Environmental Threats: Toxic Substances, Radiation, Habitat Loss
Other Toxic Substances
Toxic substances are chemicals whose manufacture, processing, distribution, use, and disposal pose a risk to human health and the environment. Most of these toxic substances are synthetic chemicals that enter the environment and persist there for long periods. In areas where chemicals are produced, significant concentrations of toxic substances can accumulate. If these substances seep into the soil or water, they may contaminate the water supply, air, crops, and domestic animals.
Read MoreFundamentals of Science: Rocks, Minerals, Plate Tectonics & Evolution
Science Overview
What is Science?
- Derived from Latin scientia, meaning knowledge.
- Discovery through observation; not static, continuously evolving.
- Creation of new knowledge through research.
Types of Knowledge
- Belief Knowledge: Inherent, personal, and often supernatural.
- Research Knowledge: Universal, based on observable and measurable phenomena.
Facts
- Derived from both belief and research knowledge.
- Science is based on facts that can be tested and repeated.
How Science Works
- A process of observations (data)
Postmortem Abiotic Phenomena: A Comprehensive Analysis
Abiotic Postmortem Phenomena
Abiotic postmortem phenomena exhibit generalized or localized expressions, providing crucial insights into the timing of death. These phenomena behave as inert entities, dependent on environmental conditions. Key characteristics include:
- Strong individual character
- Standardized data, applicable universally
- Unaffected by biochemical or enzymatic processes
- Slow and consistent progression
1. Cadaveric Dehydration
Dehydration has limited practical application in determining the
Read MoreCrystalline Forms and Volcanic Mass: A Geomorphological Analysis
Crystalline Forms and Volcanic Mass
Crystalline Masses
The term “rock crystal” is useful for referring collectively to intrusive igneous and metamorphic rocks, such as anorthosites and gneiss. They are divided into groups:
Homogeneous Crystalline Masses
These are huge intrusive granite bodies, sometimes kilometers deep, that reach the surface through erosion. Their topographical development varies; the texture and composition of the rock mass depend on whether or not it has been faulted. Once a batholith
Read MoreScience Fundamentals: Rocks, Minerals, Plate Tectonics & More
Science Overview
What is Science?
- Derived from Latin scientia, meaning knowledge.
- Discovery through observation; not static, continuously evolving.
- Creation of new knowledge through research.
Types of Knowledge:
- Belief Knowledge: Inherent, personal, and often supernatural.
- Research Knowledge: Universal, based on observable and measurable phenomena.
Facts:
- Derived from both belief and research knowledge.
- Science is based on facts that can be tested and repeated.
How Science Works:
- A process of observations (
Ferrous Metals: Properties, Production, and Environmental Impact
Ferrous metals are those containing iron as a base. Types of iron minerals include magnetite, hematite, limonite, and siderite. These minerals have the advantage of being abundant and contain a high proportion of pure iron.
Steel Production
The steel gathering process occurs through blast furnaces (using iron ore) and electric ovens (using scrap metal).
Raw Materials
Iron ore: Before being introduced into the furnace, iron ore should be subject to a series of treatments. These treatments consist of
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