A mixture<span> of </span>minerals<span> and organic matter in </span>a solid<span> state is </span>called a<span> rock.</span>
Answer:
That´s correct.
Explanation:
The Russian army performed terribly in the battles of the Eastern Front, allowing German and Austrian advances. WWI led to chaos, famine and political agitation in Russia. The czarist government fell in February 1917. The democratic temporary government fell in November 1917. The Bolshevik government signed the disadvantageous Treaty of Brest-Litovsk in 1918. Russia lost one third of its territory and half of its population, and got out of the war.
Answer:
D. Carbon/nitrogen dating
Explanation:
- The geologist uses a variety of the methods to date the ricks and these forms the radiometric dating, and the tree rings, and ice cores. And the radiometric technique is one of the most useful methods to date the rocks in terms of establishing their ages and by the use of the carbon C-14, isotope.
- <u>Some conditions for the dating include the variations in C ratio in the air, isotopic fractionation, and their contamination. As the carbon has an average; the life of about the 40 years, and is 14 is produced in the upper layers of air and the stratosphere by the interaction of the thermal neutrons and the nitrogen atoms.</u>
