Answer:
abyssal clay is not an example of biogenic sediments .
Explanation:
Any sediment containing more than 30% of organic matter in it , is called as biogenic sediment or biogenic ooze.
The two most common types of biogenic oozes are calcareous and sileceous.
abyssal clays are the fine grained sediment particles that are settled in the deep ocean basins.
abyssal clay mostly consists of land derived eroded particles and have less than 30% of organic matter in them ,
Hence , abyssal clay is not an example of biogenic sediment.
The hypothesis of continental drift came up in 1910 by German scientist Alfred Wegener. The idea is that when you look at a map south America and Africa seem to fit perfectly together. this would have made one super Continent called Pangaea. so in order for it to get to where it is today something must have happened that is where the idea of floating continents came in. this theory is no longer relevant as now scientists found they would have to adjust to fit the size if both continents. I hope this helps.
Answer:
Earth has two poles North and South they are considered as the two corners of earth.
Explanation:
The imaginary i.e equator or zero degrees, the line divides the equator into two parts of North and South zones named as Poles. Seen as ends of the earth and composed of Positive and Negative physical properties.
Located at a 90 degree to North and South of the geographic equator. Generating magnetic fields. these have formed by the earth rotation and form a part of arctic and antarctic circles cover from 60 to 90 degrees on both the hemispheres.
The poles are a window of earth past, many times also here have been shifts in the history of the earth poles and they have shifted earlier in the north pole was located over Canada, and the south pole was near South America. Alfred Wegener in his plate tectonic theory also mentioned the polar wandering forces.
