Answer:
Oceanic, Seafloor Spreading, Submarine Volcanic, Rift Valleys, Great african
Explanation:
DIVERGENT PLATE MARGIN (Also known as a constructive boundary or an extensional boundary)
Here two plates moves __away__________from each other. Molten rock, or magma, immediately rises to fill any possible gap and forms new <u>oceanic</u> crust. When this happens underwater, it is described as <u>seafloor spreading</u>. Huge underwater <u>submarine volcanic</u> ranges are formed from magma coming up from the mantle. Over time these submarine volcanoes may become large enough to reach the surface .eg. Iceland in the North Atlantic Ocean.
Where plates move apart on land, <u>rift valleys</u> are formed. An example of this is the <u>Great African</u> Rift Valley.
Answer: b) earthquake activity
Options:
a) earth's density
b) earthquake activity
c) volcanic activity
d) atmospheric composition
Explanation:
Earthquake activity
: Seismic waves are responsible for the earth trembling during earthquakes. An earthquake occurs as seismic waves travel through the interior of Earth’s surface. A seismograph measures the characteristics of these waves such as how fast they travel as well as their strength.
By studying these attributes in different places, scientists come to understand the makeup of earth’s internal structure. The type of seismic waves most important to this study are body waves which travel through the earth’s interior
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Gneiss. It is a high grade metamorphic rock, having been subjected to higher temperatures and pressures than schist. It is formed by the metamorphosis of granite, or sedimentary rock.
<span> Northwest Territories, the Yukon, and the Nunavut.
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Gold is plentiful in Africa and is a necessity for most technological devices.
