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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Answer:
Parent rock - Limestone
Metamorphic rock - Marble
Explanation: Marble is a metamorphic rock formed from when Limestone undergoes metamorphism, which occurs when they are subjected to high temperature and pressure. They contain calcite and minerals such as Mica, quartz and intergrowth of mineral crystal. They also react with hydrochloric acid. They do not have foliation. Marbles are generally used for sculpting and construction materials. They have an hardness of about 3 on the Mohr scale and feels gritty to touch
Mercury, Venus, earth , Mars, Jupiter, Saturn, Uranus, Neptune, pluto
Remember the saying,
<em>"Give a man a fish and he will eat for a day, teach a man how to fish and he will eat forever"</em>
Well the Gopniks in Russia wrongly translated with saying to: teach a man how to become a fish and he will eat forever. So during the 1970-90s the gopniks all gathered near the lakes in order to satisfy their famine from communist regime. Unfortunately humans can not breathe under water so, fisherman in present day are still recovering bodies from the bottom of these lakes of these gopniks. Thousands still remain in lakes across this nation.
