The basic theory of plate tectonics is that along seafloor spreading zones, the continents are separating from one another. As they spread apart, magma comes to the surface and becomes new continental crust. As the tectonic plates move away from spreading zones, they collide with one another.
Answer:
Climate change is a very bad problem caused by us humans. Our carbon footprint has caused polar ice caps to melt, sea level to rise, and weather to get hotter. Climate change is mostly caused by big factories that emit chemical smoke into the atmosphere. This change change is also caused by the carbon dioxide that is produced by cars. One way people could reduce climate change is by using electric cars or by taking the bus more often.
Explanation: Hope that helps :)
Everything in Earth's system can be placed into one of four majorsubsystems: land, water, living things, or air. These four subsystems are called “spheres.” Specifically, they are the lithosphere (land), hydrosphere (water), biosphere (living things), and atmosphere (air). Each of these four spheres can be further divided into sub-spheres.
