1404_Ch 19 Assignment Done

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Lone Star College System, Woodlands *

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1404

Subject

Geology

Date

Dec 6, 2023

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docx

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5

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PHYS 1404: Chapter 19 – Earth: The Active Planet – Assignment © 2018-2023 Lone Star College. All Rights Reserved. Write your Name. Do not alter header or question numbers. Abide by LSC Academic Integrity. Name: Alexis Diaz 1. Describe the four stages of development for terrestrial planets. a. Differentiation: This stage involves the planet's interior becoming separated into distinct layers. b. Cratering : After the initial formation and differentiation, terrestrial planets often go through a phase of heavy bombardment by asteroids, comets, and other celestial objects. c. Flooding : Flooding is a stage that occurs when geological activity, such as volcanic eruptions or tectonic processes, brings molten rock or subsurface water to the planet's surface. d. Surface Evolution: Surface evolution is an ongoing process that includes various geological and atmospheric interactions. 2. Describe things that make the Earth unique compared to the rest of the planets in the solar system? a. its distance from the Sun b. its 24-hour rotation period 3. Describe each differentiated layers of Earth, from inner to outer layer. Inner Core: The innermost layer of the Earth is the inner core, which is a solid ball of iron and nickel. It is the hottest layer on the Earth. Outer Core: Surrounding the inner core is the outer core, which is a liquid layer of molten iron and nickel. It is also very hot. Mantle: The mantle is the thickest layer of the Earth. Crust: The outermost layer of the Earth is the crust, which is the
PHYS 1404: Chapter 19 – Earth: The Active Planet – Assignment © 2018-2023 Lone Star College. All Rights Reserved. Write your Name. Do not alter header or question numbers. Abide by LSC Academic Integrity. thinnest layer and is divided into two types: oceanic crust and continental crust. Oceanic crust is thinner and denser than continental crust and is primarily composed of basaltic rocks. 4. Describe how seismic waves help to show the core of the Earth being mostly liquid? The way S-waves behave when they hit the outer core shows that the Earth's core is mostly liquid. This is found out by looking at how P-waves and S-waves bend as they travel through the Earth and timing how long it takes for them to reach different places on the surface. 5. Describe the process by which the Earth’s magnetic field is generated. The Earth's magnetic field is believed to be generated by electric currents in the conductive material of its core, created by convection currents due to heat escaping from the core. 6. Explain how mountain ranges are formed and specifically how the Himalaya Mountains are formed. when two large landmasses, India and Eurasia, driven by plate movement, collided. 7. Explain how solar wind interacts with Earth’s magnetic field to create auroras at the poles. Make sure to include each part of the magnetic field the solar particles interact with. When the solar wind reaches Earth it sends a flurry of charged particles into the magnetosphere and along Earth's magnetic field lines, towards the poles. 8. What is a subduction zone? Give an example of a subduction zone on earth? Aleutian Islands, positioned near the border between two oceanic plates.
PHYS 1404: Chapter 19 – Earth: The Active Planet – Assignment © 2018-2023 Lone Star College. All Rights Reserved. Write your Name. Do not alter header or question numbers. Abide by LSC Academic Integrity. 9. What is the source of the oxygen in Earth’s atmosphere? The Ocean 10. What is greenhouse effect and how is it contributing to global warming? they absorb the sun's heat that radiates from the Earth's surface, trap it in the atmosphere and prevent it from escaping into space. 11. What is ozone, and why is its presence in the upper atmosphere important? The ozone layer prevents the harmful UV rays from entering into the earth's atmosphere. 12. What is a planet’s Albedo? the fraction of light that a surface reflects 13. Go to “current events” tab in your course. Read “Why is space so dark even though the universe is filled with stars?”. Write 10 – 15 sentence summary of this article. Olbers' paradox is a long-standing question about why space is dark despite being filled with stars. Astronomers estimate that there are around 200 billion trillion stars in the observable universe, many of which are as bright as our sun. However, the answer is not because the stars are far away from Earth. Instead, the universe is so old that the light from even the farthest stars has not reached Earth yet.As the universe is only 13 billion years old, the light from stars more distant than 13 billion light-years has not reached Earth yet. As time passes, light from these more distant stars will have time to reach us.The Doppler shift, an effect caused by the fast movement of galaxies away from Earth, pushes the light from their stars into colors the
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