Answer: varve analysis
<span>The word varve originated from the Swedish word varv which means revolution in layers and circle. In this particular question, by “varve” we mean an annual layer of sedimentary rocks and varve analysis is the process by which archaeologists can calculate precise dates based on these sediments with known climatic patterns. </span>
Cells, metabolism, reproduction, homeostasis, heredity, etc.
The answer is; B
When the ocean waters in the Pacific ocean warm up and the currents begin to move eastwards towards the Western South American coast, then an El Nino is declared. This phenomenon also shifts tropical storms eastwards due to the exchange of heat between the hydrosphere and the atmosphere. El Nino occurs in a cycle every three to five years.
Answer:
The correct answers are options C, that is, silver tarnishes and becomes black when exposed to oxygen, and option E, that is, diesel fuel burns when it is heated.
Explanation:
Chemical changes refer to the modifications in which the chemistry at molecular level is modified as the initial substance gets transformed into a new and different final substance. This change occurs with the dissociation of old bond and production of new bonds respectively.
I hope this helps. :).
