The Zone of Fracture in a glacier is found in the uppermost 50 m of glacial ice. Explain why ice fractures above this depth, but not below
What will be an ideal response?
Answer: Ice in the upper 50 m of a glacier is cold and brittle, hence the breakage. However, below that point, the ice is under a great deal of pressure. This pressure allows the ice to move in a ductile manner, which seals off any fractures.
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Summarize the colligative properties of water and how salinity affects them. What will be an ideal response?
The scientific process and knowledge is based on ________
A) guesses based our personal feelings about the subject under inquiry B) the fact that all hypotheses can be proven true C) observation alone D) quantitative data alone E) a systematic process of learning about and testing our understanding of the world
The constant path that Earth travels in its orbit around the Sun describes a surface called the plane of the ____
a. equinox b. inclination c. ecliptic d. declination e. perihelion
What is the process by which the bedrock underlying a glacier is worn down by rock debris that is dragged by the moving ice?
A. glacial plucking B. glacial advance C. glacial abrasion D. glacial retreat E. glacial flour