Earth Science PDF

Characteristics of Earth that are necessary to support life Earth has been existing 4.543 billion years. Earth was made due to the following factors: Water Heat Source - Important ingredients in the Inter...

Characteristics of Earth that are necessary to support life Earth has been existing 4.543 billion years. Earth was made due to the following factors: Water Heat Source - Important ingredients in the Internal Heating of the Earth - different biological caused by radiogenic heat from processes. radioactive decay of materials in - The absence of water the core and mantle, and extruded interferes with reactions via active tectonic activities, such necessary for life. as volcanism and plate movement - It makes up 71% of the Earth’s surface External Heating of the Earth - - Universal Solvent (It is heat provided by the sun is in the capable of dissolving form of radiation which enters the substances) Earth. - H20 (Hydrogen Oxide) Atmosphere Layers of the Atmosphere: - Earth’s atmosphere is made a. Troposphere - the lowest up of 78% Nitrogen, 21% layer of the atmosphere Oxygen, 0.9% Argon, 0.03 - Where weather Carbon Dioxide occurs/happens - Provides significant - Tropopause - separates the insulation or shielding from troposphere from the the sun and the impact of stratosphere small to medium-sized meteorites b. Stratosphere - Second layer - Greenhouse gases like of the atmosphere carbon dioxide (CO2), - Stratopause methane (CH4), and Water Vapor trap heat and protect c. Mesosphere - Slow down our planet from freezing meteorites hurting into the (60F) atmosphere, meteorites that - The ozone layer (O3) shields enter get burned the Earth’s surface from  harmful Ultraviolet Radiation - Mesopause - Atmosphere provides Nitrogen and Carbon d. Thermosphere - Absorb Dioxide ultraviolet light from the sun - Gravity affects the Earth’s causes photoionization atmosphere - Ionosphere - part of the - Size and distance from the thermosphere, made up of sun affect the planet’s ability electrically charged gas to hold the atmosphere. particles/for radio signals e. Exosphere - Outermost layer of the atmosphere - Air is thin Energy Strong Magnetic Field - Living organisms like plants - It shields us from the and photosynthetic bacteria electromagnetic radiation use light as the source of coming from the sun their energy. - Photosynthesis - Earth orbits in the Goldilocks-zone Nutrients Tectonic Plates - Build and maintain an - Or Lithospheric Plate, a organism’s body structure. massive, irregularly shaped - Insufficient or absence of slab of solid rock made up of nutrients can impede the continental and oceanic synthesis of the different lithosphere. biological molecules. - Volcanism helps in nutrient cycling