Answer:
A. True
Explanation:
Oceanic crust, while older than plateaus of rocks found far away from volcanic activity, it is much thinner, denser, younger, and of different chemical composition than continental crust. Continental crust is typically 30-50 km thick, whilst oceanic crust is only 5-10 km thick. On the other hand, plateaus of rocks are formed from volcanic activities and are of more recent occurrence than oceanic crust.
Answer:
If the duration of life on Earth was on a scale of 20,000 days, the human species would be present in the Earth for approximately 9 days.
Explanation:
We can't be sure about the exactly age of the Earth, but we can base our calculus in a number between 4400 and 4600 million years, because the most accepted researches shows numbers in this span of time. We can take the average of those limits: 4500 million years.
On another hand the presence in the Earth of human species has not a precise date because of the it does not have a precise date for two main reasons, the scientific evidence does not include all the human species that existed on Earth but it is a very incomplete evidence and besides being an evolutionary phenomenon it is not easy to determine from what moment We can consider that a species belongs to the human race or not. In any case, we take the approximate date of the scientific evidence of the existence of human species in an age of 2 million years.
With both numbers we can calculate the proportion in the scale of 20 thousand years throw the following formula:
PHS = 20000 years . 2 million years / 4500 million years = 8.9 years
PHS: Presence of Human Species
Answer: Look at the explanation below
Explanation: While most of Latin America speaks Spanish, in Haiti, people speak French and Brazil, people speak Portugese. Both nations played a role in getting their independence. Also, the fact that both French and the Portugese exported slaves from West Africa to the West Indies which is what we call the Carribean today.
Hope this clarifies your question.
In urban areas, there are more people, therefore not a lot of farmland. (that eliminates C) If city buildings don't allow flood waters to recede, that could be dangerous in many ways. (So A is still a reasonable answer) If most cities are built in flood zones, there should be some form of shelter if houses aren't safe. Pollutants and diseases being carried in water are already dangerous, but easier to spread with rapid flood waters that are sweeping everywhere. So your best answer would be either A or B.
Answer:
<u>D. Earth's rotation</u>
Explanation:
- The Coriolis force, cause distinct pressure zones between the equator and the poles due to the spinning of the earth on its axis. This force directs the winds on the right side in the northern hemisphere and directs them in the left side in the southern hemisphere.
- This force is the cause and consequence of the earth's internal inertia. Friction force causes it to be actively seen in motion. Compared to other force Coriolis force is smaller and it only deflects the pressure pattern in north and south spheres.
- Horizontal deflation is grater near the poles, and less away from poles. The named is given after a French mathematician and physicist Gaspard-Gustave de Coriolis.
