Notes, summaries, assignments, exams, and exercises for Geology for Baccalaureate

Lithic Industry Materials

Lithic industry materials consist of a set of natural stones used as tools, which are obtained directly from nature. The materials obtained after the first artificial modification of natural raw materials, and the synthetic products obtained totally in the laboratory through chemical and industrial processes at high temperatures, are also part of this field.

Ceramics

Ceramics have high hardness, are durable and resist scratches. They are made from abundant clays that are dried and then baked. Naturally formed clays were the first ceramics used, since they are easy to mold, dry and then bake.

Uses of Clays

Clays are used to produce bricks, tiles, slabs and similar products. Porcelain, pottery, dental prostheses and sanitary...

Ribonucleic Acid (RNA)

Ribonucleic acid (RNA) is a nucleic acid formed by a chain of ribonucleotides. It is present in both prokaryotes and eukaryotes and is the genetic material of certain viruses (RNA viruses). In cells, RNA is usually a single-stranded molecule, although in some viruses the genome is formed by a double-stranded RNA molecule.

Cellular RNAs perform a variety of functions. Some of these molecules direct the synthesis of proteins, since DNA cannot act alone. RNA transfers vital information for protein synthesis, and protein production requires the cell to use its RNA molecules. Several types of RNA regulate gene expression, while others have catalytic activity. RNA is, therefore, a very versatile molecule.

Chemical Composition

DNA (ADN) concepto:

Químicamente, son polinucleótidos constituidos por d-AMP, d-GMP, d-CMP y d-TMP. Los desoxirribonucleótidos que forman el DNA no contienen uracilo ni ribosa, como su nombre lo indica.

Características:

Las células tienen DNA de muy alto peso molecular, de millones de daltons. Por ejemplo, el genoma humano tiene 3x10⁹ pares de nucleótidos. Esto significa que se trata de moléculas de gran longitud: por ejemplo, el DNA del virus de la poliomielitis mide 1,7 µm de longitud y el de la célula humana, en conjunto con todos sus cromosomas, alcanza 2,36 m.

El DNA fue aislado en 1869 por Friedrich Miescher, pero hasta 1950 no se conoció su estructura. Está presente en el núcleo de las células eucariotas, asociado con proteínas...

How Scientists Know What Lies Inside the Earth

Scientists learn about Earth's interior through direct and indirect methods.

Direct Methods

• Mines: Excavation of materials from the surface.
• Drill holes: Boreholes that reach the subsoil. Both of these show that temperature increases with depth.
• Volcanoes: Where magma rises to the surface, providing samples of material from inside the Earth.

These studies allow scientists to examine material from inside the planet and draw conclusions about its interior.

Indirect Methods

• Earth's density: Shows that the interior is made of denser material.
• Seismic waves: Earthquake waves provide information about the internal temperature, composition, and state of the Earth's layers.
• Magnetic field and meteorites: Further

Evolución y Modelos de Democracia

En la democracia directa clásica, la justicia era impartida por un jurado elegido por sorteo (al azar).

Democracias actuales: Con la influencia de la Guerra de Independencia de América y la Revolución Francesa, surge una nueva clase social, la burguesía, que se opone al poder absolutista de los reyes y comienza a demandar mayores libertades y más justicia.

En los Estados democráticos del siglo XX se distinguen:

• Democracias representativas: elegimos a aquellos representantes que nos representarán en los órganos de poder.
• Democracia directa:
  • Referéndum: planteamiento de una cuestión concreta sobre la que los ciudadanos pueden votar.
  • Jurados populares: los ciudadanos pueden ser elegidos al azar para administrar

Inicios cristianos en el norte peninsular

Origen en Cangas de Onís (Covadonga) y la política de Oviedo. El nuevo reino asturiano, con cierta importancia económica y estructura política, se estableció en zonas montañosas, desde donde pudo resistir las incursiones militares de Al Andalus. Los tributos que debían pagar a los emires y el sistema de defensas, que evitaba los castillos, dieron lugar a las razzias de tribus musulmanas en busca de botín, y en el valle del Duero se produjeron frecuentes escaramuzas. Según las crónicas, en Covadonga los mozárabes se convirtieron en un episodio épico y milagroso. La historia política comenzó con Alfonso I, que aprovechó la guerra civil andalusí para realizar razzias, lo que obligó a los

The Urbanization Process

Pre-Industrial Urbanization

Pre-industrial urbanization was driven by strategic, military, political, economic, administrative, and religious factors. The stages of urbanization regarding its origins are as follows:

• Ancient Roots: Before Phoenician and Greek colonization, cities were scarce in Spain. Romanization later led to the foundation of numerous urban centers.
• Medieval Decline and Resurgence: Following the fall of the Roman Empire, Germanic invasions triggered a phase of de-urbanization. During the Middle Ages, development occurred in two distinct spaces: Muslim and Christian.
• Muslim and Christian Territories: The Muslim space comprised almost the entire southern half of the peninsula, while urban life was scarce

Paisaje Vegetal de Clima Oceánico: Eurosiberiano

El paisaje vegetal de la región oceánica o eurosiberiana se caracteriza por el bosque caducifolio, compuesto por árboles de tronco alto, recto y liso, y hojas grandes.

Especies Arbóreas Principales

• Haya: Árbol de montaña que tolera mal el calor y requiere gran humedad. Se adapta tanto a suelos calizos como silíceos; produce madera dura de buena calidad y rápido crecimiento. Se distribuye principalmente en la Cordillera Cantábrica y el Pirineo navarro.
• Roble: Especie que no soporta veranos calurosos y se ubica en altitudes menores. Presenta un crecimiento lento y proporciona madera dura. Se localiza preferentemente en Galicia y la Cordillera Cantábrica.

La Landa y los Prados

• Landa: Vegetación

Composition of Movement

In nature, there are movements in two dimensions. These movements, called compound movements, are the combination of two or more simple movements. To study them, we must:

• Clearly distinguish the nature of each simple component movement.
• Apply the specific motion equations to each component.
• Obtain the equations of motion for the compound movement:

• Position: Obtained by adding the position vectors of the component movements vectorially: r = xi + yj.
• Velocity: Obtained by adding the velocity vectors of the component movements vectorially: v = vxi + vyj.
• Time: The time spent in the compound movement is equal to the time spent in any of the component movements.

Nature of Forces

A force is any action capable of changing the state...

Analysis: Immanuel Kant's Critique of Pure Reason

This analysis examines Immanuel Kant's seminal work, The Critique of Pure Reason. Kant's discourse seeks to understand the nature of reality itself, arguing that human experience is limited and that metaphysical claims beyond experience often lead to misleading knowledge.

The Philosophical Context

Kant addresses the historical tension between rationalism and empiricism. He attempts to resolve this long-standing philosophical conflict by critically examining the limits of human reason. He distinguishes between theoretical reason (what we can know) and practical reason (what we can do and change).

Core Kantian Questions

Kant summarizes his philosophical inquiry into three fundamental questions:

• What