The Oldest Rock Formations on Earth

Front

The Nuvvuagittuq Greenstone Belt is made up of metamorphic rock, so it must have been __________________ in the past.

Back

buried deep underground

Front

Rock that has formed from the cooling and hardening of liquid magma is called ______________.

Back

igneous rock, igneous

Front

The plate motion that causes both uplift and subduction is driven by _________________.

Back

energy inside Earth (from the hot core)

Front

Earth’s rocky outer layer is divided into _________.

Back

plates, tectonic plates

Front

When a rock formation is exposed to heat or pressure deep underground, it becomes _______________.

Back

metamorphic rock, metamorphic

Front

What is the process called when rocks are broken down into smaller pieces by weathering?

Back

Physical weathering or mechanical weathering.

Front

What type of rock is formed from the accumulation of sediment?

Back

Sedimentary rock.

Front

What is the term for the movement of tectonic plates?

Back

Plate tectonics.

Front

What is the main driving force behind the movement of tectonic plates?

Back

Convection currents in the mantle.

Front

What is the rock cycle?

Back

The continuous process of rock formation, breakdown, and reformation.