week 7 assignment \" Astrolabe for this week\'s assignment, please answer each o
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Question
week 7 assignment " Astrolabe for this week's assignment, please answer each of the following questions/prompts, and post them to the drop box as a single document.
1. what is earth's mantle?
2. what elements make up the earth's mantle?
3. Describe the " big splash" theory of the moon's origin?
4. How are comets different from asteroids?
6.if you grew up on the moon, would your bones be heavier or lighter than they are now?
7. Look up New Horizons space probe. where is it heading and where is it right now?
8. where are the tallest and longest moutain chains on earth? how were they formed?
9. how do we know that tectonic plates move? Describe how transform plate boundaries differ from plate boundaries?
10. on what tectonic plate do you live? how many adjacent plates are these to the one you live on? in which direction are these plates moving?
11. if the Mid-Atlantic Ridge opens up at the rate of 5 centimeters per year, how much father apart and New York be in 1,000 yera [show your work for full credit]?
12 Mount Everest is now approximately 8,850 meters tall, and it has been growing taller at a rate of about 2 Centimeters, per year. Estimate the approximate age of the mountain.
Explanation / Answer
1. The mantle is a layer between the crust and the outer core. Earth's mantle is a silicate rocky shell with an average thickness of 2,886 kilometres.
2. It is composed mostly of silicate rocks rich in magnesium and iron.
3.The Big Splash Theory is the current theory that explains the formation of the Moon. This theory states that approximately 4.5 billion years ago, the Moon was formed as a result of an object approximately the size of Mars colliding with Earth, causing less dense portions to be blasted into space. The clash created high temperatures and pressures, which in turn caused denser materials (like Iron) to become part of the Earth’s core. The less dense materials were blasted into space adding to the material orbiting the Earth. These less dense portions gravitated toward each other, creating the Moon. Evidence supporting the Big Splash Theory came from rock and soil samples taken during the Apollo landings on the Moon.
4. The main difference between asteroids and comets is their composition, as in, what they are made of. Asteroids are made up of metals and rocky material, while comets are made up of ice, dust and rocky material.
6. Lighter because of lesser gravity on the moon.
7. The spacecraft was launched with the primary mission to perform a flyby study of the Pluto system, and a secondary mission to fly by and study one or more other Kuiper belt objects (KBOs). On July 14, 2015, at 11:49 UTC, it flew 12,500 km (7,800 mi) above the surface of Pluto, making it the first spacecraft to explore the dwarf planet.
8. The Andes. 7 000 km in length, they run the length of South America and are the highest mountain range outside of Asia. The Andes were formed by tectonic activity whereby Earth is uplifted as one plate (oceanic crust) subducts under another plate (continental crust).
9. The most obvious manifestation of moving plates are earthquakes. Direct measurement of plate motions is difficult but various methods can be used like GPS, SLR etc.
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