Atmosphere

Atmosphere

• Mixture of gases air

Atmospheric gases (now) Percentage (%) by volume

Nitrogen 78,08

Oxygen 20,95

Argon 0,93

Carbon Dioxide 0,03

Water vapor, ozone, and othergases

0,01

Graph

Nitrogen

Oxygen

Argon

Carbon Dioxide

Water vapor,

ozone, and other gases

Atmospheric gases

Graph

Composition of the atomsphere

Early atmosphere :

More carbon dioxide and methane

Now: More oxygen

• Photosynthesis

Layers of the atmoshere

https://www.youtube.com/watch?v=WaikvaAw2nk

LayersExoshere 600-

10.000 kmHydrogenand helium

- Less gasparticles

Meteorological satellites

Thermosphere 80-600 km 1500ºC -IonosphereLayer

Mesosphere 50-80 km No watervapor orozone

-100ºCLowesttemperatures

Stratosphere 15- 50 km Almost no watervapor-Ozone

-Ozone layer30 km altitud

Troposphere 0- 15 km -Oxygen-Carbondioxide-nitogenWatervapor

75% atmoshericmass

Area we liveinChanges in weather

Ozone Layer

• https://www.youtube.com/watch?v=1b3-l4BxqGA

Question

• The sun heats our planet…..

Greenhouse effect

• Caused by :

– Water vapor

– Carbon dioxide

– Methane

–Function: retain the heat from the sun:

– average :15ºC liquid water

sustains life

Atmosphere

Greenhouse effect sustains life

Ozone layer filters UV

Maintains life oxygen / carbon dioxide

Weather water cycle

Video

• https://www.youtube.com/watch?v=BRczqAFIjoM