Oceanography
Name at least 3 sciences used in Oceanography.
Biology, Physics, Chemistry, Geology and all that follows.
The oldest rocks were found in ________________ and are __________________ years old.
What are Canada (North American craton) and 4.4 billion?
The study of the formation and movement of the Earth's crust.
What is plate tectonics?
The age of the Earth.
What is 4.5 billion years?
Name 3 ocean resources.
What are seafood, transportation, energy, mineral mining, oil and gas production?
The names of two scientists important to increasing our understanding of ocean geology.
Who are...Bob Ballard, Alfred Wegner, Hess, Jacques Cousteau, marie Tharpe...
Crystals which support the theory that Earth may have had water vapor much earlier than previously thought.
What are zircon crystals?
Described as a rip or tear in the Earth's mantle running from Iceland through the North and South Atlantic oceans.
What is the Mid-Atlantic Ridge?
4.2 billion year old sedimentary rock outcrops are evidence of this geologic feature.
What are shallow seas?
The most abundant elements in Earth's crust.
What are the silicates? (Oxygen, silicon)
One of the first Ocean Exploration voyages dedicated to scientific discovery and understanding of the ocean floor.
Two theories that work to explain how Earth's water came to be.
What are Comet Arrival and Outgassing?
The young cartographer that brought Alfred Wegner's continental drift theory back to life in the 1950s.
Who is Marie Tharp?
The theory which states that a collision between the Earth and a planetessimal which caused the Earth to increase in size, and the separation of elements by density to accelerate.
What is the Iron Catastrophe?
A parallel process to photosynthesis which occurs without access to sunlight.
What is chemosynthesis?
What is sonar and how does it help us map the ocean floor?
Sends sound waves that bounce and return to source. The way it bounces back helps determine the topography.
The living rocks that were essential in creating Earth's atmosphere capable of supporting life.
What are stromatolites?
A boundary in which old crust is 'recycled' back into molten rock.
What is a subduction zone?
The age of the Moon.
What is 4.4 billion years?
Areas of the ocean floor where highly mineralized, super-heated water is released into the deep ocean.
What are black smokers, hydrothermal vents, or hydrothermal vent communities?
What are three technologies used to help map the ocean floor?
Submersibles, sonar and satellites
Draw a sketch of the ocean floor from continental margin to continental margin.
on your board
Two pieces of evidence to support the theory of seafloor spreading.
What are symmetrical and reversed polarity, and age of rock moving from the mid ocean ridges?
The first 600 million years of Earth's existence, described as hell-like, with molten seas and tremendous volcanic activity.
What is the Hadeon Era?
The most accessible place on Earth to see evidence of sea floor spreading.
What is Iceland?