Earth and Life Science Lesson 2 PDF

Earth and Life Science Origin and Structure of the Earth (Subsystem) IDENTIFY AND EXPLAIN THE GIVEN PICTURE  Objectives After going through this lesson, you are expected to: 1. determine the four subsystems of the Earth; 2. describe the characteristics of each subsystem; 3. trace t...

Earth and Life Science Origin and Structure of the Earth (Subsystem) IDENTIFY AND EXPLAIN THE GIVEN PICTURE  Objectives After going through this lesson, you are expected to: 1. determine the four subsystems of the Earth; 2. describe the characteristics of each subsystem; 3. trace the flow of matter and energy in the Earth’s subsystems; and 4. express one’s internalized role as steward of the four subsystems concerning the flow of matter and energy. Earth is the only planet in the solar system with rain that falls from clouds, runs over the land, and collects in extensive oceans. It is also the only planet that supports life.  SYSTEM- is a set of interconnected components that are interacting to form a unified whole. For example: ECOSYSTEM The organism are interconnected and interacting  Earth system is the study of the interconnected components of our environment the atmosphere, hydrosphere, geosphere, and biosphere—and how they interact to produce an integrated whole. Closed System-only an exchange of heat or energy and no exchange of matter. Open system-can exchange both energy and matter with its surroundings.  Subsystems of the Earth 1. Atmosphere – the gaseous layer above the Earth’s surface primarily composed of different gases such as nitrogen and oxygen. 2. Biosphere – the zone of the Earth where all forms of life exist. This serves as the ecosystem of all living and non- living organisms. 3. Geosphere – the solid part of the Earth that consists the entire planet from the centre of the core to the outer crust. It includes core, mantle, and crust of the Earth. 4. Hydrosphere – the water part of the Earth that includes oceans and glaciers. 20XX presentation title 11  ATMOSPHERE it is the gaseous layer above the Earth’s surface, primarily composed of 78% nitrogen and 21% oxygen. Other gases like argon, carbon dioxide, carbon monoxide, ozone, and other inert gases made the remaining 1%. In addition, the atmosphere supports life indirectly by regulating climate. Air acts as both a blanket and a filter, retaining heat at night and shielding from direct solar radiation during the day. 20XX presentation title 12 2.Biosphere – the zone of Earth where all forms of life exist: in the sea, on land, and in water. It is sometimes called as the large ecosystem. This is the zone that life inhabits. Biosphere is a very thin layer of the earth’s surface. 20XX presentation title 14 20XX presentation title 15  3. Geosphere – the solid Earth, consisting of the entire planet from the centre of the core to the outer crust. It includes the core, mantle, and crust of the Earth. 20XX presentation title 16 20XX presentation title 17 4. Hydrosphere – the water part of the Earth which circulates among oceans, continents, glaciers, and atmosphere. Oceans cover 71% of the Earth and contain 97.5% of its water. 20XX presentation title 18 20XX presentation title 19  Earth is a complex system made up of many smaller systems through which matter and energy are continuously cycled. Energy and matter flow through Earth’s spheres: geosphere, hydrosphere, atmosphere, and biosphere. Energy flows through the atmosphere mostly by convection. 20XX presentation title 20 How does matter and energy flow across the four subsystems of the Earth? The Earth consists of four subsystems, across whose boundaries matter and energy flows, the atmosphere (air), biosphere (living things), hydrosphere (water), and geosphere (land). 20XX presentation title 21  The atmosphere provides the geosphere with heat and energy needed for rock breakdown and erosion. The biosphere receives gases, heat, and sunlight (energy) from the atmosphere. It receives water from the hydrosphere and a living medium from the geosphere. 20XX presentation title 22 20XX presentation title 23  ACTIVITY 1.2 20XX presentation title 24 20XX presentation title 25 What role does education and public awareness play in addressing and managing the alterations of Earth's subsystems, and how can individuals contribute to thank you