(light brown) Next, fossil-rich sedimentary rocks were precipitated.
These rocks are tilted due to deposition on the non-horizontal surfaces of primitive rocks.
Assembling a collection of family photographs became a popular tradition.
This is the easiest of early photographs to identify.
The image was developed on a very thin sheet of paper, and then was glued to stiff card stock.
The latest high-tech equipment permits reliable results to be obtained even with microscopic samples.
Radiometric dating is self-checking, because the data (after certain preliminary calculations are made) are fitted to a straight line (an "isochron") by means of standard linear regression methods of statistics.
There are so many different debate topics, that can be used in your debate club or for yourself to practice debate, that it is usually hard to find the one topic that you would like to try.