B.around rivers and lakes
So they can have a source of food and water
Answer:
<u>scientist general conduct test and analysis by experimenting data that leads to formation of hypothesis for the study.</u>
Explanation:
- A hypothesis is an explanation of the phenomenon and for a hypothesis to be scientifically true it must be tested as generally based on observations, which is an unproven phenomenon in which needs to be testes first and the explanation in terms of facts or figures are thus a part of the data.
- A hypothesis relies on the prediction and suggestions of facts while a theory is supportive of the evidence. Hense a theory has to be accurate and not an experimental basis.
- Thus it will be considered as a hypothesis as to its more subjective explanation and a work in progress.
Answer:
i.
The passive continental margins are formed under divergent plate boundary setting. These are aseismic (less seismic) and often referred as the Atlantic-type margins having a distinct transition zone between the continental and oceanic crustal regions.
ii.
The active continental margins referred as the Pacific-type margins are the zones of seismically active convergent plate boundaries. These are characterized by subduction zones formed under variety of settings such as oceanic–oceanic, oceanic–continental, etc. and are mostly observed along the periphery of the Pacific Ocean.
iii.
Transform continental margins (sheared margins) are formed due to lateral plate movements or shearing motions during the continental breakup process in the divergent margin setting. Identifying this category of margins is also in a way important, as they represent an original offset in the line of continental breakup and can normally be traced laterally into an oceanic fracture zone (Bird, 2001). Further, transform margins are also noticed along the Pacific type continental margins.
Explanation:
hope that it will help u
Answer:
The most recent eon is subdivided into three eras and eleven periods.
Explanation:
The geological time scale has been constructed so that it can help in better research and understanding of the past, as well as making it easier to distinguish the past and its characteristics at a certain time. There are larger and smaller divisions in the geologic time scale, with the eon being the largest unit, followed by era, and then period.
The most recent eon is the Paherozoic, starting from 542 million years ago and still going on. It is subdivided into three eras and eleven periods so far. The three eras are:
- Paleozoic
- Mesozoic
- Cenozoic
The eleven periods are:
- Cambrian
- Ordovician
- Silurian
- Devonian
- Carboniferous
- Permian
- Triassic
- Jurassic
- Cretaceous
- Tertiary
- Quaternary
Ozone and oxygen molecules in the stratosphere absorb ultraviolet light from the Sun,which prevents radiation from passing to the Earth's surface.
