What facts and knowledge did Eratosthenes have in calculating the size of Earth? There may be more than one. correct answers - The Sun shone directly above a deep well
- He knew the distance between the well and the "slight" shadow
- The Sun cast a slight shadow at some distance from the deep wel...
Oceanography || A+ Guaranteed.
What facts and knowledge did Eratosthenes have in calculating the size of Earth? There may be
more than one. correct answers - The Sun shone directly above a deep well
- He knew the distance between the well and the "slight" shadow
- The Sun cast a slight shadow at some distance from the deep well at the same time
Gravitational force was too weak to retain water correct answers mars
Had the right size and distance from the sun to retain water correct answers earth
Water molecules reached high altitudes and eventually escaped correct answers venus
Darwin was concerned about Lord Kelvin's estimate of Earth's age, because it was too short to
explain the observed diversity of species by his theory of evolution correct answers True
Which true about Venus? correct answers Venus cannot remove CO2 from the atmosphere
without water
Lord Kelvin estimated the age of Earth to be 20-40 million years. Which of the following is true?
correct answers Kelvin estimated how long it would take a molten planet to cool down to the
observed temperatures
The 4.5-4.6 billion year age of Earth is strongly based on the the radiometric dating of meteorites
correct answers True
How many degrees in longitude will Earth rotate in three hours? correct answers 45
Which is true about the planetary surfaces? There may be more than one true statement. correct
answers - Craters on planetary surfaces record past events of meteorites striking the planet
- The Moon has been bombarded with meteorites over time and is covered with craters
Imagine that you set your watch to the Greenwich Mean Time (GMT) in London on Monday. On
Tuesday, you get on a plane and fly to some other location. At your new location, you stick a
pole perpendicular to and into the ground. At the time of day when the stick casts the shortest
shadow, your watch reads 8 am. Your watch is still set to GMT. What is your longitude? correct
answers 60 degrees east
The shadow zone of seismic S-waves indicates that the outer core of Earth is correct answers
liquid
Which of the following was evidence for the continental drift hypothesis: correct answers -
paleoclimatic evidence
- the distribution of glacial deposits
- the fits of the continental edges across the Atlantic Ocean
- the correlation (or findings) of certain fossils across continents
, The fastest traveling seismic waves are: correct answers P-waves
Crust is neither created nor destroyed at which types of plate boundaries? correct answers
Transform
In the mid-twentieth century, oceanographers used what devices to map the ocean floor? correct
answers Echo sounders
Secondary waves are able to pass through which layer of Earth? correct answers Crust and
mantle
Subduction of oceanic plates occurs at plate boundaries where plates: correct answers converge
The boundary between oceanic and continental lithosphere (crust) at a passive margin is marked
by: correct answers the continental slope
Within Earth's mantle, convection cells move lithospheric plates toward ____ and away from
____ correct answers subduction zones; spreading centers
Multibeam echo sounders radiate multiple beams of sound pulses to give a larger coverage
pattern on ocean floors compared to the original single echo sounders. correct answers True
Spreading centers at the Mid-Atlantic Ridge spread at a faster rate than those at the East Pacific
Rise. correct answers False
Passive margins are also referred to as ____. correct answers Atlantic-type margins
What is a typical characteristic of passive margins? correct answers Broad continental shelf
What feature distinguishes a guyot from a seamount? correct answers Flat top
Where is the deepest region in the ocean? correct answers Mariana Trench
Hydrothermal vent fluid is typically above 450°C correct answers false
What are the four main layers of oceanic crust? correct answers sediments, pillow basalts (lavas),
sheeted dikes, gabbros
Which areas of the ocean is most likely to have the least accumulation of sediment? correct
answers Oceanic ridge (MOR)
Most marine sediments are composed of what size of particles? correct answers sand, silt, and
clay
Out of these particles (clay,
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