What processes contribute to increases in global sea level, and by how much has it gone up in the recent past?
What will be an ideal response?
Sea level increases when ice on land melts and when seawater expands as it warms (thermal expansion). Thermal expansion has accounted for most of the observed 20-cm increase in sea level over the last 130 years. The land ice that is easiest to melt is that trapped in mountain glaciers. Fortunately, there is only about half a meter of equivalent sea level rise in such glaciers. The polar ice sheets contain much more water (6 m for Greenland, ~70 m for Antarctica), but this will take much longer to melt.
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Where is there no deep scattering layer present?
A) Temperate oceans B) Tropical oceans C) Arctic oceans D) All oceans have a deep scattering layer
Heave annual snowfalls is a common occurrence in Antarctica
Indicate whether the statement is true or false
An anticline is a fold shaped like a(n) ________ with the oldest rock in the center of the fold.
A. W B. V C. cone D. arch E. umbrella