Four major parts of Earth work together as a complex system: rocks, water, air, and life.
The four parts are called the geosphere,hydrosphere<span>, </span>atmosphere, and biosphere.
Rocks- Geosphere
Water- Hydrosphere
Air- Atmosphere
Life- Bioshpere
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In April of 1869, he obtained a patent for one of his most important inventions, the air brake. This device enabled trains to be stopped with fail-safe accuracy by the locomotive engineer for the first time and was eventually adopted on the majority of the world's railroads
If a deep-ocean trench is located adjacent to a continent, active volcanoes would likely be found landward from the trench.
