Earth’s Structure, Plate Tectonics, and Earthquakes
Earth’s Structure
The materials that make up the planet are arranged in layers according to their densities: atmosphere, hydrosphere, crust, upper and lower mantle, and outer and inner core.
Plates
A plate is a rigid structure, called the lithosphere, which contains rock materials of the upper mantle and crust, both continental crust and the oceanic crust. These lithospheric plates have a thickness of about 100 km and float on the mantle.
The continuous movement of the plates is due to the existence
Read MoreGlossary of Hydrological and Vegetation Terms
River
Natural water current, continuous and more or less abundant, which flows into another river, a lake, or a sea.
Drought
Period during which a stream of water reaches its lowest flow.
Flood
A moment of maximum river flow, which is usually an abnormal increase with catastrophic effects.
Nival Regime
Fluvial type of rivers whose flow is determined by the input of water from melting snow. Corresponds to mountain rivers that reach their maximum during the spring thaw, and their minimum in winter when water
Read MoreUnderstanding Precipitation, Runoff, and Groundwater Systems
Precipitation
Changes in air pressure and temperature associated with the movement of air masses cause air to become saturated with water vapor. This vapor then condenses around tiny particles in the air, such as pollen, dust, sea salt, and volcanic ash, leading to precipitation.
Main Controls of Atmospheric Precipitation:
- Collision of Air Masses: Most precipitation occurs when large masses of warm, moist air collide with cold air masses, such as in cyclones and hurricanes.
- Convection: Heat from the
Air Pollution: Sources, Effects, and Solutions
AIR
Air is a set of gases that form the atmosphere, essential for life on our planet. It is a natural resource in constant exchange within the biosphere.
AIR POLLUTION
Air pollution refers to the contamination of the air and includes acoustic contamination. It involves the presence of materials or forms of energy in the air that pose risks, harm, or serious discomfort to people, goods, and the environment.
SOURCES OF POLLUTION
There are two main types of pollution sources:
- Natural: These sources include
A Comprehensive Guide to Paint Types and Applications
Introduction
Paint, a viscous liquid or mixture, finds widespread use in various applications, including roller painting, dipping, and projection (gun spraying). This guide delves into the world of paints, exploring their history, properties, components, and diverse types.
History of Paint
The use of paint dates back to ancient civilizations like Egypt and Rome, where rubber-based paints and waxes were prevalent. The 18th century witnessed the emergence of a home painting chemical industry. A significant
Read MoreChemical Reactions and Environmental Impact
What is the Difference Between a Chemical and a Physical Transformation?
In a chemical transformation, substances disappear, and new ones appear. These are called chemical reactions.
In a physical transformation, we have the same substances at the beginning and the end of the process.
What is a Chemical Reaction?
A chemical reaction is a process by which some substances, called reactants, become new substances, called products.
How are Chemical Reactions Represented?
Chemical reactions are represented
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