Rocks.powerpoint.jocelyn cabling
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Rocks.powerpoint.jocelyn cabling



jocelyn demo

jocelyn demo



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Rocks.powerpoint.jocelyn cabling Rocks.powerpoint.jocelyn cabling Presentation Transcript

  • Science Subject
  • Identify the following.
    • It is a volcano that has moderately steep sides and sometimes have small craters in their summits.
    • This volcano consists almost entirely of loose, grainy cinders and almost no lava, They are small volcanoes.
    • This volcano has low slopes and consists almost entirely of frozen lavas. They almost always have large craters in their summits.
  • Rocks
  • What is rocks? Rocks - it is a solid part of the earth.
  • 3 Types of Rocks Sedimentary Rocks Metamorphic Rocks Igneous Rocks
  • Igneous Rocks How it is formed ?
    • Fire Rocks
    • Formed underground by trapped, cooled magma
    • Formed above ground when volcanoes erupt and magma cools
  • 2 Types of Igneous Rocks
    • Extrusive Igneous Rocks
    • Is made when magma comes to the Earth’s surface in the form of lava and cools and harden.
    • Intrusive Igneous Rocks
    • If the magma stays underground , cools and harden.
  • Example of Igneous Rocks Granite Scoria Pumice Obsidian
  • Sedimentary Rocks How it is formed?
    • Wind and water break down the earth
    • Bits of earth settle in lakes and rivers
    • Layers are formed and build up
    • Pressure and time turn the layers to rock
  • 3 Main Types of Sedimentary Rocks
    • Clastic – little pieces of broken up rock which have piled up and been “lithified” by compaction and sedimentation.
    • Chemical- many of this form when standing water evaporates, leaving dissolved minerals behind.
    • Organic- many animals use calcium for shells, bones and teeth. These bits of calcium can pile up in the sea floor and accumulate into a thick enough layer to form an organic sedimentary rock.
  • Example of Sedimentary Rocks Gypsum Sandstone Shale Limestone Conglomerate
  • Metamorphic Rocks How it is formed?
    • Rocks that have changed
    • They were once igneous or sedimentary
    • Pressure and heat changed the rocks
  • 2 Basic Types of Metamorphic Rocks
    • 1. Foliated Metamorphic Rocks
    • - rocks which have layered or banded appearance that is produced by exposure to heat and directed pressure.
    • 2. Non Foliated Metamorphic Rocks
    • - rocks which do not have a layered or banded appearance.
  • Examples of Metamorphic Rocks Schist Gneiss
  • Rocks Have Been Used For Many Years and For Many Things
  • Rocks