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plants
(biosphere) pull water (hydrosphere) and nutrients fort he soil (litosphere) and realese orxygen and water varpor tinto the air (atmosphere)
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Heat
- solar energy (the sun)- the earth is on an axis and the sun hits the surface at varying angles cause the major climates of the planet.
- radioactivity (earths core)-radioactivity is responsible for plate tectonisc, most volacnoes and earthquakes are near plate boundaries.
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weathering
the process of changing structures throught he effect of wind,s water, ice, sun, gravity
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erosion
the process of moving trhe wathered materials (river and winds)
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rock cycle
all rocks come fromt eh mantle (except limestone)
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igneous
forms when magma cools (graniite pumice
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sedimentary
forms when layers of sediments are compressed (sansotne, limestone, cole, shale
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metamorphic
forms throguht hte transformation of igneous and sedimentary rocks throgh heat and pressure (marble, slate, quartzite)
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Weather cycle
- occurs in the troposphere
- solar radition:heat energy (inferaded radioiaotn ) from the sun that hits the earths surgace is changed into heat.
- earth movement: the seasons are caused byt he orbit around the cun and the rotation of earths upon its axis-vernal equinox, summer solsitce, autumnal equinox, winter solstice
- water cycle:
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principle of uniformation
the scientigic laws that gobern earth today are teh same since the beginging of time
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law of superpostion
the oldes rocks and event are found a thte bottom of formations
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Precambian eon
period of time fromthe formation of earth to rthe rise of life forms
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phanerozoic eon
- the rest of the time to the present . three eras are found witin the phanerozoic eon:
- palezoic:early life-trillobites, shells, molusks, first vertebrates, land plants, insect, seed plant.
- mesozoic: middle life- the rise of mamals and dinoaurs, the rise of birds, extincitono f dinos and flowering plants.
- cenzoic: late life to present- rise of primates , hourses, hominids and modern man.
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