Science
What we learned in class
Glaciers: permanent masses of ice and snow that move more than 10% of Earth's land. Antarctica, Greenland, and North Pole
Glaciers: permanent masses of ice and snow that move more than 10% of Earth's land. Antarctica, Greenland, and North Pole
Formation: cold places------ don't melt
New snow packs the old snow down.
- great accumulated weight makes glacier move.
- maybe altitude melt water under glacier
Pushes through mts. polishes/ smoothes out.
Earth Structure
Lithosphere: The lithosphere is a solid surface surrounding the earth. The lithosphere is a cool crust that surrounds the liquid and solid interior of Earth.
The rock plates that float across the surface of Earth are called tectonic plates. The plates float above the mantle, an area in between the core and the solid. It is a very important solid that can deform and move. It's very hot, but not hot enough to be a liquid rock. There are places where magma seeps to the surface, but that mantle in basically a plastic-like solid that can slowly swirl and move around the planet.
Liquid and Solid core: The core has 2 different regions. The liquid outer core and a solid inner core.
Both layers and made up of iron and nickel. The inner core is a giant furnace at super hot temperatures and pressures. The flowing metal of the outer core helps create a dynamo effect. In case of the Earth, the magnetic field protects our planet from space, solar wind, and solar radiation.
Scientists have discovered that the pressure and temperature increase as you move towards the center of the planet. The outer core of the Earth has very hot temperatures and extreme pressures that keep iron and nickel in a liquid state. The mantle has a range of 500 to 4,000 degrees Celsius. Room temperature is about 23 degrees Celsius.
Liquid and Solid core: The core has 2 different regions. The liquid outer core and a solid inner core.
Both layers and made up of iron and nickel. The inner core is a giant furnace at super hot temperatures and pressures. The flowing metal of the outer core helps create a dynamo effect. In case of the Earth, the magnetic field protects our planet from space, solar wind, and solar radiation.
Scientists have discovered that the pressure and temperature increase as you move towards the center of the planet. The outer core of the Earth has very hot temperatures and extreme pressures that keep iron and nickel in a liquid state. The mantle has a range of 500 to 4,000 degrees Celsius. Room temperature is about 23 degrees Celsius.
Earth Structure: Tectonics
Tectonic plates make up the top layer of the Earth named the lithosphere. Directly under the lithosphere is the asthenosphere. There is an on-going heat and radiation given off from the core of the Earth. The tectonic plates are floating above the molten rock and moving around the planet. When the plates and continents and plates move it's called continental drift.
Think of the molten rock in as the asthenosphere, not as rock, but as a liquid. It has currents and flows like any normal liquid. When the tectonic plates spread apart, it's called a spreading center. When the tectonic plates move closer together, it's called a subduction zone. When the tectonic plates are forced together, it called a zone of convergence. If plates move down into the asthenosphere the plates begin to melt.
Scientists have traveled all over the world and found evidence that supports the ideas of plate tectonics. Did you ever notice that South America and Africa look like the go together. South America, Africa, and all the other continents went together to make one gigantic continent called Pangea. But, because of tectonics plates around the world, Pangea was split apart into smaller separate continents.
Tectonic plates make up the top layer of the Earth named the lithosphere. Directly under the lithosphere is the asthenosphere. There is an on-going heat and radiation given off from the core of the Earth. The tectonic plates are floating above the molten rock and moving around the planet. When the plates and continents and plates move it's called continental drift.
Think of the molten rock in as the asthenosphere, not as rock, but as a liquid. It has currents and flows like any normal liquid. When the tectonic plates spread apart, it's called a spreading center. When the tectonic plates move closer together, it's called a subduction zone. When the tectonic plates are forced together, it called a zone of convergence. If plates move down into the asthenosphere the plates begin to melt.
Scientists have traveled all over the world and found evidence that supports the ideas of plate tectonics. Did you ever notice that South America and Africa look like the go together. South America, Africa, and all the other continents went together to make one gigantic continent called Pangea. But, because of tectonics plates around the world, Pangea was split apart into smaller separate continents.
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