EARTH'S MECHANISM

. What is the source of heat generated by the core to the mantle?

• molten metals

• molten rocks

• decayed radioactive elements

• gases

In a convection current, hot materials move ______________.

• downward

• upward

• sideward

• any direction

The region in which one plate moves under another is _______________.

• vent

• magma chamber

• subduction zone

• rift valley

The plastic-like upper portion of the mantle is called ______________.

• the asthenosphere

• the magma

• the core

• the lithosphere

. Scientists believe that the motion of tectonic plates is caused by ______________.

• pressure in Earth’s crust

• conveyor belts

• convection currents

• heat in the Earth’s core

Which of the following is NOT a driving force of tectonic plates? A. ridge push B. slab push C.D.

• mantle convection

• drag force

• slab pull

• ridge push

What is the source of heat in a mantle convection current?

• the Sun

• the crust

• the core

• the moon

. A convection current is caused by differences in temperature resulting to variation in ___________.

• air pressure

• mass

• density

• color

The motion of gas or liquid caused by differences in temperature is a _________.

• tectonic movement

• plate tectonic

• convection current

• magma chamber

Tectonic plates ride on ________________.

• inner core

• asthenosphere

• outer core

• lithosphere