How do barrier islands form? What are the hazards associated with them? Why is it generally unwise for humans to inhabit them?
What will be an ideal response?
Barrier beaches are long, narrow depositional features that form offshore. When they widen, they become barrier islands. Barrier islands are quite common, occurring offshore of nearly 10% of Earth's coastlines.
Various hypotheses explain the formation of barrier islands. They may begin as offshore bars or low ridges of submerged sediment and then gradually migrate toward shore with wave action.
Human-built structures on barrier islands are vulnerable to erosion and redeposition of coastal sediments by tropical storms and rising sea level.
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What sedimentary structure is illustrated in this photograph? What direction (toward the left or the right) were sediment-transporting currents flowing when the sediment was deposited?
What will be an ideal response?
Permanent streams in desert regions are rare, and when they do occur, ________
A) they get their water from wadis and arroyos B) they have numerous tributaries to keep them supplied with water as they cross the desert C) they originate outside of the desert region and have few tributaries in the desert D) they originate in a glacier region
The Southern Hemisphere is also referred to as the water hemisphere
Indicate whether the statement is true or false
Captain James Cook's first expedition in 1768 was aboard the HMS Endeavour
a. True b. False