Oceangraphy Chp 1-Intro to Planet Earth
the 4 principal ocean basins on Earth are...
Atlantic, Pacific, Indian, Southern, and Arctic Oceans
based on physical properties, Earth consist of ___ layers
5
oceanic crust is predominantly composed of igneous rock called ___
basalt
One of the reasons that free oxygen in our atmosphere is important to the development and maintenance of life on Earth is because oxygen __
can form ozone and block some UV radiation
although Earth's oceans have existed since early in the formation of the planet, its __ must have changed
chemical composition
the separation of the Earth into layers while it was molten was the result of the ...
differing densities of the elements that make up the Earth
outer core
earth's liquid iron-nickel layer
Asthenosphere
earth's plastic layer which flows when a gradual force is applied to it
Lithosphere
earth's rigid layer that includes the crust plus the topmost portion of the mantle
Mesosphere
earth's rigid layer that includes the middle and lower mantle
inner core
earth's solid iron-nickel layer
continental crust is predominantly composed of the igneous rock called __
granite
the most likely place for the basic building blocks for the development of life to interact and produce life is in Earth's __
oceans
mantle
represents earth's high-density mostly iron-silicate layer
crust
represents earth's low-density mostly silicate layer
Current scientific knowledge indicates that the most likely origin of most of Earth's oceans was due to ...
water vapor released from volcanic outgassing
based on chemical composition, Earth consist of ___ layers
3