http://science.nationalgeographic.com/science/earth/inside-the-earth/
This article showcases how life is inside the earth. It includes the Earth's interior and the four layers such as the inner core which is in the centre and is the hottest part of the earth, the outer core which is the layer surrounding the inner core, the mantle which is the widest section of earth, and the last layer of the Earth's interior is the crust which is the outer layer of the Earth. The article seems to be describing those four layers in distinct detail, precisely talking about how wide or long a certain layer is, or the overall explanation as to what the layer is. This article relates to the unit of "Introducing Our Earth" due to the fact that it is quite self-explanatory. It is the introduction of the Earth, providing information on what the Earth's interior is.
http://science.nationalgeographic.com/science/earth/surface-of-the-earth/
This article is also quite self-explanatory. It is called "The surface of the Earth." It shows the in-depth look of our Earth's surface. It includes pictures and information about many topics related to the surfaces of the Earth. For example, it talks about canyons, caves, coastlines, mountains, oceans, plateaus, plains and valleys. The article gives a brief explanation on every topic, as well as portraying a visual aspect by displaying plenty of pictures that will surely enhance the understanding of the information.
http://science.nationalgeographic.com/science/earth/the-dynamic-earth/
This article begins by showing two simple topics. Weathering and erosion, as well as plate tectonics. The weathering and erosion part talks about how Weathering and erosion slowly chisels, polishes, and buff's Earth's rocks into ever evolving works of art—and then washes the remains into the sea. Erosion transports the fragments away. Such pulsing slowly turns stones in the arid desert to sand. Without the erosive forces of water, wind, and ice, rock debris would simply pile up where it forms and obscure from view nature's weathered sculptures. As they grow, so do the cracks, eventually splitting into bits and pieces.The processes are definitively independent, but not exclusive.
http://science.nationalgeographic.com/science/earth/earths-atmosphere/
This article about the Earth's atmosphere included very important points that help the understanding of the Earth's atmosphere. It basically stated how the Earth's atmosphere is more than just the air we breathe. It's also a buffer that keeps us from being peppered by meteorites, a screen against deadly radiation, and the reason radio waves can be bounced for long distances around the planet.This tenuous portion of the Earth's atmosphere extends outward until it interacts with the solar wind. When the sun is tranquil, this layer extends further outward. It contains about four-fifths of the Earth's air, but extends only to a height of about 11 miles (17 kilometers) at the Equator and somewhat less at the Poles. Entering Outer Space Above the mesosphere is the ionosphere.