Answer:
Explanation:
Clastic sediments or sedimentary rocks are classified based on grain size, clast and cementing material (matrix) composition, and texture. ... An example of clastic environment would be a river system in which the full range of grains being transported by the moving water consist of pieces eroded from solid rock upstream.
Answer:
Cohesion means sticking together
Explanation:
Easy. Answer is oxygen because it says which one was missing before any life was on earth. And in order to have life on earth you need oxygen!
:)
Positron Emission Tomography scan of the brain of cocaine addicts showed that the drug affects how the brain use glucose. Cocaine users' brain cannot use glucose efficiently and there are also reduced metabolic activity in other areas of the brain.
