Low dissolved oxygen concentrations that occur in many bodies of water when nutrients stimulate the growth of algae that subsequently die and are decomposed by oxygen-using bacteria.
1) heat from radioactive decay in the core of the Earth heard the mantle.
2) Plates move averagely only a few cm a year, this has been happening ever since the planet formed and cooled to give a thick crust so this movement has added up over many years to move plates far from where they started.
3) because the mantle is heated and is able to flow slowly, convection currents are set up which cause the plates on the crust to move.
Answer:
C. occurs when many atomic bonds are broken quickly and rock pieces separate.
Explanation:
Planet earths Brittle deformation occurs when many atomic bonds are broken quickly and rock pieces separate.
This brittle deformation occurs when rocks along active plate boundaries are subjected to physical stress such as change temperature which causes their atomic bonds to break and the rock becomes shattered, this is termed brittle deformation.
There is also ductile deformation in rocks
