1. CIENCIAS DE LA NATURALEZA 1º DE E.S.O. PRIMER TRIMESTRE FIRST TERM Chapter 2: The Earth in the universe http://forums.yoyogames.com/forums/3/topics/62440https://planetary.org/images/Blue_Dot_big.jpg Planet Earth seen from the Voyager 1 in 1990

2. 2.6. Las capas de la Tierra y sus recursos 2.6.1. The Earth´s layers and their origin The early Earth was liquid 4.500.000.000 years ago

3. 2.6. Las capas de la Tierra y sus recursos 2.6.1. The Earth´s layers and their origin Materials with highest density were atracted to the center. Materials with lower density went to the external part of Earth

4. 2.6. Las capas de la Tierra y sus recursos 2.6.1. The Earth´s layers and their origin http://www.thelayeredearth.com/?gclid=CJ2n6KGL_KsCFUMOfAodoA9qmQ The earth consists of several layers. The three main layers are the core, the mantle and the crust. Geosphere

5. 2.6. Las capas de la Tierra y sus recursos 2.6.1. The Earth´s layers and their origin http://www.thelayeredearth.com/?gclid=CJ2n6KGL_KsCFUMOfAodoA9qmQ Layers less dense than those of the geosphere: water and air Hydrosphere/ Atmosphere

6. 2.6. Las capas de la Tierra y sus recursos 2.6.1. The Earth´s layers and their origin http://www.thelayeredearth.com/?gclid=CJ2n6KGL_KsCFUMOfAodoA9qmQ All the living beings Biosphere

7. 2.6. Las capas de la Tierra y sus recursos 2.6.1. The Earth´s layers and their origin Inner Core – 1200 km made of solid Fe, Ni. Inner Core – 1200 km made of solid Fe, Ni. Outer Core – 2250 km made of liquid Fe, Ni. Outer Core – 2250 km made of liquid Fe, Ni. Mantle – 2900 km made of dense rocks. Mantle – 2900 km made of dense rocks. Crust – 5 – 40 km made of solid lighter rocks. Crust – 5 – 40 km made of solid lighter rocks. http://www.bbc.co.uk/ news/uk-14678004 What is new?

8. 2.6.1. The Earth´s resources Composition for the exam: My ecological footprint and the earth´s resources http://myfootprint.org/ Calculate here your ecological footprint. Do it in presence of an adult. Don´t write any personal data