Answer:
Certain fossils, called index fossils, help geologists match rock layers. To be useful as an index fossil, a fossil must be widely distributed and represent a type of organism that existed for a brief time period. Index fossils are useful because they tell the relative ages of the rock layers in which they occur.
Answer:
<h3>True</h3>
Explanation:
Topography is a detailed map of the surface features of land.
Answer:
depending on conditions !
Explanation:
e.g a peat bog or somewhere like the north pole vs a humid jungle or hot desert
things to consider
air composition in the environment to feed microbes
temperature to speed up reactions
any natural catalysts
PH of your environment
As true pressure we denote the absolute pressure. <span>
Gauge pressure is the pressure above the ambient pressure </span>(it is zero-referenced against ambient air pressure). Absolute pressure <span> is equal to gauge pressure plus atmospheric pressure.</span>So, according to this the gauge pressure is always less than the absolute pressure.