seafloor spreading/continantal drift

Identify 4 evidences the helped prove the continents where moving and explain each one.

1. climate change
2. fossils
3. mountain ranges
4. coal


Seafloor Spreading-Explain it.

Identify 2 evidences that helped prove the sea floor was growing and explain each one.

1. the mid-alantic ridge- new seafloor is coming from it and moving away from it

2. subduction zones- is where it takes the seafloor and recycles it

Continental Drift Spreading

Continental drift-Explain it.


Identify 4 evidences the helped prove the continents where moving and explain each one.

1.Mesosaurus: lived on both continents when they where joined 
2.glossopteris: its been found in Africa, Australia, India, South America 
3.climate clues: South America, Africa, India, and Australia 
4.rock clues:  Greenland and Western Europe 


Seafloor Spreading-Explain it.

Identify 2 evidences that helped prove the sea floor was growing and explain each one.

1.divergent boundaries 

2.magnetic alignment of rocks in alternating strips 

seafloor spreading/continental drift

Continental drift-Explain it. The moving of the continents over long periods of times. Very Good!


Identify 4 evidences the helped prove the continents where moving and explain each one.

1.fossil that were found in other countries that are the exact same
2. plants in ice bergs
3. mountains that are the same in two different continents
4. shapes of the continents that look like puzzle pieces that could connect


Seafloor Spreading-Explain it.

Identify 2 evidences that helped prove the sea floor was growing and explain each one.

1. the floor is older in some places and newer in other places

2. magma sprouts out and makes  new flooring
Magnetic Reversals

Continental Drift/Seafloor Spreading

Continental drift/Seafloor Spreading.

Continental drift-Explain it. The gradual movement of the continents across the earth's surface through geological time.

Identify 4 evidences the helped prove the continents where moving and explain each one.

1. Puzzle pieces
2. Tropical glaciers scratches  

3. Mountain Minerals
4. Similar Fossils 


Seafloor Spreading-Explain it. The formation of new areas of oceanic crust, which occurs through the upwelling of magma at mid-ocean ridges and its subsequent outward movement on either side.

Identify 2 evidences that helped prove the sea floor was growing and explain each one.

1. First, samples of the deep ocean floor show that basaltic oceanic crust and overlying sediment become progressively younger as the mid- ocean ridge is approached, and the sediment cover is thinner near the ridge.  

2. Magnetic Reversals is the 2nd proof. A much better fit between the rifted continents is apparent when the shape of the continental slop is used instead of the continent's shoreline. Detailed mapping of distinctive rock units that extend out to sea along the South American and African coasts and North American and British coasts has shown that they would converge perfectly if the continents could be fitted together.

sea floor

continental drift is when the continentals drift apart and make now land. it was all one land mass
Identify 4 evidences the helped prove the continents where moving and explain each one.

1. Glacier scratch in the land forest
2. foils or on to different places
3. mounts in different places that are made in the same time
4. they look like puzzles


Seafloor Spreading is when magma comes up and cools and makes now land
Identify 2 evidences that helped prove the sea floor was growing and explain each one.

1. sonar Nope  

2. MT's that you can see Nope..what are MT's? 

Continental drift/Seafloor Spreading.

Continental drift-Explain it. You need to explain what it is here. 

Identify 4 evidences the helped prove the continents where moving and explain each one.

1.Glacier striations - in africa there are glacier striation but there are no glaciers near

2.Fossels - there is coal and plants in Antarctica

3.Geological features - the mountain ranges in Europe and north America are the same

4.climate change - you can find call in Antarctica

Seafloor Spreading-Explain it.

Identify 2 evidences that helped prove the sea floor was growing and explain each one.

1.magnetic reversal-magnetic field reversals definition. Changes in direction or orientation of the magnetic field of the Earth.  Great!

2.age of the rock - scientist have taken samples of the rock and some are a lot older than the other.  Good!

Continental Drift and Seafloor spreading

Identify 4 evidences the helped prove the continents where moving and explain each one.
Continental Drift explain it:

 Continental drift is the movement of continents moving relative to each other

1.   Glacial Structures:  Glacial structures support this too because rock have been studied and they have light and really deep scratches and these have been supported with the idea that glaciers went over them.

2.   Geological: Geological clues support this because plate tectonics move around Earth.

3.    Mountain Ranges: Because part of the Appalachian Mountains are in Asia and part are in the Easters part of the United States.

4.    Fossil: Fossils of the Mesosasaurus have been found in different continents that are far away from each other.

Seafloor Spreading-Explain it.

Formation of areas of oceanic crust. That involve hot magma erupting out of the ocean floor and then cooling down which cause the magma to crack when it cools down.

Identify 2 evidences that helped prove the sea floor was growing and explain each one.

1.  Age- When the magma starts getting older newer magma starts forming and the old magma pushes the newer one away.

2. Plate Tectonics- plate tectonics are evidence because as they slowly move away from each other beneath the ocean floor, hot magma from the Earth’s mantle bubbles to the surface.  

This is not a proof ..it is true but it is not prove that seafloor is actually growing.