CHAPTER 3 Change in the biosphere. 3.1 THE CHANGING ENVIRONMENT  The earth has lived for 4.45 billion year and during that time there have been many.

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Presentation transcript:

CHAPTER 3 Change in the biosphere

3.1 THE CHANGING ENVIRONMENT  The earth has lived for 4.45 billion year and during that time there have been many changes with human activity.

3.1 PAGE 2  The lithosphere is one of the most changed things on earth. Tectonic plates move the continents about 2 cm per year.

3.1 PAGE 3  Other ways that the lithosphere changes is weathering and erosion over many years. For example, the Grand Canyon is the effect of erosion by the Colorado River

3.1 THE HYDROSPHERE  The hydrosphere is another part of the earth that is constantly changing. Oceans and seas all around the world never stay the same.

3.1 PAGE 5  The ice age is one of the times when the hydrosphere has changed dramatically. The earth was covered with many glaciers that helped form the present day earth.

3.1 PAGE 6  Another change in the hydrosphere is the El Nino. This is a stretch of warm water that runs along the coast along the South American coast and it is in effect for only a few weeks.

3.1 THE ATMOSPHERE  The atmosphere also has a series of changes that happen all year round.

3.1 PAGE 8  The atmosphere can change by the rotation of the axis and also simpler things like volcanic eruptions.

3.2 NEEDS OF ORGANISMS  Organisms have many needs to live and survive in the environment.

3.2 PAGE 2  Water is one of the most important factors in life. Water is needed for plants and animals to stay hydrated.

3.2 PAGE 3  Another need for life is food and energy. When animals eat food they obtain certain nutrients that are needed to live.

3.2 PAGE 4  All animals need living space. Their living space is called territory and it gives animals shelter and other safe reasons.

3.3 THE ECOSYSTEM  Species- a group of organisms so similar to one so that they can breed.  Habits- specific environment in which a species live in.  Geographical range- total area in which a species can live  Population- all members of a species that live in the same geographic area  Community- all the different populations that live and interact in the same area  Ecosystem- includes all communities in an area  Biodiversity- variety of species in an ecosystem