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The atmosphere is a vital component of our planet, encompassing a complex arrangement of different layers. These layers of the atmosphere play a crucial role in the Earth’s climate, weather patterns, and the overall sustenance of life. Imagine if the Earth had no atmosphere – no protective shield to keep us safe. We’d be exposed to harmful radiation from the Sun, and there would be no air to breathe.

Structure of Atmosphere
Before we dive into the layers, let’s first understand the general structure of the atmosphere. The Earth’s atmosphere consists of a mixture of gases, with the two most abundant ones being nitrogen (about 78%) and oxygen (around 21%). The remaining 1% includes gases like argon, carbon dioxide, and trace amounts of other elements.

The atmosphere is divided into different layers, each with specific properties. These layers vary in terms of temperature, composition, and other characteristics. Think of the atmosphere as a multi-layered cake, with each layer serving its unique purpose.

Layers of Atmosphere
The layers of the atmosphere are given below,
Troposphere
The troposphere is the layer closest to the Earth’s surface, extending approximately 8 to 15 kilometers above the planet’s surface. In the troposphere, the temperature decreases with altitude as well weather phenomena such as clouds, storms, and rains occur here in this layer.It is colder at higher altitudes due to decreasing air pressure, averaging a decrease of 6.5 degrees Celsius per kilometer. The troposphere is of utmost importance as it is the layer we inhabit and where all life on Earth exists. It provides us with the air we breathe and shields us from harmful radiation.

Stratosphere
The stratosphere is located just above the troposphere and reaches up to approximately 50 kilometers (about 31.07 mi) above the Earth’s surface. Similar to the troposphere, the temperature in the stratosphere also increases with altitude. This phenomenon is attributed to the presence of the ozone layer, which absorbs most of the incoming ultraviolet (UV) radiation from the Sun. The ozone layer acts as a protective shield, safeguarding life on Earth from the harmful effects of excessive UV radiation. Additionally, the stratosphere is a critical layer for air travel, as commercial airplanes fly within this region.

Mesosphere
Above the stratosphere lies the mesosphere, extending up to about 85 kilometers above the Earth’s surface. The mesosphere is characterized by extremely low temperatures, dropping to as low as -90 degrees Celsius. It is in this layer that meteors burn up upon entry, creating mesmerizing shooting stars. Furthermore, the mesosphere plays a crucial role in protecting the Earth from the impact of space debris. It also aids in transmitting radio waves for long-distance communication.

Thermosphere
The thermosphere is situated beyond the mesosphere and reaches an altitude of about 600 kilometers. In this layer, the temperature rises significantly due to the absorption of high-energy solar radiation. Although the thermosphere has extremely high temperatures, it is not noticeably hot due to the low density of molecules. This layer is essential for the operation of satellites and spacecraft, as it facilitates the transmission of radio signals and houses the International Space Station.

Exosphere
The exosphere is the outermost layer of the Earth’s atmosphere. It extends from the top of the thermosphere to the edge of space. The exosphere is characterized by extremely low atmospheric pressure and a gradual transition into the vacuum of space. This layer contains a sparse distribution of gas molecules, primarily hydrogen and helium. It is here that gases escape into space, which has significant implications for studying the Earth’s long-term climate change.

Importance of Earth’s Atmosphere Layers

The following are the importance of atmosphere layer,
Troposphere: The troposphere is crucial for life on Earth because it contains the air we breathe. It also acts as a buffer, absorbing harmful ultraviolet (UV) radiation from the Sun.
Stratosphere: The stratosphere is vital because it contains the ozone layer, which shields us from harmful ultraviolet (UV) radiation. Without the ozone layer, life on Earth would be at risk from excessive UV exposure.
Mesosphere: The mesosphere plays a role in protecting us from incoming space debris by causing most meteors to disintegrate upon entry.
Thermosphere: The thermosphere is important for various reasons, including its role in helping satellites stay in orbit, as it’s where the International Space Station (ISS) orbits. It also enables the transmission of radio signals over long distances.
Exosphere: The exosphere marks the boundary between our planet and the vastness of space. It’s the layer that spacecraft must pass through to leave Earth’s atmosphere.
The layers of the atmosphere work together to regulate the Earth’s climate and provide a suitable environment for life to thrive. Each layer has its unique characteristics and importance, contributing to the delicate balance that sustains our planet. Understanding the structure and significance of these layers enables us to appreciate the intricacies of our atmosphere and the fascinating interplay between its different components.

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Getting an online education college degree is the wave of the future! The increase in adults going back to school has jumped from 28% in 1970 to 39% in 2006. In 2001, 92 million (46%) adults participated in educational ventures. (Statistics may be found at eLearners.com) But, the largest group of online education participants is the

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The wave of the future is an online college education! There has been a steady increase in adults returning to school – from 28% in 1970 to 39% in 2006

(Statistics may be found at eLearners.com). Online education participants are the largest group earning online degrees. Below is a summary of degree types, degree levels, and majors, along with “10 Predictions for Online Education in 2007.”

Four Levels of Online Education College Degrees:

Associate Degrees.

Bachelor’s Degrees.

Master’s Degrees.

Doctoral Degrees.

Types of Online Education College Degrees & Majors:

Arts & Humanities Degrees: Liberal Arts, Humanities, Design, Writing, Communications, English

Business & MBA Degrees: MBA, Management, Human Resources, Marketing, Finance, Accounting

Computers & I.T. Degrees: Information Technology, Web Design, Networks, Technology Management

Education & Teaching Degrees: K-12, Early Childhood, Administration, Special Education, Curriculum/Instruction

Health & Nursing Degrees: Nursing, Psychology, Counseling, Health Administration, Human Services

Science & Engineering Degrees: Engineering, Technology, Mathematics, Aviation

Social Science Degrees: Criminal Justice, Paralegal, Law, Psychology, Public Administration, Political Science

Some careers require only associate degrees (equivalent to the first two years of a college education). These include: physical therapist assistants, dental hygienists, forensic technicians, veterinary technologists and technicians, diagnostic medical sonographers, occupational therapist assistants, cardiovascular technologists and technicians, paralegals and legal assistants. Considering that only a two year degree is required for these jobs, they are well-paid and respected.

10 Predictions About Online Education in 2007

1. Online education programs will continue to grow and expand. More programs will be offered online to earn online degrees and those programs currently offered will grow to include additional areas of study.

2. Technology will advance. Technology is continually improving and replacing older technologies. More options will gradually become available to students as online education access speeds up – such as online access to evaluations of their homework, etc.

3. Costs will decrease. As more online education programs evolve, competition will increase, and costs to students will decrease.

4. New degree programs will develop. New degree programs, related to online education will develop. Such programs might include: online student counseling, online education site debate/discussion host, etc.

5. More students will enroll in online education programs. Each year the enrollment in programs continues to increase and will continue to do so. More than 1.6 million students took at least one online course in 2002. In 2003, 1.9 million students took online courses. In 2004, more than 2.3 million students enrolled. In 2005, the number of online learners increased to almost 3.2 million students. (Source: Making the Grade: Online Education in the United States, 2006, Sloan Consortium)

6. Specialized programs will begin to emerge. Special online programs for students with learning disabilities will begin to emerge to encourage these students to attend online education programs.

7. Attitudes toward higher education will begin to change. The general public will soon see degree programs as accessible to the average person, rather than just the highly intelligent.

8. The time to obtain a degree will shorten. It will take less time to obtain a degree as students will be able to work year-round, at any time of the day or night, transfer courses from other programs, and earn course credit by challenge exams. Two years is generally the minimum amount of time in which degree programs can be completed, although this varies, based on any time off between courses and previous classroom work. Many students complete a degree in two to three years, but it can take four or five years or more, depending on the pace. The more credits transferred, the faster the degree will be completed. You can earn credits from professional training, the College Level Examination Program (CLEP), or previous college courses. (Source: www.uopxworld.edu., “Frequently Asked Questions”)

9. Most online colleges will begin to offer course credit for life experience. More credit will be given for life experiences, especially to older students.

10. New programs will begin that are hybrids. New programs will be developed that combine traditional on-campus education with online education or work/online study programs.

Getting an online education college degree is the wave of the future! Use the 10 predictions about online education in this article to begin your search for the online education college degree that is best for you.