What distinguishes a huge block of ice from a glacier?
What will be an ideal response?
Answer: Ice does not become a glacier until it moves under its own weight. This occurs when the ice mass reaches a critical thickness of approximately 50 meters and the weight of the overlying ice causes the ice at the base to deform plastically and flow downslope.
You might also like to view...
A 7.0-kg rock is subject to a variable force given by the equation
F(x) = 6.0 N - (2.0 N/m)x + (6.0 N/m2)x2 If the rock initially is at rest at the origin, find its speed when it has moved 9.0 m. What will be an ideal response?
Compared to the Earth, the Moon is no longer geologically active because
a. it is rotating too slowly. b. its radioactive elements were never abundant. c. it is much smaller in mass. d. its crust is too thin. e. it does not have water on its surface.
The rapid rotation in the outer disk suggests that our galaxy is more massive than previously thought
a. True b. False Indicate whether the statement is true or false
Which of the following is not a line of evidence supporting the hypothesis that our Moon formed as a result of a giant impact?
A) The Pacific Ocean appears to be a large crater—probably the one made by the giant impact. B) Computer simulations show that the Moon could really have formed in this way. C) The Moon's average density suggests it is made of rock much more like that of the Earth's outer layers than that of Earth as a whole. D) The Moon has a much smaller proportion of easily vaporized materials than Earth.