Gases In The Atmosphere
Bayani Gaba-gaba
The air you are breathing right now has barely changed its recipe in 200 million years. Around four-fifths is nitrogen, one-fifth is oxygen, and a handful of trace gases make up the rest. Yet one of those trace gases, carbon dioxide, is reshaping the planet's climate at a pace scientists can measure in real time.
In this lesson you will learn the composition of dry air, measure the percentage of oxygen using a practical method, describe the combustion of key elements in oxygen, explore thermal decomposition as a source of carbon dioxide, and understand why rising CO2 levels contribute to climate change through the greenhouse effect.
Manufura
- know the approximate percentages by volume of the four most abundant gases in dry air
- understand how to determine the percentage by volume of oxygen in air using experiments involving the reactions of metals (e.g. iron) and non-metals (e.g. phosphorus) with air
- describe the combustion of elements in oxygen, including magnesium, hydrogen and sulfur
- describe the formation of carbon dioxide from the thermal decomposition of metal carbonates, including copper(II) carbonate
- know that carbon dioxide is a greenhouse gas and that increasing amounts in the atmosphere may contribute to climate change
- practical: determine the approximate percentage by volume of oxygen in air using a metal or a non-metal
Taswirar tunani
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Bude taswirar tunani a cikin manhaja
Katunan tunawa
Gwaji mai sauri kan abin da ake jarraba a wannan batu.
Yi atisayen wadannan katuna a cikin manhaja
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Nazarin Darasi
Barka da kammala darasi akan Gases In The Atmosphere. Yanzu da kuka bincika mahimman ra'ayoyi da ra'ayoyi, lokaci yayi da zaku gwada ilimin ku. Wannan sashe yana ba da ayyuka iri-iri Tambayoyin da aka tsara don ƙarfafa fahimtar ku da kuma taimaka muku auna fahimtar ku game da kayan.
Za ka gamu da haɗe-haɗen nau'ikan tambayoyi, ciki har da tambayoyin zaɓi da yawa, tambayoyin gajeren amsa, da tambayoyin rubutu. Kowace tambaya an ƙirƙira ta da kyau don auna fannoni daban-daban na iliminka da ƙwarewar tunani mai zurfi.
Yi wannan ɓangaren na kimantawa a matsayin wata dama don ƙarfafa fahimtarka kan batun kuma don gano duk wani yanki da kake buƙatar ƙarin karatu. Kada ka yanke ƙauna da duk wani ƙalubale da ka fuskanta; maimakon haka, ka kallesu a matsayin damar haɓaka da ingantawa.
- What is the approximate percentage of nitrogen in dry air? A) 21% B) 78% C) 0.9% D) 0.04% Answer: B
- Which gas turns limewater milky? A) Oxygen B) Nitrogen C) Carbon dioxide D) Hydrogen Answer: C
- What is produced when magnesium burns in oxygen? A) Magnesium hydroxide B) Magnesium carbonate C) Magnesium oxide D) Magnesium chloride Answer: C
- Which of the following is NOT a greenhouse gas? A) Carbon dioxide B) Methane C) Water vapour D) Nitrogen Answer: D
- Thermal decomposition of copper(II) carbonate produces: A) Copper and carbon dioxide B) Copper(II) oxide and carbon dioxide C) Copper(II) oxide and carbon monoxide D) Copper(II) hydroxide and carbon dioxide Answer: B
Yi aikin wadannan tambayoyi a cikin manhaja
Yi aikin wadannan tambayoyi a cikin manhaja
Littattafan da ake ba da shawarar karantawa
Ƙarin koyo daga tushe na buɗe
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Sashen littafi
Occurrence, Preparation, and Compounds of Oxygen
Describe the properties, preparation, and compounds of oxygen
"Chemistry: Occurrence, Preparation, and Compounds of Oxygen" by OpenStax, OpenStax, Rice University, licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Source: https://openstax.org/books/chemistry/pages/18-9-occurrence-preparation-and-compounds-of-oxygen. Access for free at https://openstax.org/books/chemistry/pages/1-introduction
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Sashen littafi
Occurrence, Preparation, and Properties of Carbonates
Describe the preparation, properties, and uses of some representative metal carbonates
"Chemistry: Occurrence, Preparation, and Properties of Carbonates" by OpenStax, OpenStax, Rice University, licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Source: https://openstax.org/books/chemistry/pages/18-6-occurrence-preparation-and-properties-of-carbonates. Access for free at https://openstax.org/books/chemistry/pages/1-introduction
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