Answer:
A stream in a bedrock valley located 5000 feet above ultimate base level that is draining a mountainous region in the headwater of a stream system would have a _____.
high gradient, and a narrow and shallow channel with no floodplain
Explanation:
A bedrock valley has no alluvium mantling the bedrock over which it flows. Alluvium (consists of sand, gravel, silt, clay, and gravel, as well as other organic matters) mantlings or coverings are usually developed in the lower part of the river with the formation of floodplains and deltas. They may also be deposited at lakes or river banks. Headwater streams deliver nutrients and other organic materials (e.g. fallen leaves) to downstream regions to sustain downstream aquatic life.
An important tool in understanding the actual numerical dates of past geologic events is radioactivity.
Answer:
Ultraviolet radiation and Infrared light
Explanation:
There is a low energy of the ultraviolet spectrum that reaches the surface of the Earth and is the one that causes sunburns and make it necessary to wear sunglasses. Also, infrared radiation enters the troposophere and is the one that warms the Earth surface.
Answer:
B. greater than
Explanation:
Air pressure decreases as the altitude increases.
Air pressure increases as the altitude decreases.
This means that if the air pressure of Denver, Colorado, at an altitude of about 5,000 feet above sea level, is 840mb, the sea-level pressure reported for Denver will be greater than 840 mbb.
