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Term 4: Science Palm Cards - Flashcards

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Class:SCIE 030 - Current Topics in Science
Subject:Science
University:Yale University
Term:Fall 2014
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Term 4: Science
Name & describe properties & layers of the earth. The Core: Is the densest out of all the layers. it is made up of iron, nickel and other elements.

The Mantle: Is a thick shell of dense, rocky matter. It consists of iron-magnesium and is less dense than the core.

The Crust: There is two types: 
  • Oceanic: Basalt (8km)
  • Continental: Granite (30 km)

What are the names and definitions of the super continents?
  • Pangaea
Pangaea is a hypothetical supercontinent that included all current land masses. It later broke the continents apart, during the Triassic and Jurassic Periods.
  • Laurasia
Laurasia is the Northern Hemisphere supercontinent. This eventually broke up into North America, Greenland, Europe and Asia. 
  • Gondwana
Gondwana split up into Africa, South America, Australia, Antarctica, the Indian subcontinent and the Arabian Peninsula.
What was Hess's evidence to support Wegner's theory?
  • Seafloor speading
  • Magnetic striping
  • Age of the seafloor
  • sediment thickness
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Describe how gravity contributes to the movement of plate tectonics.
  • Slab Pull
  • Ridge Push
What evidence is there to support the theories of Earth layers and composition?
  • Seismology
  • Gravity Mapping
Describe Wegner's theory of continental drift & the evidence he lacked to prove his theory. Theory: 
The Earth's continents are not fixed in place, they move over geological time.

Evidence:
  • Continents seemed to fit together
  • Same fossils found on continents
  • Same rock formations.
How old is the Earth and what evidence is supports this?
  • Radioactive decay.
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Describe and list features of the different types of crusts. Oceanic:
  • Made up of Basalt (a dark coloured rock)
  • Example: The Hawaiian volcanoes.

Continental:
  • Made up of Granite (a light coloured rock)
  • Example: Sierra Nevada
Describe how gravity contributes to the movement of plate tectonics.
  • Slab Pull
  • Ridge Push
Describe how gravity contributes to the movement of plate tectonics.
  • Slab Pull
  • Ridge Push
Describe the evidence that supports the view that Australia is an extremely old continent. Australia is an old continent. It's existence dates back to Pangaea (225 million years ago). The evidence is found in the rocks of Australia's crust.
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 Term 4: Science 
 Name & describe properties & layers of the earth.The Core: Is the densest out of all the layers. it is made up of iron, nickel and other elements.

The Mantle: Is a thick shell of dense, rocky matter. It consists of iron-magnesium and is less dense than the core.

The Crust: There is two types: 
  • Oceanic: Basalt (8km)
  • Continental: Granite (30 km)

 What are the names and definitions of the super continents?
  • Pangaea
Pangaea is a hypothetical supercontinent that included all current land masses. It later broke the continents apart, during the Triassic and Jurassic Periods.
  • Laurasia
Laurasia is the Northern Hemisphere supercontinent. This eventually broke up into North America, Greenland, Europe and Asia. 
  • Gondwana
Gondwana split up into Africa, South America, Australia, Antarctica, the Indian subcontinent and the Arabian Peninsula.
 What was Hess's evidence to support Wegner's theory?
  • Seafloor speading
  • Magnetic striping
  • Age of the seafloor
  • sediment thickness
 Describe how gravity contributes to the movement of plate tectonics.
  • Slab Pull
  • Ridge Push
 What evidence is there to support the theories of Earth layers and composition?
  • Seismology
  • Gravity Mapping
 Describe Wegner's theory of continental drift & the evidence he lacked to prove his theory.Theory: 
The Earth's continents are not fixed in place, they move over geological time.

Evidence:
  • Continents seemed to fit together
  • Same fossils found on continents
  • Same rock formations.
 How old is the Earth and what evidence is supports this?
  • Radioactive decay.
 Describe and list features of the different types of crusts.Oceanic:
  • Made up of Basalt (a dark coloured rock)
  • Example: The Hawaiian volcanoes.

Continental:
  • Made up of Granite (a light coloured rock)
  • Example: Sierra Nevada
 Describe how gravity contributes to the movement of plate tectonics.
  • Slab Pull
  • Ridge Push
 Describe how gravity contributes to the movement of plate tectonics.
  • Slab Pull
  • Ridge Push
 Describe the evidence that supports the view that Australia is an extremely old continent.Australia is an old continent. It's existence dates back to Pangaea (225 million years ago). The evidence is found in the rocks of Australia's crust.
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