1. POPULATION 2. • World Birth Rate 24/1000 3. • U.S. Birth Rate 14/1000 4. • PA Birth Rate 13.7/1000 5. • U.S. Teenage Birth Rate 21/1000 ages 15 - 17 (A decline…

Slide 1What is a planet made of? Slide 2 One way in which scientists look at what a planet is made of is by looking at density Slide 3 Let’s look at the density of the…

NOTES: Earth: Age--4.6 billion years by radioactive isotope dating. Atmosphere--80% Nitrogen, 20% Oxygen, trace of Carbon Dioxide. Pressure = 14.7 lbs/sq in. Originally lots…

Earthquakes And Earthâs Structure Earthâs Structure Origin of the Earth Meteors and Asteroids bombarded the Earth Gravitational compression Density Stratified planet Earthâs…

Density and Planetary Differentiation Planetary Differentiation is the separating of a planet into different layers due to differences in density. Seismic waves tell scientists…

Slide 1 Orbit & Rotation: Like the other planets in the solar system, Mars travels around the sun in an elliptical (oval) orbit. But the orbit of Mars is slightly more…

Slide 1 Starter: Compare the life cycle of a star with that of a human. 2/22-25/2013 145 146 2/22-25/2013 Exit: If there are more low-mass stars than high-mass stars in the…

Earthquakes And Earthâs Structure Earthâs Structure Origin of the Earth Meteors and Asteroids bombarded the Earth Gravitational compression Density Stratified planet Earthâs…

The official death toll to about 2,800 but the Miyagi police chief has said that more than 10,000 people are estimated to have died in his province alone. http://www.bbc.co.uk/news/world-asia-pacific-12729485…

Slide 1 Planet Mars By: Melissa Neal October 5, 2010 Fun Facts About Mars Fourth planet from the Sun One of Earthâs next door neighbors 4.6 billion yrs old Smaller and less…