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Our Solar System

Our Solar System. Lesson 1 Earth and Neighbors (Unit C pg. C6-7). Solar system - (FC) the sun and object traveling around it. Major objects in the solar system include: - 8 planets (know in order from sun) - dwarf planets (know Pluto and others have been found)

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Our Solar System

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  1. Our Solar System

  2. Lesson 1 Earth and Neighbors (Unit C pg. C6-7) Solar system - (FC) the sun and object traveling around it. Major objects in the solar system include: - 8 planets (know in order from sun) - dwarf planets (know Pluto and others have been found) asteroids, comets, and the Sun What is the difference between a revolution and rotation of a planet? revolution - one complete orbit around the sun one year rotation- one complete turn on an axis(spin) one day

  3. a mass d distance b density c pounds e momentum f inertia g gravity

  4. revolution rotation Describe draw.

  5. The Search for Another Earth What Is a Planet- Earth as a System Total Solar Eclipse Animation Galileo- Sun-Centered System

  6. Characteristics of Dwarf Planets A dwarf planet is a celestial body that: (a) In orbit around the Sun (b) has sufficient mass for its self-gravity to create a nearly round shape (c) has NOT cleared the neighborhood around its orbit, (d) is not a satellite

  7. 1. Planets (a) is in orbit around the Sun, (b) has a nearly round shape (c) has cleared the neighborhood around its orbit. What is the difference between a dwarf planet and a planet? planets clear their neighborhood

  8. One year on earth = 365.25 days leap year adjusts our .25 extra days per year. What keeps the planets in orbit? (C8-9) gravity and inertia move box for answer

  9. 2 things that keep planets in orbit. 1. Inertia - (FC) the tendency of a moving object to keep moving in a straight line or of any object to resist a change in motion. 2. Gravity - (FC) The push or pull between objects Gravitational force depends on two measurements (see next page)

  10. Gravity depends on 2 measurements 1. mass The greater the mass of an object the greater its gravitational pull 2. distance between objects the farther objects are apart the less pull between them

  11. Seasons Cause of Season Change C11 1) Tilt of the Earth on its axis Sunlight will be more direct at different times of the year. 2) revolution of Earth around the Sun

  12. Why can Earth support life? - perfect distance from the sun - available water in 3 states - ideal atmosphere

  13. pg. c12-c15 Know terms and define -(FC) crust, lithosphere, hydrosphere and atmosphere Moon - orbits earth and is a natural satellite has no hydrosphere, or atmosphere very cold at night and hot during the day we see only one side constellations (FC) - a pattern of stars in the sky

  14. make a drawing labeling the following features Crust Hydrosphere lithosphere Atmosphere

  15. Review for lesson 1 Quiz - Study vocab. what is in solar system? 8planets, asteroids, comets, sun, dwarf planets revolution / rotation in respect to day and year What keeps planets in orbit. gravity and inertia - define inertia gravity depends on 2 measurements 1. _mass __ 2. distance between objects What causes seasons? amount of direct sunlight due to tilt of earth on axis while it revolves sun. Define and locate parts of Earth's surface. Describe the moon - we see one side, dry, no life, very cold and hot, no atmosphere, dust surface, satellite of earth Define constellation

  16. What causes Seasons? 1. Tilt of the earth on its axis. summer in USA - northern hemisphere tilts toward the sun Winter in USA - N. Hemisphere tilts away from the sun The tilt of the Earth on its axis allows more direct sunlight at certain times of year. 2.

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