Scientists<span> can tell by observing the seismic waves that are recorded all over the surface of the </span>earth<span> from distant earthquakes. The seismic waves are reflected (bounced off) </span>layers<span> of different density, and they are refracted (bent) when they enter </span>layers<span> of different density.</span>
I think the answer is letter C I am so sorry if I am incorrect
Answer:
Afghanistan's mountains have kept the country from ever being invaded.
Explanation:
Afghanistan is a country in terrible conditions, and this is not the case just nowadays but it has been like that for a very long time. Despite all of the internal troubles of the country and it seems to be very weak in pretty much every sector, it has never been invaded in the past few centuries, and very rarely in the more distant history and always it has been short-lasting.
The main reason for this has been the mountains and the general geography of the country. Very high and rugged mountains are separating the country from potential invaders. Even if an invading force manages to go through the mountains, it will suffer great losses just by doing so, and what comes next is desert and more rugged terrain, which will further damage them, so by the time they engage in battle, they will be too weak to conquer Afghanistan.
The main crop would be corn because it's mostly warm there all year round!
Along the Juan de Fuca Ridge, volcanoes produce oceanic crust. The Juan de Fuca Plate cools, grows denser, and finally sinks beneath the less dense North American Plate at the Cascadia Trench as it wanders eastward.
<h3>Is the Juan de Fuca Plate dying?</h3>
Because the decaying Juan de Fuca plate is not sinking silently, scientists have a unique opportunity to investigate such impacts. They are intently observing the system's every tremble and burp. (We learned that a strong earthquake broke a tectonic plate in half in this way.)
<h3>How Fast Is Juan de Fuca moving?</h3>
The Farallon Plate, a much bigger oceanic plate that originally existed alongside the smaller Juan De Fuca Plate, is moving east-northeast at a rate of 4 cm (1.6 inches) each year.
<h3>What is happening between the Gorda Plate and the Pacific Plate?</h3>
At a rate of 5 cm per year, the Pacific Plate is diverging from the Gorda Plate as it moves in a northwesterly direction. At a much slower rate of 2.5 to 3 cm per year, the Juan de Fuca Plate (which includes the Gorda Plate) is subducting beneath the North America Plate.
Learn more about Juan de Fuca visit:
brainly.com/question/12534548
#SPJ4
