We rely on Earth’s surface (and a little bit above and below) to supply most of what we need to live. Biosphere Introduction The Big Picture Earth’s surface is two-thirds water. The hydrosphere extends from Earth's surface downward several kilometers into the lithosphere and upward about 12 kilometers into the atmosphere. It ranges from 10 to 20 kilometers in thickness. Overview: The Scope of Ecology. Concept 50.1 Ecology is the study of interactions between organisms and the environment. of Earth is a solid inner core of nickel and iron. Images can be handed out or projected for the class. But if it did you might have thought of it because, like all matter on Earth, the supply of nitrogen is finite. Until the launch of the first humans into space, we did not fully appreciate the beauty and diversity of our planet. Overview: Introduction to the Introduction of Geology: Lecture 1 Notes (PDF) Lecture 1 Slides (PDF - 1.6MB) 2: TP: Origin and Age of the Earth: Lecture 2 Notes (PDF) Lecture 2 Slides (PDF - 2.6MB) 3: OJ: Introduction to Minerals : Lecture 3 Notes (PDF) Lecture 3 Slides (PDF - 2.3MB) 4: OJ: Igneous Rocks: Lecture 4 Notes (PDF) Slides are not available for this lecture. After discussing the information in the introduction section, give students an opportunity to put the process to work by analyzing a sample event. Introduction Imagine you are outside and this thought suddenly occurs to you: “What if all the nitrogen in the biosphere were used up?” Actually, that thought probably wouldn’t suddenly jump into your head on the average day. This causes uneven heating of the Earth’s surface by the Sun every day, with some regions warmer than others. Not so very long ago, the earth numbered two thousand million inhabitants: five hundred million men, and one thousand five hundred million natives. The continents on which we live make up the remainder. Each pair/small group will select/be assigned/select an EVENT to evaluate from the list provided. Chapter 50 An Introduction to Ecology and the Biosphere Lecture Outline . Ecologists ask questions about factors affecting the distribution and abundance of organisms. Intro to Earth’s Ionosphere - Bodo Reinisch 2 IRI 2019 Workshop, Nicosia Cyprus Ionosphere: Support & Obstacle. An introduction to EARTH’S IONOSPHERE Bodo Reinisch Lowell Digisonde International & University of Massachusetts Lowell Email : Bodo.Reinisch@digisonde.com. The Hydrosphere-- contains all the solid, liquid, and gaseous water of the planet. 2. Between the two there were hired kinglets, overlords, and a bourgeoisie, sham from beginning to end, which served as go-betweens. At any time, only half of the Earth is warmed by the Sun, while the Earth’s other side is shadowed. The fundamental cause of weather is the effect of the Sun on the Earth. The former had the Word; the others had the use of it. Ecology is the scientific study of the interactions between organisms and their environment.