How do glaciers form and how do they move?
What will be an ideal response?
Answer: Glaciers form in climates cold enough that snow recrystallizes into ice. As snow accumulates, the underlying ice thickens until it becomes so heavy that the forces of gravity cause the glacier to move downslope. Glaciers move by a combination of basal sliding and plastic flow.
You might also like to view...
Can an object's velocity change direction when its acceleration is constant?
A) Yes, this is possible, and a rock thrown straight up is an example. B) No, this is not possible because it is always speeding up. C) No, this is not possible because it is always slowing up. D) Yes, this is possible, and a car that starts from rest, speeds up, slows to a stop, and then backs up is an example. E) No, this is not possible because it is always speeding up or always slowing down, but it can never turn around.
What important change in the Sun over the past four billion years is thought to be very important to understanding the climates of Venus, Earth, and Mars?
A) a gradual weakening of the solar wind with time B) a gradual dimming with time C) a gradual brightening with time D) a gradual reduction in the amount of ultraviolet and X-ray radiation coming from the Sun
The work performed as a function of time for a process is given by W = at3 where a = 2.4 J/s3. What is the instantaneous power output at t = 3.7 s?
A) 99 W B) 69 W C) 138 W D) 207 W
An atom that has more electrons than protons is a ______________ ion
a. neutral b. positive c. negative d. polyatomic