no they use seismic waves
Give relative ages of rocks. This is not the only clue to this question
There are many forms of earth science, and therefore many names for those who study aspects of earth--geologists, geophysics scientists, ecologists, hydrologists, sedimentologists, and more.
Your question is kind of broad since geology is comprised of such a wide spectrum of careers, but here are a few of the most renowned geologists in history: James Hutton - http://en.wikipedia.org/wiki/James_Hutton Charles Lyell - http://en.wikipedia.org/wiki/Charles_Lyell Alfred Wegener - http://en.wikipedia.org/wiki/Alfred_Wegener Here's a list of other famous geologists: http://en.wikipedia.org/wiki/List_of_geologists The majority of work that geologists perform today is based on the discoveries of these people. There are many different jobs that geologists perform today, but I'd say that the "best" geologists of today are those who dedicate their lives to the study of environmental sustainability and the prediction/prevention of geologic hazards. Geologists involved with the oil industry are generally the highest paid in the field, but some may not consider these to be the "best" geologists because of their affiliation with oil companies and how detrimental they are to the environment. Many of the best geologists today work for the U.S. Geological Survey (USGS). http://www.usgs.gov/
The evidence is in the related question below. The critical evaluation you have to do yourself.
The pieces of evidence Alfred Wegener used to support his theory about continental drift were; Puzzle Fit, Fossil evidence from animals that were once on the same continent, geologic evidence like mountain chains that were connected and now split apart, and ice sheets. Thank you for reading this article and I hoped it answered your question!
We would need to know the circumstances to answer this question.
No, indirect questions do not require question marks.
An indirect question should be followed by a question mark (i.e., ?) the same as any other question. Direct: Where does he live? Indirect: Do you know where he lives?
An indirect question is typically followed by a period (.) rather than a question mark (?). This is because the sentence is structured as a statement rather than a direct question.
Earthquakes occur frequently. They create different types of waves that travel through the earth at a variety of speeds. Certain waves are also reflected and refracted by some materials. As a result it is possible to tell where boundaries are between two different types of materials. By knowing the speed the various waves travel through the various materials, it is also possible to know the density of various materials. Geologists know the material ejected by volcanoes of various types. The density in the center of the earth is the same as a mixture of iron and nickel. Just above the center of the earth is heavy material, but is a guess!
E.g. Bob asked an indirect question.
Hereunder several example of the employ of "direct" as an adjective: direct consequence, direct descendant, direct action, direct discourse or speech (British), direct evidence, direct cost. You can also use it to mean: frank, open, sincere; a direct answer, a direct way of doing things. "Direct" as an adverb: I shall write to you direct, the train goes direct to Boston . Several examples of the employ of "indirect" as an adjective: an indirect route, to make an indirect reference, to answer a question in an indirect way, indirect cost, indirect object, indirect discourse or speech (British).
an indirect object
A period.
Direct and Indirect
It's unusual for a number to be used as an indirect object, but it can be done. For example, "Give the three of them the answer to question #7." In that sentence, "three" is the indirect object.
Give relative ages of rocks. This is not the only clue to this question