4 types of marine sediments

Four types of Marine Sediments and where they Derived From

  Lithogenous- Derived from land

Biogenous- derived from organisms

Hydrogenous or Authigenic- derived from water

Cosmogenous- derived from outer space

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Deep ocean trenches and island arcs

1. How and where do ocean treches form?
    These form at covergant plate boundaries when one plate i subducted beneath another
2. Describe an island arc?
     The arc shape results from the geometry of plate movement across the spherical earth, and the convex side of the arc points toward the ocean
3. What's the deepest trench in the world?
     Mariana Trench
4. What's trench does Japn lay next to?
      Japan Trench
5. Why do island arcs ARC?
      Since its subducting on a shere the converside is steeper so its forms on arc.
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1. What is Abyssal Plain?

An Abyssal Plain is an underwater plain on the deep floor

2. Where are AP found?

Found at depths between 3000 and 6000 meters. Also found between the edges of the continents and great underwater mountain ranges

3. What are the features of AP?

Thick layers of sediment covering most of these plains

4. How much of the earth do AP make up?

30 percent of the earths surface 

Adaptations of Sea Cave Creatures

Adaptations of Sea Cave Creatures



http://goo.gl/qlW6X

1. what are some typical adaptations for these animals, and why?

Lack of pigmentation, No eyes or their eyes are tiny, Development of sensory mechanisms to develop food and Predators.

2. why is oxygen not plentiful in caves, and how do creatures deal with the lack of oxygen?
No Photosynthesis , very limited water circulation in cave.

3. why do adaptations occur?
to provide an advantage to insure better survival of the organism.

hydrothermal vents 2-1-13

1. What exactly was described as "the biggest biological discovery on Earth?"
Hydrothermal vents in the depth of the ocean.
2. Where in the oceans was the discovery made?
250 ml off the coast of galpogos.
3. What was “interesting” about Tube Worms?
when you cut them they bleed like human blood substance.
4. How are species able to survive without sunlight? (What’s the process, if it’s not photosynthesis)
Kemosynthesis.
5. Where on Earth are hydrothermal vents located?
All around the earth.
6. Describe the theory of how life on Earth may have began at hydrothermal vents?