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Teaching Point: “To describe and measure the shape of an object in orbit.”

Do Now: What do we mean when we say something is in ‘orbit’?. Teaching Point: “To describe and measure the shape of an object in orbit.” . TP: “To understand the shape and measurements of an orbit.” Eccentricity. Eccentricity- the degree of elongation of an elliptical orbit

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Teaching Point: “To describe and measure the shape of an object in orbit.”

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  1. Do Now: What do we mean when we say something is in ‘orbit’? Teaching Point: “To describe and measure the shape of an object in orbit.”

  2. TP: “To understand the shape and measurements of an orbit.”Eccentricity Eccentricity-the degree of elongation of an elliptical orbit Foci-two imaginary points in the center of an ellipse which determines the shape of an ellipse Major axis- a straight line drawn across the ellipse passing over the foci

  3. TP: “To understand the shape and measurements of an orbit.”Eccentricity

  4. TP: “To understand the shape and measurements of an orbit.”Eccentricity Formula • Eccentricity = _____ Distance between the foci______ Length of the major axis • The quotient will be a number between 0 and 1 • The closer to 0 = more circular the orbit • The closer to 1 = more ellipticalthe orbit

  5. TP: “To understand the shape and measurements of an orbit.”Earth’s Eccentricity Changes

  6. TP: “To understand the shape and measurements of an orbit.” Solar System Eccentricities

  7. TP: “To understand the shape and measurements of an orbit.” Class Activity Student 1-Pick 5 planets from page 15 in your ESRT that have very different eccentricities from one another. Create 5 ellipses based on that information. Label the parts of an ellipse for one (1) of them. Student 2-Using page 15 of your ESRT, make a bar graph of the decreasing eccentricityof the planets in our solar system. Student 3-Using page 15 of your ESRT, make a line graph of increasing eccentricity of the planets in our. solar system.

  8. TP: “To understand the shape and measurements of an orbit.” Depth of Knowledge How might changing the eccentricity of a planet’s orbit impact that planet? or Explain why a planet cannot have an eccentricity equal to 1, and why does the sun not have an eccentricity value in the ESRT?

  9. TP: “To understand the shape and measurements of an orbit.” Lesson Summary • What is the most important thing you learned in today’s lesson? • Why was that the most important thing that you learned?

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