Batholith

Armstrong and others (1977) called the northern part of the hourglass the "Bitterroot" lobe and the southern part the "Atlanta" lobe. He also proposed that most of the southern lobe was emplaced 75 to 100 million years ago (Late Cretaceous); whereas the northern lobe was emplaced 70 to 80 million years ago. Armstrong (1977) further noted that older plutons of Jurassic age occur on the northwest side of the Bitterroot lobe and many Eocene plutons have intruded the eastern side of the Atlanta lobe of the batholith. On the western side of the batholith, there are more mafic plutons (quartz diorites or tonalites) than to the east.
Radiometric dates and field relationships, where plutons of the batholith cut older rocks, restrict the age of the Idaho Batholith to an interval between 180 million years ago (Late Triassic) to 45 million years ago (Eocene); however, the dominant interval of emplacement was Early to Middle Cretaceous. There is a general west-to-east decrease in age for plutons of the batholith.

valcano

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volcanoes are amazing.  they create and destroy, they grow and they fall.  they even erupt in three different ways.  explosions, dome building, and spire making.  it all depends on how much water is in the lava.  the heat turns the water into gas which sends the lava up and out of the volcano.
I learned  a lot of this on channel two last night when some geologists were talking about Mt. Saint Helens. it had all of the different eruptions that i listed above.  first in 1980, Mt. Saint Helens blew up leaving the legendary crater in its surface.  watching Saint Helens blow up in three different spots looked like three missiles hit it.  Saint Helens erupted again in 1983, this time it started dome building.  the mountain would slowly ooze black sticky lava that built the dome,  after a while it just stopped.  finally, in 2004,  it erupted again by making spires.  the spires then crumbled and started again.  the spires stopped 3 years ago.

water cycle

The Water Cycle (also known as the hydrologic cycle) is the journey water takes as it circulates from the land to the sky and back again.

The Sun's heat provides energy to evaporate water from the Earth's surface (oceans, lakes, etc.). Plants also lose water to the air (this is called transpiration). The water vapor eventually condenses, forming tiny droplets in clouds. When the clouds meet cool air over land, precipitation (rain, sleet, or snow) is triggered, and water returns to the land (or sea). Some of the precipitation soaks into the ground. Some of the underground water is trapped between rock or clay layers; this is called groundwater. But most of the water flows downhill as runoff (above ground or underground), eventually returning to the seas as slightly salty water.

 http://www.enchantedlearning.com/subjects/astronomy/planets/earth/Watercycle.shtml

properties of Ocean and water

Because the Northern Hemisphere is dominated by land and the Southern Hemisphere by sea, temperature differences between summer and winter are more extreme in the Northern Hemisphere (the land warms and cools more quickly than the ocean). In the diagram, average land and sea temperatures are shown for each place on Earth, from the North Pole (left) to the South Pole (right). New Zealand is located around 40º S, in the temperate climate zone, where land temperatures change about as much as sea temperatures. For our antipodes at the other side of the globe, the situation is much different. They experience hotter summers and colder winters.

igoogle

http://www.universehttp://www.universetoday.com/14491/why-does-the-earth-rotate/why does the earth rotatehttp://www.youtube.com/watch?v=fDpVCsMkrQ0today.com/14491/why-does-the-earth-rotate/
The rotation of our planet has an impact on almost all life on Earth. As the Earth turns on its axis, each part of the planet gets a chance to face the Sun and be warmed in a relatively short period of time.