A geologist found a sediment deposit at the open end of a valley. After studying the deposit, the geologist concludes the sedime
nt was deposited by the front end of a glacier. There is a glacier in the valley, but it has melted back 2.5 km up the valley (see diagram below). How can the geologist estimate how long ago the glacier was in the lower part of the valley?
A.
Watch the glacier melt for a few hours, and see how long it takes for the distance between the glacier and the sediment deposit to double.
B.
There is no way to estimate this—the geologist must make a random guess.
C.
Divide the distance the glacier has melted back by the current rate at which it is melting back.
D.
Measure how long it takes for the rest of the glacier to melt, which will be the same amount of time.
Rods and cones of the human eye<span>. You can see in the drawing on the left that the back of the </span>eye<span> is lined with a thin layer called the retina. This is where the</span>photoreceptors<span> are </span>located<span>.</span>
The amount of energy at each trophic level decreases as it moves through an ecosystem. As little as 10 percent of the energy at any trophic level is transferred to the next level; the rest is lost largely through metabolic processes as heat
A person whose identity status is Diffusion has not had an identity crisis and has not yet fully realized their social identity or personal traits. Moreover, this person is not seeking to make a commitment to establish his or her identity. It is almost like identity Foreclosure; however, in that stage, the person adopts some traits and qualities of friends and parents.
