Answer:
e. is produced by the absorption of UV radiation.
Explanation:
The thermosphere is a layer of Earth's atmosphere which is directly above the mesosphere and below the exosphere. It extends from about 85 to 500 km altitude above the earth.
In the thermosphere, the temperature is strongly dependent on the level of solar activity. When the Sun is very active and emitting more high energy radiation, the thermosphere becomes hotter by X-ray and UV radiation absorption.
Answer:
All of the lines of longitude to the west of the prime meridian until 180 degrees are in the western hemisphere. Ninety degrees west is a line that passes through North America, including Lake Superior and the Yucatan Peninsula.
Answer:
b. Cumberland Gap Middlesboro
Explanation:
Cumberland Gap Middlesboro located in the United States was considered as a "wind" gap and a low pass, which run through the long ridge of the Cumberland Mountains, situated around the Appalachian Mountains, closer to the junction of the three states namely, Kentucky, Virginia, and Tennessee.
The gap has a V-Shape, with the ridge rises to 600ft above the pass in the south, 900ft above the Pinnacle Overlook towers in the north, and 1,600ft above sea level in Cumberland Mountains.
Hence, the right answer is Cumberland Gap Middlesboro
Answer:
d. Sea level was lower than it is today due to ice on land, and rivers flowed in what are now estuaries
Explanation:
- The Tioga glaciation involves at least two or four major glacial advancements spanning the interval from 27,000 to 15,000 years ago.
- Being the largest amount of the Maximum ice extend on the plant and occurred about the 21,000 to 18,000 years ago and at that time the sea levels were low and more ice was on land.
