Earth layers
sediments
volcanoes
history of oceanography
lat/long
100
how many elements is the core made-up of?
2
100
Pelagic deposits form in what?
deep oceans basins
100
What is a volcano?
a mountain or hill
100
Who were the great sailors and explorers of the Mediterranean?
phoenecians
100
The 0 degree line of longitude that divides the Eastern and Western Hemispheres is..
Prime meridian
200
Where does sea-floor spreading take place?
Mid-ocean ridges
200
Manganese nodules belong to
Hydrogenous sediments
200
How do you know when a volcano is not going to erupt anymore?
When there are no signs of an active magma chamber beneath the volcano
200
Who were the great sailors and explorers of the South Pacific?
polynesians
200
Imaginary lines that run from the north pole to the south pole are..
longitude
300
The plastic, semisolid layer that contains a convection current that moves the plates is called?
Inner core
300
What is the origin of the sediment that this makes?
Hydrogenous
300
Where are the most active volcanoes?
Indonesia
300
Who were the first sailors to reach and settle in Iceland, Greenland, and North America?
vikings
300
Imaginary lines that circle the earth parallel to the equator are..
latitude
400
Large pieces of lithosphere that move around on the asthenosphere are called
Tectonic plates
400
What sediment has the smallest grain size?
clay
400
Has worldwide volcanic activity been increasing recently?
No
400
Who is credited with inventing the magnetic compass?
Arabs
400
how many parts does the equator divide the earth into
2
500
The core is made-up of what two elements?
Iron and nickel
500
Q. This is the largest intact meteorite. If it was broken down into sediment, what kind would it be?
Cosmogenous
500
Why are volcanoes called active even when there is no eruption?
unusual earthquake activity or significant new gas
500
What is the #1 reason people use oceans?
food
500
Zero degrees latitude is also called the _______.
Equator