The Roman government had a republic and some of there principles like electing a leader its still used in the American government today.
They form Germany's southern border
Answer:
b. grains traveling short distances (approximately 1 m) in the air
Explanation:
Wind is a very efficient erosion agent, and its action, particularly in areas of arid, semi-arid and desert climates, is responsible for transporting and depositing large volumes of sediments with the development of a typical wind landscape.
The diameter of the sand grains transported by the wind averages between 0.15 and 0.30 mm, with some fine grains up to 0.006 mm, all particles smaller than 0.006 mm are classified as dust. A grain the size of the dust is carried high in the air and a grain the size of the sand is carried forward near the ground by jumping (see figure 1). As the particle size increases, the attraction of gravity and air resistance also increase.
The soil surface particles are transported by the wind in three ways:
- By drag: the thickest particles (500 - 2000 microns).
- By saltation: medium particles (100-500 microns).
- In suspension: the smallest and lightest particles (<100 microns, 0.2 mm).
The <u>saltation</u> moves the particles by small jumps, in the direction of origin of the wind and normally does not remove them more than 1 centimeter above the ground. An individual grain rolls forward driven by the wind, until it bounces with a second grain. Once in the air, it is carried forward by the wind and drawn to the ground by gravity. It follows a parabolic path falling on the ground with an angle between 10º and 16º, and usually traveling short distances.
Features that are typical for the divergent plate boundaries are:
- <em>ocean ridges;</em>
Underwater mountain chains that are very long and are marking the border of the plates.
- <em>formation of new crust;</em>
Since the crust is very weakened and loose, the high temperature, pressure, and magma, are able to penetrate it and create new crust.
- <em>intense volcanic activity;</em>
The high amount of magma penetrating from the mantle layer is causing intense volcanic activity, thus the creating on new crust, and underwater mountain chains.
