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When magma cools earth's surface what type of crystalline structure is usually found?
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∙ 12y ago
obsidian
Wiki User
∙ 12y ago
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Why are there are almost no extrusive ultra basic rocks in earths crust?
There are almost no extrusive rocks on the earths surface because they are all under the earths surface. They are mainly lower than the earths surface.
How do fossils provide evidence for moving plates?
Their evidence comes from rocks at earths surface.
Is mount novarupta responsible for any of earths surface changes?
is mount novarupta responsible for any of earths surface changes
What is a number of rigid but moving pieces of earths surface?
Lithospheric plates are a number of rigid but moving pieces of earths surface.
What term refers to magma at the earths surface?
Magma once it reaches the earths surface is called lava.
What is a long depression in earths surface that usually contains a river?
a valley
Why is difficult to determine earths structure?
Because Earth is very very large and we live just on the very surface.
What are 5 Characteristics an earths material must have to be called a mineral?
For a material to be a mineral, it has to have these requirements: 1. It has to be a solid. 2. It has to be formed in nature. 3. It has to have a crystalline structure. 4. It has to have a definite chemical makeup. 5. It must be inorganic.
What percent of the earths surface is the US?
100
How much of earths oceans cover earths surface?
70% or 80% of water covers the earths surface
Does the outer core cover earths surface?
No the crust covers earths surface
Why are map projecters needed?
to draw the earths surface.
Where do earthquakes usually occurr?
Earthquakes ussually occur near the tectonic plates which cover the earths surface.
Why are there are almost no extrusive ultra basic rocks in earths crust?
There are almost no extrusive rocks on the earths surface because they are all under the earths surface. They are mainly lower than the earths surface.
What forces below earth surface shape landforms?
The tectonic plates below earths surface shape earths landforms
How does weathering and erosion shape earths surface?
Weathering and erosion shape earths surface by changing earths surface by having extreme forces that change earth.
What Continuous movement of water from Earths surface to the and back to earths surface?
it is water cycle
