Ecosystems: Definition, Types, and Functioning
Ecosystems: Definition, Components, and Interactions
An ecosystem is a partially constituted physical environment, or biotope (such as a forest, pond, or prairie), and the organisms living in it, the biocenosis (including snakes, grass, lions, etc.). These components interact through a continuous flow of energy and matter.
Biosphere and Interactions
The biosphere is the part of the planet where life exists. It is a large, integrated ecosystem encompassing all of Earth.
- Biotope-Biocenosis Interactions:
Cold War: Peaceful Coexistence & Internal Bloc Conflicts
The Years of Peaceful Coexistence
The First Signs of Thawing
The new Party Secretary General, Nikita Khrushchev, publicly denounced the mistakes and crimes of Stalinism. A decolonization process was launched. Congress approved new directives, such as not exporting revolution and the possibility of accessing multiple paths to socialism, and also tested the dissolution of Kominform. In the United States, Republican President Eisenhower was re-elected. The government was left to anticommunist radicals,
Read MoreEmployee Representation and Collective Agreements
Employee Participation in the Company
Employees can participate in the future of the company through representatives they elect. Employee representation can be achieved through unitary representation (staff delegates and the works council) or collective representation (unions).
In order to exercise their right of participation, employees of the same company or workplace have the right to meet in assembly, if conditions permit, and outside working hours.
Guarantees for Employee Representatives
- Priority
Phrasal Verbs and Vocabulary for Travel
Phrasal Verbs: Travel
- See you off: Go to a traveling station to say goodbye to someone.
- Set off: Begin a journey.
- Pick you up: Go somewhere to collect someone.
- Drop me off: Stop for someone to get out of a car.
- Take off: Leave the ground and begin to fly.
- Check in: Register as a passenger at an airport.
- Stop over: Break a journey to stay somewhere, especially when traveling by air.
Travel Vocabulary
- Crossing: A journey to cross water.
- Excursion: A short journey made by a group of people for pleasure.
- Trip:
Factors of Production, Economic Activity, and Exchange
Factors of Production
Resources, also known as factors of production, are inputs used in the production of goods and services. The three primary factors of production are land, labor, and capital, with some economists including entrepreneurship as a fourth factor.
Land
Land encompasses not only farmland but also all natural resources from the ground and sea, such as minerals.
Labor
Labor refers to the physical and intellectual capabilities of human beings involved in the production process. Workers transform
Read MoreUnderstanding Perception: Illusions, Constancies, and Reality
Closure in Perception
Closure is the tendency to perceive incomplete figures as complete. We “close” or fill in the missing parts to see a whole.
Continuity in Perception
We tend to group or separate stimuli to maintain a harmonious continuity.
Perceptual Constancies
Although objects constantly change in position, distance, and color, we perceive them as stable and unchanging.
Form Constancy
The tendency to perceive that objects have the same shape despite changes in their position.
Size Constancy
When viewing
Read MoreSpain’s Tourism Evolution and Current Landscape
Item 18: Tourism
1. The Development of Tourism in Spain
The history of tourism in Spain goes back to the arrival of Roman travelers in the 19th century, who saw Spain as a topical and exotic country.
The beginnings of modern tourism are in the 1950s. In 1960, the number of visitors exceeded six million, and this growth continued until 1973. From 1960 to 1973, the foundations of the Spanish mass tourism model were laid, which required the construction of apartment complexes and hotels.
The expansion
Read MoreUnderstanding Key Economic Concepts and Indicators
Business Cycle Phases
The business cycle consists of several phases:
- Boom (Expansion): A period of rapid economic growth.
- Contraction/Recession: A period of economic decline.
- Depression: A prolonged and severe recession.
- Crisis: A sharp downturn in economic activity.
These phases are influenced by factors such as aggregate demand.
Understanding Inflation
Inflation is defined as a continuous and widespread increase in the price level from one period to another. This means that the prices of most goods and
Read MoreAuguste Rodin’s The Thinker: Symbolism and Context
The Thinker (Le Penseur) by Auguste Rodin, created between 1880 and 1900, stands as an iconic sculpture of French Impressionism.
Technical Elements
This bronze sculpture, cast at the Rodin Museum foundry in Paris, showcases Rodin’s unique technique. He intentionally left the mold for the base unfinished, creating a rough texture that emphasizes the manual process. This roughness adds strength and power to the sculpture’s form.
- Material: Bronze
- Location: Rodin Museum, Paris
- Style: Impressionism
Formal
Read MoreSpanish Urban System: Structure and Dynamics
Spanish Urban System (SPNL)
The Spanish Urban System (SPNL) relates to cities and their surroundings by creating other city systems, particularly in cities that have experienced significant changes.
Characteristics
The urban system is constituted by a set of interrelated cities.
Urban System Parts:
- Size: A rule is established according to size range, assigning each city a tidying range based on its population. In Spain, the largest urban agglomerations (over 500,000 inhabitants) are considered. Madrid