A narrow valley between hills or mountains, typically with steep rocky walls and a stream running through it.
The correct answer is - 2.1 cm per year.
In order to get to the result of how much the African plate has been moving annually over the last 100 million years, we should first turn the kilometers into centimeters:
1 m = 100 cm
1 km = 1,000 m
1,000 m = 100,000,000 cm
2,1 x 100,000,000 = 210,000,000 cm
We got to the result of 210 million cm of total movement. Now we have to divide the number of cm with the number of the years in which the plate has moved that much, which is 100 million:
210,000,000 / 100,000,000 = 2.1 cm
So we get a result of an average movement of 2.1 cm per year pf the African plate during the period of 100 million years.
The correct answers are:
<em>A. Lava destroys homes and farmland;</em>
The lava flows can not really be stopped, so what they manage to reach will be destroyed, homes and farmlands on its way included.
<em>D. Ash and dust fill the air and reduce sunlight;</em>
A strong and violent volcanic eruption will release lot of ash and dust, and that will for sure affect the atmosphere, especially in close proximity to the volcano, which will reduce the sunlight, and make the climate colder.
<em>E. Organisms and populations on the wildlife preserve die;</em>
The lava flows, pyroclastic material, poisonous gases, ashes, will all contribute to death to every living organism that will not be able to escape on time, be it humans, animals, or plants, they will all die.
Answer:
Rotation" refers to an object's spinning motion about its own axis. "Revolution" refers the object's orbital motion around another object. For example, Earth rotates on its own axis, producing the 24-hour day. Earth revolves about the Sun, producing the 365-day year.
The statement which best describes the connection between population distribution and natural disasters is, Natural disasters occur most often near bodies of water, which is where large concentrations of a population are often located.
Answer: Option A
<u>Explanation:</u>
Year after year, mankind is becoming more and more vulnerable to natural disasters. The main cause of this is mostly, the ever increasing population growth and globalization.
Urbanization and the increase in population distribution gives rise to the vulnerability of natural disasters. Almost 80% of the U.S. population are inhabitants of urban region, this results in an increase population in coastal regions, and such areas are often prone to flood. With more and more people residing to such areas, the chances of natural calamities also increases.
