SOLAR SYSTEM

Detailed explanation-1: -1) Energy for Earthquakes comes from radioactive energy in Earth’s mantle. Radioactive decay produces heat that causes convection in the mantle.

Detailed explanation-2: -Volcanoes can also form above a column of superheated magma called a mantle plume. This may happen in areas that are distant from plate boundaries. It is also referred to as hot spot or intraplate volcanism.

Detailed explanation-3: -About 80% of earthquakes occur where plates are pushed together, called convergent boundaries. Another form of convergent boundary is a collision where two continental plates meet head-on.

Detailed explanation-4: -The most widely accepted model of planetary formation is known as the nebular hypothesis. This model posits that, 4.6 billion years ago, the Solar System was formed by the gravitational collapse of a giant molecular cloud spanning several light-years.

Detailed explanation-5: -Oceanic crust (basaltic) is thinner and denser than thick and buoyant continental (granitic) crust.