeast balloon. (a) True (b) False
19. 19.🧺 Which of these is not needed for the muddy water filter? (a) a balloon (b) sand and pebbles (c) a clean glass (d) cotton or cloth
20. 20.🔮 Predict: you use more vinegar and more baking soda. What happens to the balloon? (a) it shrinks (b) it turns blue (c) there is no change (d) it grows bigger
21. 21.🪴 Which of these is a job of the leaves? (a) hold up the leaves (b) give out water vapour (c) hold the plant in soil (d) make seeds
22. 22.🛟 Some seeds from shops are coated with chemicals. What is the safe rule? (a) feed them to pets (b) throw them at friends (c) eat a few to check (d) never put seeds in mouth
23. 23.🔮 Predict: you pour muddy water through two layers of cloth instead of one. The water comes out ___. (a) muddier (b) clearer (c) hot (d) salty
24. 24.🫗 Which of these is done by evaporating? (a) sugar from sugar water (b) gravel from fine sand (c) bran from wheat flour (d) tea leaves from tea
25. 25.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) an adult with an iron (b) white paper (c) a balloon (d) a small bowl
26. 26.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is the one thing we change? (a) the same muddy water (b) the same funnel (c) the filter material (d) how clear the water is
27. 27.True or false: dipping the cotton bud is a job for an adult. (a) False (b) True
28. 28.True or false: dry yeast is needed for the yeast balloon. (a) False (b) True
29. 29.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “size of the balloon”? (a) we measure it (b) we change it (c) we keep it the same
30. 30.🍞 Does yeast need salt to make gas? (a) yeast needs it (b) yeast does not need it
31. 31.🟡 Which of these keeps turmeric yellow? (a) sugar water (b) soap solution (c) detergent water (d) baking soda water
32. 32.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a funnel or spoon (b) an empty bottle (c) baking soda (d) a magnet
33. 33.🧺 Do we need a mirror for growing salt crystals? (a) needed (b) not needed
34. 34.🛟 Turmeric stains clothes. What should you wear? (a) an old shirt or apron (b) a white party dress (c) your best clothes (d) your school uniform
35. 35.🫗 Muddy water is poured through a cloth filter. What stays on the cloth? (a) nothing (b) the mud (c) the water (d) the salt
36. 36.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the ironing time is kept the same. (a) True (b) False
37. 37.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the same muddy water”? (a) we measure it (b) we change it (c) we keep it the same
38. 38.🧺 Do we need a mirror for the muddy water filter? (a) not needed (b) needed
39. 39.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) water (c) soap solution (d) yeast
40. 40.🧂 Which of these dissolves in water? (a) chalk powder (b) cooking oil (c) glucose powder (d) small pebbles

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