Lets explore the ocean floor. .
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Transcript of Lets explore the ocean floor. .
Lets explore the ocean floor.
http://www.ivebeenthere.co.uk/places/netherlands-antilles/bonaire/gallery.jsp
http://www.illustrationsof.com/details/clipart/8850.html
Thermal Vents
http://www.nsf.gov/news/overviews/earth-environ/interact01.jsp
Review Plate TectonicsThere are three
different plate boundaries.
Transform boundaries
Convergent boundaries
Divergent boundaries
http://en.wikipedia.org/wiki/File:Tectonic_plate_boundaries.png
Plate TectonicsTransform Plate Boundary
This type of boundary is one where the two plates slide against each other in a sideways motion.
These boundaries between plates is referred to as transform boundaries. As two plates slide past one another, in a transform boundary, neither plate is added to at the boundary, nor destroyed. http://www.kidsgeo.com/geology-for-kids/0047-transform-boundaries.php
http://www.kidsgeo.com/geology-for-kids/0047-transform-boundaries.php
http://www.kidsgeo.com/geology-for-kids/0047-transform-boundaries.php
Plate TectonicsConvergent Plate
BoundaryConverge is a large word that scientists use to describe two objects that come together.
In the case of plate tectonics, the two objects coming together are large plate-like pieces of the Earth’s crust. As these two plates push against each other, one is ultimately forced down beneath the other. http://www.kidsgeo.com/geology-for-kids/0046-convergent-boundaries.php
http://www.kidsgeo.com/geology-for-kids/0046-convergent-boundaries.php
Plate TectonicsDivergent Plate Boundaries
Diverge is a big word used by scientists to describe what happens when two objects move away from each other.
Thus, a divergent boundary is a boundary where two tectonic plates are moving away from one another. As we have already discussed, this most often takes place at ocean ridges. http://www.kidsgeo.com/geology-for-kids/0045-divergent-boundaries.php
Where are thermal vents found?First discovered in 1977
In the Pacific and Atlantic oceans
Depth of 2,100 meters (7,000ft.)
Divergent Plate Boundaries
Convergent Plate BoundariesThat are not close to the shore.
http://www.divediscover.whoi.edu/vents/vent-world.html
http://denali.gsfc.nasa.gov/dtam/data/ftp/gtam.gif
How it worksThe Earth's crust is moving apart, creating cracks and
crevices in the ocean floor.
http://www.divediscover.whoi.edu/vents/index.html
How it worksSeawater seeps into
these openings and is heated by the molten rock, or magma, that lies beneath the Earth's crust.
As the water is heated, it rises and seeks a path back out into the ocean through an opening.
It spouts a column of water heated by volcanic rock .
Why does it not boil?
The water coming out of the vents may be as hot as 400°C (750°F).
In the deep part of the ocean it is extremely cold and is only a few degrees above freezing.
http://www.windows.ucar.edu/tour/link=/earth/Water/temp.html&edu=high
SmokestacksWhen the super-hot vent water meets the
surrounding deep cold ocean water, the dissolved metals become particles and they form the smokestacks.
bioinfo.bact.wisc.edu/.../Intro.html
Black SmokerAre the hottest vents
They spew iron and sulfide
White smokersThe water released is cooler than the Black smokers.
Contains Barium Calcium Silicon
http://www.answers.com/topic/hydrothermal-vent
Life around the vents .TubewormsAnemonesClamsSpider crabs
http://www.onr.navhttp://usasearch.gov/search?v%3aproject=firstgov-images&v%3afile=viv_1101%4031%3amXS9tN&v%3aframe=list&v%3astate=root%7cN298&id=N298&action=list&y.mil/focus/ocean/habitats/vents.htm
Tubeworms in the Pacific Ocean
Spider crab
A string of clams winds across a vent http://www.pbs.org/wgbh/nova/abyss/life/extremes.html
Deep-sea anemone clings to lava outcrop http://www.pbs.org/wgbh/nova/abyss/life/extremes.html
Activity First lets make our own ocean water.
Need salt (lots of salt)
Need ice (lots of ice)
Mix
www.geekalerts.com
http://pushthefuture.wordpress.com
www.flickr.com
ActivityGet into groups of 4
One person in the group come up and get the materials
Lets Explore!
www.allposters.com.au
http://chemeng.ugm.ac.id/personalpages/index.php?menu=member_photo&profile=1&view=filmstrip&photo=6
Questions?
http://clientcarecards.com/category.php?category_id=1