Presentation on theme: "Chapter 2 The Solar System"— Presentation transcript:
1 Chapter 2 The Solar System Section 1 Observing the Solar System
2 Ch. 2, section 1 Observing the Solar System Objectives Explain how the heliocentric and geocentric models of the solar system differDescribe Kepler’s discovery about the planet’s orbitIdentify two factors that keep the planets in their orbits.
3 Geocentric A description of the solar system in which all of the planets revolve around Earth.
4 2. Heliocentric A description of the solar system in which all of the planets revolve around the sun.
6 4. Inertia The tendency of a moving object to continue in a straight line or a stationary object to remain in place.
7 1. In a _________________, Earth is at the center of the revolving planets. geocentric system
8 2. In a _________________, Earth and the other planets revolve around the sun. heliocentric system
9 3. Galileo’s two discoveries to support the heliocentric system were: - he saw __________ ___________ revolving around Jupiter. - he also saw that ____________ goes through phases similar to those of Earth’s moonfourmoonsVenus
10 4. Kepler discovered that the orbit of each planet is an __________. ellipse
11 5. Newton concluded that two factors: _________ and __________ combine to keep the planets in orbit. inertiagravity