What Happens to the Land Surface When Large Ice Sheets

question 84

Multiple Choice

What happens to the land surface when large ice sheets melt away?

• A) it subsides because there is less ice on top
• B) the land surface remains unchanged but seems lower because of the loss of ice
• C) the land flexes upward due to isostatic rebound
• D) the land rises because the rocks are warmer without the ice

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Definitions:

Sacrum And Coccyx

The sacrum is a large, triangular bone at the base of the spine, above the coccyx or tailbone, which is a small, triangular bone at the very bottom of the spinal column.

Vertebral Column

The series of vertebrae extending from the skull to the small of the back, encasing the spinal cord and providing support to the body.

Thoracic Cage

The bony and cartilaginous structure forming the skeleton of the thorax, protecting vital organs and assisting in respiration.

Costal Cartilages

Bars of hyaline cartilage that extend from the ends of the ribs to the sternum, contributing to the elasticity and expansion capability of the rib cage.