PPT-Formation of Earth, Moon, and planets (cont’d)

Part 1 Origin of the elements Part 2 Geochronometry Age of Earth Formation of Earth and Moon Differentiation of core and mantle Isotope tracing sequence of events What have we learned so far. Formation of the Solar System. Formation of the Solar System. Scientists claim that 4.5 billion years ago there was just a featureless cloud of . gas..mostly. hydrogen and some helium with a little carbon and iron. ASTR 101. Prof. Dave Hanes. The . Moon. ’. s . Baleful Influence . (?. ). Crime . rates, . homicides, . birth rates, acts of. ‘. lunacy,. ’. t. raffic a. ccidents. , etc…. http. ://skepdic.com/fullmoon.html. Geochronometry. Isotope tracing. History . of “primordial” . Pb. Meteorite samples . Chondrite. – a primitive, undifferentiated meteorite. CI refers to a particular class of carbonaceous . chondrite. Sky Part II. Depending on the relative sizes and distances of the Sun and a moon, you might see an eclipse like this: . Sun. planet. moon. Solar Eclipses. Or you might see an eclipse like this:. Sun. WHAT IS ASTRONOMY?. Astronomy – the study of the universe. Astronomy? Impossible to understand and madness to investigate.. — Sophocles, c. 420 BCE. Rotation: The turning of the Earth on its own axis. ASTR 101. Prof. Dave Hanes. The . Moon. ’. s . Baleful Influence . (?. ). Crime . rates, . homicides, . birth rates, acts of. ‘. lunacy,. ’. t. raffic a. ccidents. , etc…. http. ://skepdic.com/fullmoon.html. The Solar System. Sun, planets, moons, comets, asteroids, meteoroids.. Sun at the center.. Eight planets, thousands of asteroids, and millions of comets and meteoroids orbit the sun.. Dozens of moons orbit the planets.. Earth and Sun Relationship. Earth completes one revolution around the sun every 365 ¼ days. . Revolution – the time it takes for the Earth to complete 1 orbit around the sun.. What is Rotation?. Rotation – the Earth rotates around its axis once every 24 hours.. SC.5.E.5.1, SC.5.E.5.2, SC.5.E.5.3, SC.4.E.5.4 . Department of Science. Big Idea 5: Earth in Space and Time Benchmarks. SC.5.E.5.1. Recognize that a galaxy consists of gas, dust, and many stars, including any objects orbiting the stars. Identify our home galaxy as the Milky Way. AA . Susana Angulo, Christy Brown, . Teresa Morales, Robin Reichenbach. Physical Science 2004. Spring 2009. Dianne Phillips. Introduction. :. For our project we . designed a . 3. rd. grade . lesson to teach students about the position of the Earth in space. . 14 billion years ago. Creation of all matter. Hydrogen and Helium the first. More complex elements evolved through time. The Expanding . Universe. The Doppler effect is used to document the expanding universe. 2015-2016. Earth’s movement is constant!. Earth’s orbit. Sun is at the center. Orbit: movement of an object around another. ex: Earth orbits the Sun.. Elliptical: oval shaped. Revolution: 1 full orbit of Earth around Sun. . SOLAR SYSTEM: all of the planets, 
moons, comets, and rocks that travel 
around the Sun. GALAXY: giant collection of gas, dust, 
and trillions of stars. Milky Way: our galaxy. Planet Sizes. PLANETS. Mars. Venus. Earth. Jupiter. Mercury. Saturn. Uranus. Neptune. Our Home Planet. Earth, our home planet, is the third planet from the Sun and the fifth largest planet in the Solar System. Earth is 150 million kilometres from the Sun..