chapter 2 aice marine

Front

What evidence supports the theory of plate tectonics.

Back

Continental drift, seafloor spreading, and paleomagnetic stripes

Front

how do hydrothermal vents form?

Back

When cold ocean water seeps through oceanic crust near subduction zones

Front

How do abyssal plains form

Back

They are formed from divergent boundaries. Magma rises upwards when it cools it solidifies and becomes new rock. The covering of sediment creates that flat surface on the seafloor

Front

Name 3 features for each boundary

Back

Transform- earthquake

Divergent- Trench

Convergent- Volcanoes

Front

what is Convergent boundary

Back

Two plates that are moving towards each other

Front

What is a scientific theory?

Back

An idea or explanation of events of the real world.

Front

State one piece of evidence that supports abyssal plains

Back

Seafloor spreading

Front

Weathering and erosion affect the type and morphology of shorelines that develop in the littoral zone. Explain how erosion can affect the morphology of the different types of shore. In your answer include a reference to the four main types of erosion

Back

Erosion can affect the morphology of the different types of shore because of the 4 different types. For example ice erosion can form rocky shores by causing the glaciers to move over land and the weight crushes and breaks rock. The ice then transports the sediment to a new location and deposit the rocks onto the coast. Gravity erosion can also form rocky shores by moving big rock boulders from higher surfaces into water. Wind erosion can form sandy shores by picking up those fine sandy particles and carry them across the shoreline. Muddy shores are least exposed to weather and erosion however water erosion can transport the mud onto shore and deposition creates this shoreline

Front

Explain why dissolve sulfide is in relativity high concentration in a hydrothermal vent plume

Back

The reason for high concentration of dissolved sulfide in a hydrothermal vent plume is because when the seawater meets with earth's crusts near the vents it gets heated by magma causing chemical reactions between the water and nearby rocks that contain sulfide.

Front

Explain how chimneys form at hydrothermal vents.

Back

These vents form at divergent boundaries where the cold ocean water meets superhot water in the crust. As the water cools minerals like zinc, sulfide, copper and iron precipitate out of the solution. These minerals form solids that settle near the opening, piling up since they can't dissolve in cold water. This leads to the formation of a chimney.