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Chapter 23.1
Chapter 23.1
Chapter 23.1
Chapter 23.1
Chapter 23.1
Chapter 23.1
Chapter 23.1
Chapter 23.1
Chapter 23.1
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Chapter 23.1

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  • 1. Chapter 23.1 The Solar System
  • 2. <ul><li>Our solar system consists of 8 planets </li></ul><ul><li>All planets travel in a elliptical orbit </li></ul>
  • 3. Terrestrial planets <ul><li>Earth like, small and rocky </li></ul><ul><ul><li>Mercury </li></ul></ul><ul><ul><li>Venus </li></ul></ul><ul><ul><li>Earth </li></ul></ul><ul><ul><li>Mars </li></ul></ul>
  • 4. Jovian planets <ul><li>Jupiter like, huge gas giants </li></ul><ul><ul><li>Jupiter </li></ul></ul><ul><ul><li>Saturn </li></ul></ul><ul><ul><li>Uranus </li></ul></ul><ul><ul><li>Neptune </li></ul></ul><ul><li>Pluto fits into neither </li></ul><ul><li>category </li></ul>
  • 5. <ul><li>Size is the main difference between terrestrial and Jovian planets </li></ul><ul><ul><li>Earth’s mass is only 1/17 as great as Neptune’s </li></ul></ul><ul><li>Density, chemical makeup, and rate of rotation are different </li></ul><ul><ul><li>Density of terrestrial planets average about 5 times the density of water </li></ul></ul>Planet Sizes
  • 6. The Interiors of the Planets <ul><li>Substances that make up the planet are divided into 3 groups </li></ul><ul><ul><li>Gases </li></ul></ul><ul><ul><li>Rock </li></ul></ul><ul><ul><li>Ice: Ex. ammonia, methane, carbon dioxide, and water </li></ul></ul><ul><ul><ul><li>Terrestrial planets are mostly rocky and have metallic substances </li></ul></ul></ul><ul><ul><ul><li>Jovian planets have large amounts of gases and ices </li></ul></ul></ul>
  • 7. The Atmosphere of the Planets <ul><li>Jovian planets have thick atmospheres of helium, methane, and ammonia </li></ul><ul><li>A planet’s ability to retain an atmosphere depends on its mass and temperature </li></ul><ul><ul><li>Jovian planets have greater surface gravities </li></ul></ul>
  • 8. Formation of the Solar System <ul><li>Nebular Theory – the sun and the planets formed from a rotating disk of dust and gases </li></ul><ul><ul><li>As the speed of rotation increased, the center began to flatten out causing matter to become more concentrated in the center, which is the sun </li></ul></ul>
  • 9. <ul><li>Bits of matter began to clump together, called accretion. </li></ul><ul><li>Colliding matter formed small, irregularly shaped bodies called planetesimals. </li></ul><ul><ul><li>In the inner solar system, close to the sun, temperatures were high </li></ul></ul><ul><ul><ul><li>Only metal and silicate minerals could form. </li></ul></ul></ul><ul><ul><li>In the outer solar system, it was cold enough for ices to form. </li></ul></ul>

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