ISDN essays

ISDN essays Gas bubbles form in magma. As magma rises higher and higher, the bubbles get bigger and bigger. When the magma reaches the surface and erupts, the bubbles expand very rapidly, and an explosive eruption happens. The easiest answer is that it erupts when the pressure of the magma inside becomes so great that the volcano splits and the magma gets out. The magma pressure can get high if the supply to the volcano from the Earth's mantle is high. The magma pressure can also get high if magma is just sitting around in the magma chamber within the volcano. This is because as the magma in the chamber starts to cool off, it releases gases. These gases can increase the pressure until the volcano fractures and you have an eruption. Mount St. Helens National Volcanic Monument At 8:32 Sunday morning, May 18, 1980, Mount St. Helens erupted. Shaken by an earthquake measuring 5.1 on the Richter scale, the north face of this tall symmetrical mountain collapsed in a massive rock debris avalanche. In a few moments this slab of rock and ice slammed into Spirit Lake, crossed a ridge 1,300 feet high, and roared 14 miles down the Toutle River. The avalanche rapidly released pressurized gases within the volcano. A tremendous lateral explosion ripped through the avalanche and developed into a turbulent, stone-filled wind that swept over ridges and toppled trees. Nearly 150 square miles of forest was blown over or left dead and standing. At the same time a mushroom-shaped column of ash rose thousands of feet skyward and drifted downwind, turning day into night as dark, gray ash fell over eastern Washington and beyond. Wet, cement-like slurries of rock and mud scoured all sides of the volcano. The eruption lasted 9 hours, but Mount St. Helens and the surrounding landscape were dramatically changed within moments. ...

Free Online Religion Courses

Free Online Religion Courses Whether youre looking for a deeper understanding of world religions or simply want to understand your own faith on a deeper level, these free online religion courses can help. With video lessons, podcasts, and exercises, youll be instructed by religious leaders from around the globe. Buddhism Buddhist Studies - If you want details quickly, youll get them with this Buddhist study guide. Choose your topic and your skill level for explanations of Buddhist spirituality, culture, belief, and practice. Buddhism and Modern Psychology - It turns out that many Buddhist practices (such as meditation) have a proven use in modern psychology. Through this 6-unit course from Princeton University, youll explore how Buddhists view the human mind and human problems. An Introductory Course on Early Buddhism - If youre looking for an in-depth discussion of Buddhist philosophy, this course is for you. The PDF lessons walk students through Buddahs life, the four noble truths, the eight-fold path, meditation, and many other essential beliefs. The Central Philosophy of Tibet - For the academically-inclined, this podcast offers a professorial look at Buddhist principles and practices throughout Tibetan history. Christianity Hebrew for Christians - These text and audio lessons are designed to help Christians study Hebrew to gain a deeper understanding of their early scriptures. Truth for the World - These brief lessons include beginning, intermediate, and advanced topics in Bible studies. Students can browse through written lectures and also view short video segments. Both the Old and New Testaments are discussed. Bible Study Lessons - Take a look at these step-by-step Bible study guides to learn more about the scriptures from a Christian perspective. You can download guides as PDF documents or read them online. Once youre done with each section, take a quiz to see how much youve learned. World Bible School - Through this easy-to-understand course, students can learn the essentials of the Bible from a Christian faith-promoting world view. Email and mail correspondence options are also available. Hinduism American/International Gita Society - Through four levels, this course helps English speakers understand the Bhagavad Gita. The course includes an English language version of the scripture and dozens of PDF lessons guiding seekers through the book. Kauais Hindi Monastery - Take a look at this well-organized site to take online classes on the basics of Hinduism, sign up for a daily lesson, or listen to audio discussions. Interesting audio options include: How to Realize God: Like a Childs Self-Discovery, The Gurus Job: Love, and All Knowing Within You: No Good, No Bad. Islam Studying Islam  - Through this site, students can access a variety of course materials including YouTube videos, text-based lessons, and discussions related to essential topics in Islam. Introduction to the Koran: The Scripture of Islam  - From the University of Notre Dame, this course offers an academic look at the Koran, its text, its cultural meanings, and its place in history. Understanding Islam  - This free online course is designed for students relatively new to Islamic beliefs. With quotes from essential texts, graphics, and easy-to-understand explanations, students work their way through three units. Islamic Online University  - For practicing Muslims, this site offers a variety of course options including The Moral Foundations of Islamic Culture, No Doubt: Conveying Islam with Compassion and Reason, and Arabic Speech Simplified. Judaism Jewish Interactive Studies  - These introductory text-based courses help students understand the fundamentals of Jewish belief and practice. Both the Foundations and the Ethics courses are free in PDF format. Hebrew Learning  - If youre looking to learn Hebrew, this is a smart place to start. Explore dozens of brief lessons with audio and interactive graphics. Reform Judaism Webinars  - These webinars focus on topics of interest in Reform Judaism and are available on topics such as Torah Alive: Every Person Has a Name, Sharing Your Harvest with Others: Sukkot and Social Justice, and Jews and the Civil Rights Movement. Judaism 101  - If youre a young Jew between the ages of 18 and 26, consider taking this foundational online course. Youll learn through expert videos, quizzes, and events. Sign up and complete the requirements, and you may even qualify for a $100 stipend.