no they use seismic waves
A clue that tells geologists about an intrusion is the relationship between the rock layers. An intrusion is younger than the surrounding rocks it cuts through, so if the intrusion appears to cut across existing layers, it is likely an intrusion. Additionally, the mineral composition and texture of the intrusion can differ from the surrounding rocks, providing further evidence of an intrusion.
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/
This job would normally be undertaken by a type of geophysicist known as a seismologist rather than a geologist. For information on how seismologists locate seismic waves, see the related question.
Yes, True!Hey is this one of your questions on a science packet?If so is it called "Exploring Earth's Surface"? Because I have the same packet with the same question on it
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 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?
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!
An indirect question is a statement that conveys a question without using a question mark. It is typically punctuated with a period at the end.
E.g. Bob asked an indirect question.
An indirect question usually ends with a period (full stop). It does not require a question mark because it is not a direct question. For example: He asked if she was coming.
In indirect or reported speech, a question mark is not required at the end of a sentence that reports a question. Instead, a period is used.
an indirect object
Indirect object pronouns answer the question "to whom?" or "for whom?" in a sentence. They represent the person or thing that benefits from the action of the verb.
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.