i. Using fossil evidences
ii. Similar rock lithologies at the edges of continent
iii. Climate clues
iv. Fitting of the continents into a puzzle
v. Sea floor spreading
Explanation:
Pangea was a super-continent on the earth which formed about 330 million years ago during the Paleozoic and began breaking up during the early Mesozoic, about 175 million years ago.
Most of the present day continents formed as a result of the separation of the Pangea in the early Mesozoic.
The first scientist to propose the existence of this super-continent was Alfred Wegener in 1912. He suggested the continental drift hypothesis to explain the separation of the land masses.
Today, the theory has been revised to the theory of plate tectonics which provides a better mechanism to understand the drifting of the continents.
Here are some of the evidences to support the existence of Pangea;
- Using fossil evidences: Mesosaurus, a reptile animal that lived during the Permian, was found in both South America and Southern Africa. Since this animal could not swim nor fly, only a jointed landmass could have made them present in both continents.
- Similar rock lithologies at the edges of continents: rock formations at the Western edge of Africa and South - Eastern part of Brazil matches with one another and have been believed to be once joined together.
- Climatic clues such as glacial tills that are confined to temperate and polar regions have been found in tropical regions.
- Wegener fitted the present day continent into a giant supercontinent and this provided a visual support for his claim.
- Evidences from sea floor spreading revealing magnetic reversals at divergent margins suggests the prevalence of plate tectonics i.e moving plates on earth.
This among many other evidences underscores the existence of a supercontinent called Pangea.
Answer:
Which of the following examples of human environment interaction is an example of modifying the environment rather than just adapting to it?
Building a hydroelectric dam to generate energy
<em>A hydroelectric dam makes changes on the geographical environment by cutting forests, affecting soil properties.</em>
We can mine for them underground
Answer:
A. Making it easier to communicate around the world.
1. Countries who supply foreign aid to the developing world see domestic benefits.
Ex: Foreign aid to the developing world does create a direct cost paid voluntarily through personal remittance or involuntarily through taxpayer funds. When these payments are made, the diplomatic benefits create new trade opportunities between the two nations. Job opportunities become available through the process of monetary transfers. As the basic needs of the developing country are met, there is even the benefit of doing good for someone else to consider.
2. Countries who supply foreign aid help others solve their domestic issues.
Ex: Examples of foreign aid to counter domestic issues include money and supplies to fight HIV/AIDS, law enforcement resources to fight terrorism, military aid through the provision of training to help local police and Army activities, and food support to help farmers find new ways to increase their yields. By improving these issues or processes abroad, the country providing aid prevents them from becoming negative impacts back at home.
3. Countries who supply foreign aid reduce the impacts of poverty.
Ex: . It begins with the fact that almost 11% of the global population lives on less than $2 per day. Providing foreign aid reduces the impact of this issue, along with these other facts.
