Geologists can determine the actual age of features on a planet by the radiometric dating method in which the age of the rocks is calculated by the natural decay of the radioactive isotopes of elements such as carbon.
In the radiometric dating method, the radioactive minerals in rocks are used. The radioactive isotopes, which are the chemical elements, naturally break down and decay to form a new isotope.
Each radioactive element has a unique decay rate which is known. Hence, the radioactive isotopes are crucial for the geologist to compare and identify the age of the rocks and furthermore, the planet.
To learn more about here isotopes here
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The Great Lakes region of Canada is dominated by the manufacturing industry. The Canadian Great Lakes coastline is located entirely in Ontario. The main source of income for Ontario is the industry.
Explanation:
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At EVERY point on Earth . . . North of the equator, South of the equator, at the poles, or exactly ON the equator . . . the lengths of days and nights change with the seasons. (probably supposed to be <em>choice-3</em>)
The land of the earth is divided onto seven continents. continents are larger than a island and usually made of multiple countries. the 7 continents are Asia, Africa, North america, South america, Europe, Australia and Antarctica.