1. Summarize advances over time in determining the age of the Earth‚ including the importance of the discovery or radioactivity. Herodotus counted layers of earth near the Nile River in 450 B.C.E. The Bible was used in the Middle Ages to compute the age of the Earth. The 18th and 19th centuries brought a more scientific look into determining the age of the Earth by studying the salinities of the oceans‚ the rates of sedimentation‚ and models of cooling of different materials in order to calculate
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7.2 vocab * Alluvial fan- a fan shaped deposit of sediment formed when a streams slope is abruptly reduced * Playa lake- a flat area on the floor of an undrained desert basin (playa) that fills and becomes a lake after heavy rain 7.2 outline * Weathering in Deserts: Although chemical weathering occurs in deserts‚ mechanical weathering is far more dominant in shaping desert landscapes. * Water in Deserts: In desert‚ water collects in streams and rivers that can deposit alluvial
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3.) List four facts that characterize the oceanic ridge system. Four facts that characterize the oceanic ridge system are: firstly‚ it represents 20 percent of Earth’s surface‚ the oceanic ridge system winds through all major ocean basin like the seams on a baseball. Ridges vary in width from 600 miles to 2500 miles. The mid-ocean ridge represents an area where‚ lithospheric plates move apart and new crust is created by magma pushing up from the mantle . Also‚ the mid-ocean ridge system is an example
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Chapter 1 1.1 Earth Science & the Earth System -Earth science is the study of Earth and the processes that shape it -The earth system is composed of four principal components: atmosphere (air‚ weather)‚ hydrosphere (water‚ ice)‚ biosphere (plants‚ animals)‚ and geosphere (land‚ rocks). - Earth science can be broadly defined as the investigation of interactions among the four parts of the earth system. - The second largest earthquake ever recorded buckled the seafloor west of Sumatra‚ Indonesia
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What is Earth Science? Earth Science - The study of the Earth and its neighbors in space. It is an exciting science with many interesting and practical applications. Some Earth scientists use their knowledge of the Earth to locate and develop energy and mineral resources. Others study the impact of human activity on Earth’s environment and design methods to protect the planet. Some use their knowledge about Earth processes such as volcanoes‚ earthquakes and hurricanes to plan communities that will
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Earth Science Vocab Unit 4 Celestial Objects-A natural object which is located outside of Earth’s atmosphere‚ such as the Moon‚ the Sun‚ an asteroid‚ planet‚ or a star. Arc- a continuous portion of a circle Constellation-A group of stars forming a recognizable pattern that is traditionally named after its apparent form or identified with a mythological figure. Apparent daily motion- Objects in the sky appear to rise in the East and set in the West each day. This apparent daily motion
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diagrams‚ etc). You will earn points as well as have a great study guide for your exam. Chapter 1 Earth science may include the study of: (there are 5) 1. Atmosphere. 2. Biosphere. 3. Hydrosphere. 4. Geosphere. 5. Pedosphere. Geology is the study of what? and can be broken into several sub-disciplines become familiar with at least two sub-disciplines. Geology is the study of the Earth‚ the materials of which it is made‚ the structure of those materials‚ and the processes acting upon them
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Earth’s surface? Tides on Earth’s surface are caused by the moon’s gravitational pull as well as the Sun’s gravitational pull. However‚ the Sun’s gravity is much weaker on Earth’s surface than the moon’s gravity since the Moon is much closer to Earth than the Sun. 8. Describe one factor that affects the height of the tides in a particular area. One factor that affects the heights of tides in a particular area is because of the nature of the sea floor‚ and how deep or shallow the
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lives in mankind’s most noble goal: the search for truth and understanding. They will be mourned by their families and friends; they will be mourned by the nation; they will be mourned by the people of the world; they will be mourned by a Mother Earth that dared send two of her sons into the unknown. In their exploration‚ they stirred the people of the world to feel as one; in their sacrifice‚ they bind more tightly the brotherhood of man. In ancient days‚ men looked at the stars and saw their
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4. Describe the difference in stellar evolution of stars the size of our sun with that of stars 4+ times larger than our sun. Include all of the steps and the causes of each step. A nebula‚ an immense cloud of hydrogen gas and dust‚ condenses into smaller regions of matter. On occasion‚ one of these regions collapses under the force of its own gravitational attraction‚ often triggered by an outside force‚ like a nearby supernova-an explosion of a star. After the collapse of a cloud‚ atoms begin
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