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Earth's Interior

Earth Science

QuestionAnswer
Inferred. An educated guess.
What is the pressure range from the crust to the Earth's center? 0-3.6 million atmospheres.
As depth increases, pressure ______. This is a _______ relationship. Increases, direct.
What is the temperature range from the crust to the Earth's center? 0-6,300 degrees Celsius.
As depth increases, temperature ________. This is a _______ relationship. Increases, direct.
Density of the crust. 2.7-3 g/cm.
Density of the mantle. 3.4-5.6 g/cm.
Density of the outer core. 9.9-12.2 g/cm.
Density of the inner core. 12.8-13.1 g/cm.
As the depth increases, density _______. This is a _____ relationship. Increases, direct.
Why is the inner core more dense than the outer core? The inner core has a greater pressure than the outer core, which makes it more dense.
Why is the stiffer mantle solid? The stiffer mantle's temperature is less than its melting point.
Why is the outer core liquid? The outer core's temperature is more than its melting point.
What is the pressure inside the Earth at 4,000 km depth? What layer are you in? 2.3 million atmospheres, outer core.
What is the temperature inside the Earth at a depth of 1500 km? 3,600 degrees Celsius.
You are looking to go through the asthenosphere. How far down do you need to dig? What will the temperature be when you reach it? 600 km, 2,600 C.
Your barometer reads 1 million atmospheres. How far down are you and in which layer? 2,400 km, stiffer mantle.
Which 2 elements make up most of the Earth's crust? Oxygen and Silicon.
How many elements make up Earth's crust? Eight.
What is the average density of planet Earth? 5.5 g/cm.
Continental Drift Theory: Proposed by _____ ______ in 1912, 250 million years ago all of the continents were combined into one super continent called ______, the continents gradually drifted ____ into the continents there are today. Alfred Wegener, Pangaea, apart.
What is some pieces of evidence that prove Continental Drift? Continents fit together like a puzzle, identical plant and animal fossils found on the coastlines of different continents, same rock patterns found in all of the continents, tropical plants are found in Antarctica, glaciation- same time.
Why did scientists deny Wegener's theory? He couldn't say why the continents moved.
What causes continental drift? Sea floor spreading.
What causes sea floor spreading? The core is hot, which causes a convection current in the mantle.
What makes one object more dense than another? If an object is more compact, it is more dense.
When does an object float? When its density is less than one.
When does an object sink? When its density is greater than one.
What lead to the investigation of sea floor spreading? SONAR discovered a ridge.
What did Harry Hess discover? Hundreds of flat topped mountains, perhaps sunken islands, shaped the ocean floor.
How do magnetic polarity reversals show sea floor spreading? Each piece of sea floor rock is attracted to the opposite pole as the one next to it.
How do convection currents cause sea floor spreading? Hot rock rises because it is less dense, heated by the Earth's core, near the surface the rocks spread in opposite directions, it loses heat and then cool, causes continents to move.
How does the age of the sea floor show sea floor spreading? The closer you are to the center of the crust, the younger the sea floor rock is, the two sides are reflections of each other.
Created by: emarciante8
 

 



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