Human Body, Energy, Spain, and History Facts
What is an Ecosystem?
An ecosystem consists of living things in a specific environment and the relationships between them and their habitat.
The Musculoskeletal System
The musculoskeletal system consists of the bones and cartilage (all the bones in the body) and the muscles (all the muscles in the body). Joints are the places where two bones meet or join together.
The Nervous System
The nervous system has two parts: the central nervous system (the brain and the spinal cord) and the peripheral nervous
Read MoreAsturias, León, Navarra, Aragon & Catalonia: Origins
The Kingdom of Asturias (718-910)
The Kingdom of Asturias emerged in 718 when the Visigoths in Cantabria elected Pelayo as their king. They defeated the Muslims at the Battle of Covadonga in 722. The Asturian kings gradually expanded their territory: by 800, the kingdom stretched from Galicia to Álava. By the 10th century, Alfonso III occupied the Valley of Duero. The capital moved from Oviedo to León, and the region became the Kingdom of León.
The Formation of Navarra, Aragon, and Catalonia
The
Read MoreContinents: Geography, Mountains, and Key Features
Continents: Geography and Key Features
Africa, the third largest continent, is surrounded by the Atlantic Ocean (West) and the Indian Ocean (East). It is separated from Europe by the Mediterranean Sea and from Asia by the Red Sea. The continent is mainly flat, with an average altitude of 750m, and features many plateaus. Major mountain ranges include the Atlas Mountains (North-West) and the Drakensberg Mountains (South-East). The Great Rift Valley (East) is a long valley formed by a geological fault,
Read MoreThe Second Industrial Revolution: Innovations, Impact, and Expansion
The Second Industrial Revolution: Population Growth and Migration
The improvement of hygiene and healthcare, along with medical advancements, facilitated a new phase of European population growth. Discoveries in medicine helped to stop major epidemics in Europe, and the decline in mortality from infectious diseases, caused by a decrease in infant mortality, led to an increase in life expectancy. This drop in mortality resulted in a European population explosion.
This population growth was not accompanied
Read MoreArgentina: Geography, Climate, and Regional Analysis
General Information About Argentina
- Area: 2,780,403 square KM
- Population: Approximately 36,000,000
- Capital: Buenos Aires, with over 10 million inhabitants
- Location: Two ways to locate a point on Earth: geographical location using cardinal points, and astroman location based on latitude and longitude.
Argentina is located in the southeast of South America, bordering Uruguay, Brazil, Paraguay, Bolivia, and Chile. It lies between 22° and 55° south latitude, placing much of its territory within the temperate
Read MoreIndustrial Revolution: Causes, Energy, and Production
Causes of the Industrial Revolution
Population Increase: Since the eighteenth century, plague epidemics were disappearing, and the development of agriculture allowed for the growth of food production, leading to a significant decline in mortality.
- European mortality, including infant mortality, declined.
- The birth rate decreased slowly but remained high, resulting in a considerable increase in vegetative growth.
- The population increase was greater in the cities. There were also migrations, especially