Gases In The Atmosphere
Gbogbo ọrọ náà
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.
Ebumnobi
- 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
Akọmọ Ojú-ẹkọ
Ọ dị na ngwa Green Bridge
Budata ngwa Green Bridge CBT na ekwentị maọbụ kọmputa gị iji nweta akwụkwọ ndụmọdụ zuru oke, ajụjụ mmụta, na ndị ọzọ.
Ayẹwo Ẹkọ
Ekele diri gi maka imecha ihe karịrị na Gases In The Atmosphere. Ugbu a na ị na-enyochakwa isi echiche na echiche ndị dị mkpa, ọ bụ oge iji nwalee ihe ị ma. Ngwa a na-enye ụdị ajụjụ ọmụmụ dị iche iche emebere iji kwado nghọta gị wee nyere gị aka ịmata otú ị ghọtara ihe ndị a kụziri.
Ị ga-ahụ ngwakọta nke ụdị ajụjụ dị iche iche, gụnyere ajụjụ chọrọ ịhọrọ otu n’ime ọtụtụ azịza, ajụjụ chọrọ mkpirisi azịza, na ajụjụ ede ede. A na-arụpụta ajụjụ ọ bụla nke ọma iji nwalee akụkụ dị iche iche nke ihe ọmụma gị na nkà nke ịtụgharị uche.
Jiri akụkụ a nke nyocha ka ohere iji kụziere ihe ị matara banyere isiokwu ahụ ma chọpụta ebe ọ bụla ị nwere ike ịchọ ọmụmụ ihe ọzọ. Ekwela ka nsogbu ọ bụla ị na-eche ihu mee ka ị daa mba; kama, lee ha anya dị ka ohere maka ịzụlite onwe gị na imeziwanye.
- 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
Ọ dị na ngwa Green Bridge
Budata ngwa Green Bridge CBT na ekwentị maọbụ kọmputa gị iji nweta akwụkwọ ndụmọdụ zuru oke, ajụjụ mmụta, na ndị ọzọ.
Ọ dị na ngwa Green Bridge
Budata ngwa Green Bridge CBT na ekwentị maọbụ kọmputa gị iji nweta akwụkwọ ndụmọdụ zuru oke, ajụjụ mmụta, na ndị ọzọ.
Àwọn Ìwé Tó Dáa Láti Kà
Meecha Ajụjụ Ule Ọmarịcha
Ị chọrọ ime ajụjụ ule ọmarịcha gbasara Gases In The Atmosphere? Budata ngwa Green Bridge CBT iji nweta ajụjụ ule ọmarịcha na nyocha zuru ezu gbasara isiokwu a.
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