Answer:
“Crust” describes the outermost shell of a terrestrial planet. Our planet’s thin, 40-kilometer (25-mile) deep crust—just 1% of Earth’s mass—contains all known life in the universe.
Earth has three layers: the crust, the mantle, and the core. The crust is made of solid rocks and minerals. Beneath the crust is the mantle, which is also mostly solid rocks and minerals, but punctuated by malleable areas of semi-solid magma. At the center of the Earth is a hot, dense metal core.
Earth’s layers constantly interact with each other, and the crust and upper portion of the mantle are part of a single geologic unit called the lithosphere. The lithosphere’s depth varies, and the Mohorovicic discontinuity (the Moho)—the boundary between the mantle and crust—does not exist at a uniform depth. Isostasy describes the physical, chemical, and mechanical differences between the mantle and crust that allow the crust to “float” on the more malleable mantle. Not all regions of Earth are balanced in isostatic equilibrium. Isostatic equilibrium depends on the density and thickness of the crust, and the dynamic forces at work in the mantle.
Just as the depth of the crust varies, so does its temperature. The upper crust withstands the ambient temperature of the atmosphere or ocean—hot in arid deserts and freezing in ocean trenches. Near the Moho, the temperature of the crust ranges from 200° Celsius (392° Fahrenheit) to 400° Celsius (752° Fahrenheit).
Answer:
In its most general sense, the term "world" refers to the totality of entities, to the whole of reality or to everything that is. The nature of the world has been conceptualized differently in different fields. Some conceptions see the world as unique while others talk of a "plurality of worlds".
Answer:
the nature and history of landforms and the processes which create them.
Explanation:
Answer:
B. Some of the great contributors to advancement in the United States were immigrants
Explanation:
The United States is a country of immigrants, so using the term immigrants for people that moved slightly later in the country is kind of debatable. Anyway, the later immigrants in the United States had a huge impact on the country, mostly positive.
- The immigrants provided extra labor force which was in high demand, especially with the industry constantly growing.
- Numerous immigrants were people with great ideas, managing to invent new things that led to a rapid development of the United States and making them a global power. A prime example of this is the Croatian Nikola Tesla.
- The large numbers of immigrants resulted in rapid population increase, which also provided the United States with extra military power, which was crucial for its survival, interests, and further actions.
