The largest tectonic plate is the Pacific plate, measuring over 100 million square kilometres. It is known as an oceanic plate as most of its crust is below sea level. At its centre, the Pacific plate has a hot spot which is responsible for forming the Hawaiian Islands.
Tectonic plates can be up to 200 kilometres deep and are composed of the entire crust layer, most of the moho layer and a fraction of the upper mantle. Collectively these layers are known as the lithosphere. The crust layer is continually moving, like a conveyor belt, with new material pushing older material towards the plate boundary.Learn More
Earth's core has two parts, a solid iron inner core and a molten outer core, which is composed of a nickel-iron alloy. The outer core begins about 1,800 miles under the crust.Full Answer >
The Earth's magnetosphere protects the planet from solar winds and high-energy particles by redirecting this energy around the planet. When charged particles approach the Earth, the magnetosphere affects them due to their magnetic properties. Particles blown by the solar wind simply sweep around the Earth, while slower radioactive particles may become part of the Earth's radiation belts, held safely above the surface by the magnetosphere.Full Answer >
Magnetism is a phenomenon of physical science that arises due to the forces between objects brought about by the motion of electrical charges within those objects. The motion of electric charges creates a magnetic field, which exerts a magnetic force on charged particles that move within that field. A magnetic field flows from one end of an object to the other, creating a dipole with positive and negative ends.Full Answer >
The uneven heating of the Earth's surface is caused by the sun. This occurs because the Earth is a tilted sphere and the sun does not heat all its surfaces equally and because the sun's heat penetrates land and water at different rates.Full Answer >