Earth System Science Chapter 13 Study Summary Table PDF

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Chapter 13 summary...

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Chapter 13: Historical Biogeography Key Concept 1: The First 90% of Earth’s History -Atmospheric circulation enhanced chemical weathering + first sediments were formed in water. -Early environment was mainly warm + moist although there were some ice ages. -Photosynthesis changed the nature of the atmosphere. -UV light confined organisms to sea.

Key Concept 2: Life on Land -First plants needed vascular systems. -Compotation for light led to development of woody plants. FIRST FLOWERING PLANTS: -Flowers evolved to allow seed production. -Angiosperm.

Key Concept 3: Evolution and Spread of Humans -DNA records make it clear humans originated in Africa + migrated to the rest of the world on one or more occasions.

Key Concept 4: Rise of Agriculture, in Australia -Australian people followed a hunting + gathering lifestyle. -Fire was used to encourage the productivity of certain plant species.

Key Concept 5: The Transition from the Prehistoric to Historic Period -Agricultural practices were introduced from Europe + new animals + plants were imported. INTRODUCTIONS OF NEW SPECIES: -Introduced species compete with native species for space, water + nutrients. CLEARING THE LAND AND EXTINCTIONS: -Clearing of land for grazing, crops + urban + industrial land has had the most profound influence on biota in Australia. CLEARING AND INVASION: -Several native vegetation families have disappeared because they occupied climate or soil suitable for agriculture.

Chapter 13: Historical Biogeography...