Answer:
longitude
Prime Meridian
Explanation:
The meridians are imaginary lines created by the humans. They are measured in longitude, or rather longitudinal degrees. These lines run from north to south, and all of them merge at the North and South poles, while as they get toward the lower latitudes they are further apart from each other. The longitude is measured east and west from the Prime Meridian, also called Greenwich. The Prime Meridian is the longitude with value of 0 degrees, and everything east or west from it has certain longitudinal value between those 0 degrees and 180 degrees. The meridian that is located on the opposite side of the planet from the Prime Meridian is also the International Date Line, running through the Pacific Ocean, and being the ones form where the time starts to be counted.
The best answer would be A. C<span>lear, distinct horizons with organic matter and mineral nutrients is a characteristic in a land that is to be used for farming. A healthy soil is an essential when planting crops thus it should have ample amount of organic matter and nutrients.</span>
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.
