The age of the fossil must be determined so it can be compared to other fossil species from the same time period.
Dinosaur bones, on the other hand, are millions of years old -- some fossils are billions of years old.
To determine the ages of these specimens, scientists need an isotope with a very long half-life.
Dating is a technique used in archeology to ascertain the age of artifacts, fossils and other items considered to be valuable by archeologists.
There are many methods employed by these scientists, interested in the old, to get to know the age of items.
But this sediment doesn't typically include the necessary isotopes in measurable amounts.
Fossils can't form in the igneous rock that usually does contain the isotopes.(1) carbon dioxide and methane (2) oxygen and nitrogen (3) hydrogen and helium (4) ozone and chlorine The average temperature at Earth’s North Pole is colder than the average temperature at the Equator because the Equator (1) receives less ultraviolet radiation (2) receives more intense insolation (3) has more cloud cover (4) has a thicker atmosphere On a certain day, the isobars on a weather map are very close together over eastern New York State.To make the people of this area aware of possible risk to life and property in this situation, the National Weather Service should issue (1) a dense-fog warning (2) a high-wind advisory (3) a heat-index warning (4) an air-pollution advisory A strong west wind steadily blew over Lake Ontario picking up moisture.The most widely known form of radiometric dating is carbon-14 dating.This is what archaeologists use to determine the age of human-made artifacts. The half-life of carbon-14 is only 5,730 years, so carbon-14 dating is only effective on samples that are less than 50,000 years old.(1) 110 million kilometers (2) 220 million kilometers (3) 390 million kilometers (4) 850 million kilometers A cycle of Moon phases can be seen from Earth because the (1) Moon’s distance from Earth changes at a predictable rate (2) Moon’s axis is tilted (3) Moon spins on its axis (4) Moon revolves around Earth Compared to Earth’s crust, Earth's core is believed to be (1) less dense, cooler, and composed of more iron (2) less dense, hotter, and composed of less iron (3) more dense, hotter, and composed of more iron (4) more dense, cooler, and composed of less iron An environmental scientist needs to prepare a report on the potential effects that a proposed surface mine in New York State will have on the watershed where the mine will be located.