8th Grade Chapter 2 Lesson 5


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8th Grade Chapter 2 Lesson 5

  1. 1. 8 th Grade Chapter 2 Lesson Pgs. 85-90 (Stop at Unmanned Space Probes) For Student Use Only
  2. 2. Exploring Space <ul><li>The Space Age: </li></ul><ul><ul><li>We have been given a wonderful gift of technology and material to help explore all of creation. </li></ul></ul><ul><ul><li>Satellites and other spacecraft escape Earth’s atmosphere </li></ul></ul>
  3. 3. Exploring Space <ul><li>The Space Age </li></ul><ul><ul><li>Achieving and Maintaining Orbit- </li></ul></ul><ul><ul><ul><li>In order for an object to orbit it must maintain a speed of about 17,200. </li></ul></ul></ul><ul><ul><ul><li>When the object slows down it sinks towards the earth and speeds up. Then it goes higher and slows down. This causes an elliptical orbits. </li></ul></ul></ul>
  4. 4. Exploring Space <ul><li>The Space Age: </li></ul><ul><ul><ul><li>Apogee: high point in elliptical orbit from Earth </li></ul></ul></ul><ul><ul><ul><li>Perigee: low point in elliptical orbit from Earth </li></ul></ul></ul><ul><ul><li>As speed increases the apogee and perigee grows. </li></ul></ul><ul><ul><li>Orbits can be adjusted by adjusting speed at a certain time. </li></ul></ul>
  5. 5. Exploring Space <ul><li>Escape Velocity </li></ul><ul><ul><li>Escape Velocity: The speed it takes to escape Earth’s gravitational pull. </li></ul></ul><ul><li>Inter-Planetary: </li></ul><ul><ul><li>To travel from one planet to another we can use orbits (we have no way to go directly there), however it takes a long time. </li></ul></ul>
  6. 6. Exploring Space <ul><li>Unmanned Satellites: </li></ul><ul><ul><li>Earth-orbiting satellites do just about everything. </li></ul></ul><ul><ul><ul><li>Astronomical Satellites: Used for research </li></ul></ul></ul><ul><ul><ul><li>Communication Satellites: Used for TV, phone calls, etc. </li></ul></ul></ul><ul><ul><ul><ul><li>Communication Satellites are geostationary orbits </li></ul></ul></ul></ul><ul><ul><ul><ul><ul><li>Geostationary orbits: orbits that are directly above the equator. </li></ul></ul></ul></ul></ul>
  7. 7. Exploring Space <ul><li>Unmanned Satellites: </li></ul><ul><ul><li>Weather Satellites: Help show storms at sea </li></ul></ul><ul><ul><ul><li>Polar Orbit: satellites that orbit perpendicular to the equator. </li></ul></ul></ul><ul><ul><li>Rescue Satellites: receive rescue signals </li></ul></ul><ul><ul><li>Navigational Satellites: tell information of lattitude, longitude, altitude and velocity from these satellites. </li></ul></ul><ul><ul><li>Earth Resources Satellites: make maps, detect resources </li></ul></ul>