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

Classifying Energy Sources

Non-Renewable Energy

Energy sources available in limited quantities that are consumed much faster than they form.

Fossil Fuels

• Coal: A mineral fossil fuel originating from the decomposition of buried plant matter, accumulated over millions of years. Today, it's primarily used as fuel to produce thermal energy.
• Oil: A thick, dark, oily liquid formed from the decomposition of plant and animal remains buried for millions of years. It has a high calorific value, is relatively easy to extract and transport, and is used to generate electricity and produce materials like plastics and paints.
• Natural Gas: Has a similar origin and formation process to oil, often found together in deposits (jaciments). It's used as fuel or as a feedstock

Central Thermal Operation

Central carbon fuel is stored as the mine reaches and moves up the hopper, where a mill grinds it down to dust. This dust is mixed with preheated air and enters the boiler. If the fuel is stored in tanks, it is heated before driving to the boiler. If the power station uses gas, it passes from storage tanks to the boiler, pre-heated.

In the boiler, burning the fuel produces heat energy, which is converted to steam. Water circulates through tubes surrounding the furnace walls. The steam reaches the turbines. The shift of the turbine blades is transmitted to the generator rotor, producing electrical energy. As tension rises, transformers step up the voltage, and the energy is then transported to consumption points via high-...

Divergent Plate Boundaries

Mid-Ocean Ridges

Mid-ocean ridges are high elevations located in the middle of all oceans, with a total length of about 65,000 km. Some peaks of the ridges protrude above sea level, forming volcanic islands. The central part of the ridge consists of a system of fractures that form a large groove called the rift valley. The ridges are crossed by numerous transform faults.

The Genesis of an Ocean

The formation of a ridge (dorsal), and therefore a new ocean, under a continent begins when a hot spot appears. Hot magma from the mantle rises, slightly lifting the lithosphere and forming a dome. The rigid lithosphere then breaks, forming a system of three cracks called a triple point. These cracks, called rifts, continue to...

Nuclear Thermal Power Plants

In nuclear thermal power plants, the traditional thermal power boiler is replaced by a nuclear reactor. Water vapor pressure occurs due to the heat generated by the fission (splitting) of the atomic nuclei of radioactive elements, primarily uranium. The uranium isotopes U-235 and U-238 are most commonly used.

The capacity of nuclear power plants installed in Spain includes the 466 MW Santa María de Garoña plant and the 1,087 MW Vandellòs II plant in Tarragona. The main advantage of nuclear power is its high energy production capacity. Its drawbacks include the management and storage of radioactive waste, as well as public concern regarding potential nuclear accidents.

The Problem of Waste and Pollution

• Non-nuclear

Understanding Energy Sources

Natural elements that can be transformed into energy—such as water, wind, coal, oil, and gas—are known as energy sources. These resources are utilized to produce heat, light, and movement.

Forms of Energy

The most significant forms of energy include:

• Mechanical
• Thermal
• Nuclear
• Chemical
• Radiant and Sound

Classification of Energy Sources

Energy sources are classified based on their origin:

• Primary: Found directly in nature (e.g., wind, water, sun, wood, coal, oil).
• Secondary: Obtained from primary sources (e.g., electricity, gasoline).

Global Consumption Breakdown: Oil 49%, Natural Gas 21%, Coal 13%, Uranium 11%, Renewable 7%.

Renewable Energy

Renewable energy comes from sources that replenish naturally within a short period...

Solar Radiation and Its Impact on Earth

The energy produced in the interior of the Sun is emitted in all directions into space. This is solar radiation. The closer a planet is to the Sun, the greater the quantity of energy it receives.

Earth's Atmospheric Layers

• Troposphere: The lowest layer. It contains most of the atmospheric gases. Clouds and all meteorological processes occur in this layer.
• Stratosphere: Contains the ozone layer, which absorbs ultraviolet rays.
• Ionosphere: A thin layer (up to 600km).
• Exosphere: Gradually transitions into outer space; there is no sudden change.

Albedo and Absorption

Albedo is the portion of solar energy that is immediately reflected back into space and does not heat the Earth's surface. Another part of the solar...

Major Geological Processes: Erosion, Transport, and Deposition

Erosion: Material Evacuation and Relief Modeling

Erosion is the evacuation of material by geological agents, resulting in the wear of reliefs and karst modeling.

Effects of Erosion

• Evacuation of Debris: Fragments of rocks or clasts produced by weathering.
• Modeling Land Surface Characteristics: Geological agents move rock clasts, producing specific relief forms.
• Peneplain Formation: Large, virtually flat areas resulting from extensive erosion.
• Redistribution of Continental Masses: Erosion, sediment transport, and subsequent deposit in sedimentary basins cause weight loss in mountainous areas.

Transport: Conveyance of Geological Materials

Transport is the conveyance of materials by geological...

Understanding Diverse Forms of Environmental Pollution

Pollution isn't solely caused by the emission of substances into the atmosphere. Subtle forms of atmospheric pollution are also produced by various energy sources.

Noise Pollution: Understanding and Mitigation

Noise pollution, caused by excessive sound, has a significant impact. In Spain, for instance, the acoustic comfort level is set at 55 decibels. How can we combat this type of pollution?

• Installing noise barriers.
• Implementing insulation in walls, often using double glazing.
• Strategically choosing the quietest areas of the home for rest.

Light Pollution: Impact of Artificial Night Lighting

Light pollution is primarily caused by excessive or misdirected artificial lighting at night, disrupting...

Localitation:

• Amazon
• Congo
• Indonesia

Temperature:

• High around 25º all months
• Hot weather

Spaciouness:

• Low temperature
• Less than 3º

Precipitation:

• High and regular more than 2000 mm

Vegetation:

• Rainforest
• Central Africa
• India
• Central America
• Surrounds the Equatorial climate

Temperature:

• High more than 20º all months
• Hot weather

Spaciouness:

• A few between (3º-10º)

Precipitation:

• Irregular, two seasons: summer and Winter
• High 1000 mm
• More than 2000 mm

Vegetation:

• Tropical Gallery Forest
• Sahara
• Kalahari

Temperature:

• High temperature
• Average temperature higher than 20º

Spaciouness:

• Big spaciouness termal
• Differents
• Day/night
• Summer/winter

Precipitation:

• Low (< than 200 mm)
• Irregulars

Vegetation:

• Just Oasis

Localitation:

• Occidental Europe
• South Coast of Chile
• West of Canada
• New Zealand

Temperature:

Understanding Key Earth and Space Concepts

Leap Year

A year with an additional day at the end of February, occurring every 4 years.

Orbit

The elliptical movement of the Earth around the Sun.

Cold Zones

Thermal zones where the Sun's rays strike the surface at a wide angle, resulting in low temperatures.

Temperate Zones

Thermal zones where the Sun's rays strike the surface at a moderate angle, resulting in mild temperatures.

Tropical Zones

Thermal zones where the Sun's rays strike the surface nearly perpendicularly, resulting in high temperatures.

Tilt

The inclination of the axis of rotation.

Cardinal Points

Basic reference points that allow us to find our location on Earth: North, South, East, and West.

Rotation

The movement of the Earth around its axis. Consequences...