Answer and Explanation:
About two-thirds of the Earth's surface lies beneath the oceans. The depths of the open ocean were mostly a matter of speculation before the 19th century. Most people thought ocean floor was flat and featureless. In the early 16th century, a few navigators found that the open ocean can differ considerably in depth by taking soundings with hand lines, which shows that the ocean floor was not as flat as it believed.
At the beginning of the 1950s, scientists used magnetic instruments adapted from airborne devices to recognize odd magnetic variations across the ocean developed during World War II to detect submarines. They found that the iron-rich and volcanic rock make up the ocean floor-- contains a strongly magnetic mineral and can distort compass readings. In the early 18th century, this distortion was recognized by Icelandic mariners. Magnetite gives measurable magnetic properties; these magnetic variations help to study the deep ocean floor.
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Answer:
a. perpendicular
Explanation:
A graph shows the lines have opposite reciprocal slopes (rise/run), so the lines are perpendicular.
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Using the slope formula, the slope of the first line is ...
m = (y2 -y1)/(x2 -x1)
m = (11 -6)/(-7 -(-3)) = 5/-4 = -5/4
The slope of the second line is ...
m = (4 -8)/(-4 -1) = -4/-5 = 4/5 . . . . . opposite reciprocal to the first slope
These currents are on the oceans surface and in its depths, flowing both locally and globally.
Answer:
territory, place, region and landscape
Explanation:
The main categories of geographic analysis basic concepts are :
<u>Territory</u> :
The meaning of 'territory' is a delimited space or region. These delimitation occurs across the borders which is either defined by the nature or defined by man.
<u>Place</u> :
It is mainly used by the people who prefers to build the comprehensive conception of Geography. It is defined as a certain area or land that are understood by the human reason. It is a perceived space.
<u>Region</u> :
It is defined as the space or an area which are divided according to specific criterion. It is the normal human elaboration or idea to better understand some certain area.
<u>Landscape</u> :
It is defined as the external configuration of a space. It is the spatial phenomena and manifestation which are apprehended by a human through the senses.
Answer:
it contains the oxygen we need to live
Explanation:
