What is a difference between a caldera and a crater?
What will be an ideal response?
Ans: A caldera is a large depression caused by collapse after a large-scale eruption, whereas a crater is a small, steep- sided, volcanic depression bored out by an eruptive event.
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Which explanation best describes how oceanic crust is formed?
A) Continental crust is swallowed by the sea at subduction zones. B) Oceanic crust is extracted from the mantle by partial melting and crystallization. C) Oceanic crust crystallizes in the core and is pushed up through volcanic pipes. D) Oceanic crust formed when magma ocean cooled and has remained unchanged except around plate boundaries and at hot spots.
A functional region is:
A) derived from people's sense of identity and attachment to different areas. B) non-existent in developing nations. C) an area that possesses one or more unifying cultural or physical traits. D) an area unified by a specific social, cultural, or economic activity. E) an area that possesses only one specific cultural trait.
The turbulent water created by breaking waves is called surf
Indicate whether the statement is true or false
Currently, the number of years required for the world's population to double is approximately:
A. 53 years B. 73 years C. 43 years D. 13 years E. 93 years