Notes, summaries, assignments, exams, and exercises for Geology for Secondary education

1. Weathering and Atmospheric Agents

Weathering is the widespread deterioration and breakdown of rocks caused by atmospheric agents. The resulting fragments are called clasts, which accumulate, often on the slopes of mountains.

Clasts

Clasts are rock fragments of any size and origin.

Causes of Rock Splitting

Rocks are split by atmospheric agents, including:

• Rain and snow
• Temperature changes
• Gelifraction (Frost Wedging): Water freezing in rock fissures, causing them to split.

Definition of Weathering

Weathering is the set of processes caused by atmospheric agents that break down rocks.

2. Weathering Processes

There are three primary types of weathering:

1. Mechanical Weathering

   Physical breakdown of rocks resulting from dilation and contraction, collisions,

Pressure (p) is the ratio of force (F) to the area (S) over which it is applied: P = F / S.

Hydrostatics and Fluid Density

Hydrostatics is a branch of physics that studies fluids at rest. The density (d) of a fluid is its mass per unit volume. The relationship between mass and volume is used to calculate density.

Hydrostatic Equilibrium and Pressure

Hydrostatic equilibrium refers to the pressure within a fluid generated by its weight. The pressure (p) at a point within a fluid is determined by the fluid's density (d), the acceleration due to gravity (g), and the depth (h) of the point: p = dgh. Pressure applied at any point in a fluid is transmitted equally to all points within the fluid.

Surface Tension

Surface tension relates to the strength of...

Community, Biotope, and Ecosystems

Community and Biotope: All the living beings (or people) living in a given area constitute a community or biocenosis. A biotope is the physical medium occupied by a community.

Ecosystem: An ecosystem is the combination of the community (biocenosis) and the biotope.

The Science of Ecology

Ecology is the science that studies the interactions between living beings and others, and between them and the physical-chemical environment around them.

Environmental and Habitat Factors

The habitat of an organism or species is the type of place where it finds the conditions needed to live.

• Biotic factors: These are the factors that arise as a consequence of the presence of other living things, such as food, competition for space,

Materials in a Building

Structure

The strong skeleton of the building, consisting of:

• Cimientos (Foundations)
• Pillars
• Vigas (Beams)
• Forjado (Slab/Flooring)

They can be made of concrete, reinforced concrete, or steel.

Siding

Serves as external protection against atmospheric agents. Consists of: facade walls and the roof structure (steel support on which the roof is constituted).

Partitions

Internal walls or divisions that sort and distribute the interior space. Typically made of bricks and plaster.

Coatings

Applied to floors, walls, and ceilings to provide a finished surface. Consist of materials such as paint or fabrics.

Types of Rocks

Magmatic or Igneous Rocks

Formed by the solidification of molten material from inside the Earth, e.g., Granite.

Sedimentary

Soil Degradation Factors

• Physical: Deterioration occurs due to the breakdown of natural soil structure and porosity.
• Chemical: Degradation happens as crops extract essential minerals from the soil.

Manure Application (Enguanado)

The enguanado process involves incorporating manure into the soil. Common sources include chicken manure for vegetables and goat manure for fruit crops.

Application Rates

Standard application doses typically range between 5 and 15 tons per hectare. Manure is generally applied in a rotation cycle of every 3 to 4 years.

Green Manures

Green manures were introduced as traditional guano supplies dwindled. This method involves adding organic matter derived from annual herbaceous plants, grasses, and legumes.

Vegetable Fertilization

Because...

Physical Properties of Oil

Color: Varies from yellow to reddish-brown. The color darkens with increasing specific gravity, which increases with the percentage of asphalt.

Odor: Varies depending on the amount of light hydrocarbons and impurities. Examples include a pleasant smell of petrol to an unpleasant odor similar to combustion.

Specific Weight: Oil is lighter than water. Its weight is influenced by factors such as the percentage of asphalt.

Viscosity: Depending on the specific gravity and chemical composition, oil can be either very fluid or viscous.

Solubility: Insoluble in water; due to its lighter weight, it remains on the surface. It is soluble in benzene, ether, chloroform, and other organic solvents.

Chemical Properties of Oil

Crude oil...

Key Roles in Construction

The three primary figures involved in construction are:

• Promoter: The person or entity that initiates the building project.
• Architect: The professional responsible for developing the construction project and directing or supervising the works.
• Constructor: The person or entity responsible for the physical execution of the work.

Classification of Construction Materials

Natural Materials

These are used without modifying their original characteristics:

• Stone Materials: Extracted from rocks. They can be compact (e.g., granite or marble) or disintegrated (e.g., pebbles, gravel, or sand).
• Organic Materials: Derived from living matter, most commonly cork, wood, and asphalt.

Processed Materials

These are derived from natural products,...

Earth's Origin and Early History

The Nebular Theory: Origin of Earth and Solar System

The most accepted theory regarding the origin of the Earth is the Nebular Theory. This theory posits that the solar system emerged from a nebulous cloud of gas and dust, likely resulting from the explosion of a previous star.

Evolution of the Primitive Atmosphere

The primitive atmosphere originated from gases released by volcanoes, primarily methane, carbon dioxide ($ ext{CO}_2$), and hydrogen. Initially, the archaic seas were rich in organic substances utilized by early prokaryotes. As these substances became scarce, photosynthetic autotrophs, specifically cyanobacteria, emerged. Their activity led to the impoverishment of $ ext{CO}_2$ and the significant enrichment...

Essential Concepts in Meteorology

Glossary of Atmospheric and Geographic Terms

Solstice

The time when the sun's rays are perpendicular to the tropics.

Climate

Succession regular time rate.

Barlovento (Windward)

Face of the slope that overlooks the sea.

Sotavento (Leeward)

Face of the slope that overlooks the sea.

Gale

Clash of the masses from the poles and the tropics.

Atmospheric Depression

An air mass less than 1015 mb.

Precipitation

The water that falls to Earth's surface from clouds, in liquid or solid form. It is measured with a rain gauge and is expressed in millimeters (mm) or liters per square meter (l/m²). Precipitation is plotted on maps using isohyets, which are lines joining points with the same amount of precipitation.

Atmospheric Pressure

Atmospheric...

The primary elements of a construction include foundations, structures, walls, closing elements, vertical division components, vertical circulation elements, and decks or roofs.

Foundations and Structural Systems

The foundations serve as the basis upon which the building rests. The structure is the set of elements designed to withstand loads and transmit them to the foundations. Key structural elements include pillars, beams, and uprights. The material used for the structure depends on the construction type; for instance, wood, ceramic, or stone are commonly used in low-altitude housing.

Wall Classifications and Functions

Walls are vertical structures that isolate a construction site from the exterior. The arrangement of bricks is referred to as...