Gases In The Atmosphere
Muhtasari
The air around you is a mixture of gases, and each one plays a role in the chemistry of our planet. Knowing what the atmosphere is made of, how to measure it, and what happens when elements burn in oxygen connects laboratory chemistry to global issues like climate change.
In this lesson you will learn the composition of dry air, how to determine the percentage of oxygen experimentally, what happens when magnesium, hydrogen, and sulfur burn in oxygen, and why rising carbon dioxide levels are a cause for concern.
Malengo
- 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 and non-metals with air
- Describe the combustion of elements in oxygen, including magnesium, hydrogen and sulfur
- Know that carbon dioxide is a greenhouse gas and that increasing amounts in the atmosphere may contribute to climate change
- Determine the approximate percentage by volume of oxygen in air using a metal or a non-metal
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Tathmini ya Somo
Hongera kwa kukamilisha somo la Gases In The Atmosphere. Sasa kwa kuwa umechunguza dhana na mawazo muhimu, ni wakati wa kuweka ujuzi wako kwa mtihani. Sehemu hii inatoa mazoezi mbalimbali maswali yaliyoundwa ili kuimarisha uelewaji wako na kukusaidia kupima ufahamu wako wa nyenzo.
Utakutana na mchanganyiko wa aina mbalimbali za maswali, ikiwemo maswali ya kuchagua jibu sahihi, maswali ya majibu mafupi, na maswali ya insha. Kila swali limebuniwa kwa umakini ili kupima vipengele tofauti vya maarifa yako na ujuzi wa kufikiri kwa makini.
Tumia sehemu hii ya tathmini kama fursa ya kuimarisha uelewa wako wa mada na kubaini maeneo yoyote ambapo unaweza kuhitaji kusoma zaidi. Usikatishwe tamaa na changamoto zozote utakazokutana nazo; badala yake, zitazame kama fursa za kukua na kuboresha.
- Which gas is most abundant in dry air? A) Oxygen B) Carbon dioxide C) Nitrogen D) Argon Answer: C
- The approximate percentage of oxygen in dry air is: A) 0.04% B) 0.9% C) 21% D) 78% Answer: C
- When magnesium burns in oxygen, the product is: A) Magnesium hydroxide B) Magnesium oxide C) Magnesium carbonate D) Magnesium sulfate Answer: B
- Carbon dioxide is classified as a greenhouse gas because it: A) Is produced by plants B) Absorbs infrared radiation C) Is colourless D) Is denser than air Answer: B
- In the copper experiment, the copper turns black because: A) It melts B) It reacts with nitrogen C) It forms copper(II) oxide D) Carbon is deposited on it Answer: C
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Vitabu Vinavyopendekezwa
Jifunze zaidi kutoka vyanzo huria
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Sehemu ya kitabu
Climate and the Effects of Global Climate Change
Define global climate change
"Biology: Climate and the Effects of Global Climate Change" by OpenStax, OpenStax, Rice University, licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Source: https://openstax.org/books/biology/pages/44-5-climate-and-the-effects-of-global-climate-change. Access for free at https://openstax.org/books/biology/pages/1-introduction
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Sehemu ya kitabu
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
Vimechapishwa na mashirika mengine chini ya leseni huria na vinatajwa kama wanavyoomba. Viungo hufungua tovuti zao.
Fanya Mazoezi ya Maswali ya Majaribio
Ungependa kufanya mazoezi ya maswali ya majaribio kuhusu Gases In The Atmosphere? Pakua programu ya Green Bridge CBT ili kupata maswali ya majaribio na tathmini kamili za mazoezi kuhusu mada hii.
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