Most of what we know about the interior of the Earth comes from the study of seismic waves from earthquakes. Seismic waves from large earthquakes pass throughout the Earth. These waves contain vital information about the internal structure of the Earth.
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.
The stage of thunderstorm formation which is characterized by updrafts accompanied by downdrafts induced by falling precipitation is called "mature stage."
<h3>What is thunderstorm?</h3>
Thunderstorms are ferocious, brief meteorological disturbances that are nearly always accompanied by lightning, thunder, thick clouds, significant amounts of rain or hail, with strong gusts of wind.
Some characteristics of thunderstorm are-
- Layers of warmer, moist air travel in a strong updraft to cooler areas of the atmosphere, whereupon thunderstorms form.
- At that location, the updraft's moisture condenses to create imposing cumulus clouds and, subsequently, precipitation.
- Cooled air columns then descend to the ground and are met by powerful downpours and horizontal winds.
- In parallel, electrical charges build up on cloud molecules (water droplets with ice).
- When the electric charge that has collected is sufficiently high, lightning discharges happen.
- When lightning strikes, it instantly and intensely warms the surrounding air, creating shock waves that sound like thunderclaps and rolls.
- Occasionally, air vortices that are spinning and powerful enough just to create tornadoes are present with intense thunderstorms.
To know more about ingredients to a thunderstorm, here
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Answer:
An example of how language can be divisive is the dominance of French in Quebec and English in the rest of Canada.
Explanation:
A is not correct because it simply describes a family of closely related languages, which is unifying more often than not, not the other way around.
B is not correct because this statement is not true, as the United States, as all countries in the world, has official language/s.
C is correct because here we have a situation where within one country there are two dominant languages, and the people also use them in order to distinguish themselves from the others, causing tensions in the process, as well as movements toward separation.
D is not correct because such a thing may or may not be problematic, as we do have examples of both around the world.
