Earth's Internal Heat Quiz

A _____________ is an opening in the Earth’s crust that allows molten rock from beneath the crust to reach the surface.

• cave

• fault

• sinkhole

• volcano

Convection in the mantle is driven by the _______________________.

• earthquakes in the crust

• heat from the Earth’s core

• Earth’s magnetic field

• movement of tectonic plates

One source of the Earth’s internal heat is the remaining energy from the time ___.

• it was formed

• of the Big Bang

• when the Sun was formed

• the Solar System was formed

Another major source of the Earth’s internal heat is _________________________.

• radioactivity

• radiation from space

• global warming

• volcanoes in the core

One of the mechanisms for magma formation in ______________ is flux melting.

• shear zones

• subduction zones

• divergent boundaries

• convergent boundaries

Unstable isotopes in the Earth’s interior release energy when they ______________.

• change to vapor

• increase in temperature

• undergo convection

• undergo radioactive decay

During convection, the cooler mantle rock _____ and the hotter mantle rock _____.

• rises; melts

• solidifies; melts

• sinks; rises

• sinks; solidifies

The unstable isotopes that release energy in the Earth’s interior are _________.

• nickel, carbon, and silicon

• chromium, tritium, and cobalt

• iron, plutonium, and technetium

• uranium, potassium, and thorium

Heat transfer melting generates magma because rising hot materials transfer heat and __________________ the surrounding rocks.

• decrease the pressure on

• decrease the temperature of

• increase the pressure on

• increase the temperature of

Partial melting of rocks refers to __________________________.

• the melting of a whole body of rocks

• a very slow process of melting rocks

• the melting of some components of rocks only

• a process of melting rocks using different chemicals