Answer:
B. Aerobic bottom water
D. High organic productivity in the overlying oxygen rich water
Explanation:
A Shale is a sedimentary rock usually formed from silt and clay-size mineral. There are different colors of Shale. The Black Shale is formed under anaerobic conditions. This means that oxygen is deficient in the water where the Shale forms.
A little amount of organic materials is required for the formation of Black Shale and because Black Shale is formed in an environment lacking oxygen, an oxygen-rich water would not be necessary for its growth. Sediments are necessary in the formation of Black Shale.
Precise knowledge of location, estimates of size, and general sense of connection between places.
They are the maps in our head, so when you think of a neighborhood or states, you can think of where they are positioned and how to get there
they help navigate areas like the kitchen, states, towns, countries and so on
The three ways in which materials respond to forces:
1.Tension,
2.Compression,
3.Bending.
Explanation:
Tension- The force that is exerted when physical objects come in contact with each other.
Compression- Compression is the application of balanced inward ("pushing") forces to different points on a material or structure.
Bending- A bending force is a force that is applied to a length of material.
The length of an arc rounded to the nearest hundredth is 4.75units
<h3>How to calculate the length of an arc?</h3>
The formula for calculating the length of an arc is expressed as:
L = rtheta
where
r is the radius = AB = 4 units
theta is the central angle = <ABC = 68 degrees
Substitute
L = 4(68π/180)
L = 4.75units
Hence the length of an arc rounded to the nearest hundredth is 4.75units
Learn more on length of an arc here: brainly.com/question/2005046
#SPJ1
C I think , I might b wrong
