Layers of the Earth
What is the outermost layer of the Earth called?
The crust
What are large flat or gently rolling areas located below 200 meters above sea level called?
The plains
What percentage of the Earth's surface does the oceanic crust occupy?
71%
What natural disaster happens when tectonic plates suddenly move and shake the ground?
An earthquake (or tsunami)
Which layer is made mostly of molten rock called magma?
The mantle
Mountains are usually grouped into large groups called....
What are the names of the 5 oceans?
Pacific, Atlantic, Indian, Antarctic, and Arctic
What process forms mountains when lithospheric plates collide or separate?
Which layer of the Earth contains very dense materials, especially iron?
The core
What is an elevated plain above 200 meters called?
A plateau
THIS QUESTION IS WORTH DOUBLE POINTS (600)!!
What is a group of islands that form a set called?
(The word comes from Greek, meaning a "chief sea" or "chief islands")
An archipelagos
What are cracks in the Earth's crust through which magma and gases from the Earth's interior escape to the outside?
Volcanoes
What is the outer layer formed by the crust and the upper part of the mantle called?
The lithosphere
What is a low-lying area of land surrounded by higher ground?
(They are caused by the sinking of a block of the Earth's crust)
Depression
Name the continents
Europe, Asia, the Americas, Africa, Oceania, Antarctica
What is the relief formed by?
By the actions of Earth's internal forces
What theory explains the movement of the Earth's plates over the mantle?
The theory of continental drift
Estuaries and fjords (Inlets)
Define the word island
Emerged lands surrounded by water, smaller than the continents.
Define a tsunami
Huge waves caused by underwater earthquakes due to the sudden shaking of tectonic plates. They originate from the collision between two plates.