Plate Tectonic Check In

Ridges are formed near divergent boundaries. Which diagram below best represents the movement of divergent boundaries?

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• 
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• None of the above represent divergent boundaries

One of the first people to discover that the continents may have been together at one time was a man named Alfred Wegener. He gathered his evidence by simply looking at a map. What was it that he argued?

• Fossils were found scattered throughout the ocean
• The different continents looked like they fit together like a puzzle
• Glacial deposits were evident around Antarctica
• Rocks have been eroded away near many mountain ranges

Two pieces of evidence that scientists use today to prove that the continents were at one time altogether are

• Rock structure and glacial deposits along coastlines where the continents would fit together
• Oceanic ridges within the Atlantic and fossils found in the central area of each continent
• Volcanic activity and the present life forms found on different continents
• None of these are used as proof that the continents were once together

What is Pangea?

• A supercontinent that was made up of all 7 continents millions of years ago
• A convection current under the Earth's surface cause volcanic activity
• A drifting land mass that is moving toward another landmass
• Trenches on the sea floor where subduction takes place

The ocean floor changes everyday as tectonic plates continue to move

• True

• False

When looking at the shape of the continental shelves that surround South America and Africa, it can be observed that the continental shelves fit together. This observation is used to support the idea that

• the continental shelves of these two continents are made of the same type of rock material.
• the tectonic plates beneath these continents are roughly the same age.
• these continents were joined in the past and have moved apart since that time.
• the material that makes up these two continental shelves comes from sediments eroded from the continents

True or False Tectonic plates continue to move at a very slow pace

• True
• False

Fossils have helped prove the theory that at one point in time certain continents were together helping form a large supercontinent. How have fossils helped.

• The same fossils that may have lived in cold climates were also found on continents with current warmer climates
• The same fossils have been found on different continents where they seem to fit together
• The same fossils that did not have the ability to swim were found on opposite ends of large bodies of water
• All of the above

The image below shows Eurasia and Australia and the fossils that were found there about 150 million years ago. Based on the information, were these continents attached at one time?

• Yes, because they look like they fit like a puzzle
• Yes, because they have similar fossils
• No, because they do not fit together and have different fossils
• No, because they are not touching now so they couldn't have been 150 million years ago

Boundaries the collide together often result in the formation of mountains

• True

• False