1. Atmosphere Presentation by Jerry Po ř ízka & Lucy Pa ř íkova

2. Atmosphere Fluent cover of Earth Into 560 kilometers above surface Earth is composed of molecules. Air is matter Air is composed of different gasses  Nitrogen – N 2  Oxygen – O 2  Carbon dioxide – CO 2  Water vapor – H 2 O (g)  Noble gasses

3. Atmospheric layers Troposphere Tropopause Stratosphere Ozonosphere Mezosphere Thermosphere Ionosphere

4. Elements in the Atmosphere Oxygen - O 2  20,95 volumetric %  Wan gas without taste and smell  In firm and liquid phase is blue  Very reactive element (reaction are mostly exotermic)  Its one of the most importatnt elements in the air  its vital for all living organisms  oxygen supports burning  Boiling point 183°C  Boiling melt 218°C  In steel bottle with blue strip

5. Elements in the Atmosphere Ozone – O 3  In 25 kilometer above Earth is ozzone layer which absorb ultraviolet light  It‘s gas with blue colour and bad smell  In liquid phase is dark blue  In higher concentration is deleterious for us  Ozzone is explosive  Boiling point 111,9°C  Boiling melt 192,5°C

6. Elements in the Atmosphere nitrogen - N 2  78,08 volumetric %  Wan gas without taste and smell  Light gas. Lighter than air  little reactive element. Nitrogen has strong structure  Its one of the most importatnt biogenous elements.  It is part of albumin and amino-acid  Boiling point 195,8°C  Boiling melt 210°C  In steel bottle with green strip

7. Elements in the Atmosphere Carbon dioxide – CO 2  0,033 volumetric %  It‘s not toxic  above concentration 10% makes sleepiness till death  in higher concentration makes burn  Boiling point -78,5°C  Boiling melt - 56,6°C

8. Elements in the Atmosphere Water vapor – H 2 O (g)  Vapour is only element which has‘nt constant value. Change with places and season  water is important for life  transport sustenance and waste matters

9. Physical properties Gases are coercible Air Molecules are in constant motion They come in contact with surfaces – they push and press the surface – That create the air Pressure –We can measure air pressure to help us predict weather conditions around the world

10. Atmosphere in former times Chemical structure atmosphere was change Primary structure was:  N 2  NH 3  H 2 O  CO 2 Synthesize formaldehyde → solvent oxygen: H 2 O + CO 2 → HCOH + O 2

11. Atmosphere today Today chenical structure atmosphere is:  N 2 78,08%  O 2 – 20,496%  CO 2 – 0,033%  H 2 O (g)  Noble gasses – mostly Ar – 0,934% Thanks fotosinteze is solvent oxygen 6CO 2 + 12H 2 O → C 6 H 12 O 6 + 6O 2 + 6H 2 O Today is air dirty injurious gases: H 2 S, Cl 2, N 2 O, NO 2, SO 2, CO,