Flashcards
oceanography 1
Flashcards do conjunto (33)
- 1What is the diameter of the earth?The earths diameter is 12,742 km
- 2What is the diameter of the water ball?The diameter of the water ball is 1,380km
- 3What is the percentage of water around the earth?97.5% of the water of the earth is found in the ocean, 2.5% is in freshwater and <1% is ready to be used, in lakes or rivers.
- 4What is a rip current?A rip is a strong localised narrow current of water which moves directly away from the shore and is the strongest near the surface of the water.
- 5What caused the mass death of fish in bayou chaland area of Louisiana?The cause of death for the mass amounts of fish in bayou Louisiana was a dead zone, which means the water concentrations had low oxygen.
- 6What hurricanes?Hurricane Katrina (2005) and Hurricane Harvey (2017)
- 7How much does the sea height variation increase over time?The sea height increases at around 3.3 millimetres per year
- 8Who is the father of Geography?The father of geography is Eratosthenes
- 9Who partook in the Early voyage discovery?Zheng Ma He partook in the early voyage discovery in 1400AD
- 10How many of the crew members returned form the Circum-navigate by Magellan?18 out of the 260 crew members returned
- 11When did the voyages of captain james cook occur?Captain James Cook was the first marine scientist that voyaged between 1768 – 1780
- 12What is a buoy?A buoy is a long-term device which measures the meteorological and ocean conditions from a fixed location.
- 13What is an argo float?An Argo float is a global array of free drifting profiling floats that measures the temperature and salinity of the upper 2000m of the ocean.
- 14What is the state of matter on the eight plannets in the solar system?The 4 inner planets are terrestrial whereas the 4 outer planets are gaseous
- 15When did the big bang theory occur?The big bang theory occurred around 13.7 billion years ago
- 16What is the structure of the earth’s core?The earths core is made up of the inner core which is solid, and the outer core which is liquid
- 17What is the earth’s mantle?The earths mantle is where most of the mass and volume comes from
- 18What is the earth’s crust?The earth’s crust is 4-60km thick, oceanic denser and continent thicker
- 19How deep into the earth can humans go?Humans can go less than 4km deep into the earth.
- 20How do we know the earth is not homogenous?We know the earth is not homogenous as earthquake waves do not go directly through the earths core, instead it refracts
- 21When was the last global glaciation?The last global glaciation was during the late Pleistocene, 21,000 years ago
- 22How many tectonic plates are there?There are 7 large tectonic plates, however, there are 15-20 moving tectonic plates.
- 23Who first proposed the continental drift mechanism?Alfred Wegner, 1912, first proposed the continental drift mechanism. This was the correct idea, wrong mechanism
- 24What was the proposed theory of the continental drift mechanism?The proposed theory was that 200 million years ago there was one piece of land called the Pangaea and one ocean called the Panthalassa.
- 25Who came up with seafloor spreading, spreading centres and subduction zones?Harry Hess and Robert Dietz 1960
- 26Who further researched plate tectonics and lithospheric plates?John Tuzo Wilson 1965
- 27What are the three plate boundaries?The three plate boundaries are: Divergent plate boundaries, Convergent plate boundaries and Transform plate boundaries
- 28What is the formula for echo sounding?The formula for echo sounding is Depth = V(T/2)
- 29What are the features of Earths solid surface?The features of earths solid surface are continental crust (40.6%) and oceanic crust (59.4%)
- 30What is the name of the submarine that can dive to a depth over 7000m?The submarine that can dive to a depth of 7000m is Jiaolong, a Chinese owned research submersible
- 31what is a divergent plate boundarya divergent plate boundary occurs when two tectonic plates move away from each other
- 32what is a convergent plate boundarywhen two plates come together
- 33what is a transform plate boundarya transform plate boundary causes a fault between two plates of the lithosphere, which will slide past one another
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- FlashCards sobre oceanography 1, criado por Andi Hunt em 20-09-2022.
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- Andi Hunt
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