As magma cools it forms (_____) rock by the process of (____)

igneous and solidification

As magma cools it forms (_____) rock by the process of (____)

continental crust - Thick less dense, older made of granite. Oceanic crust - Thin more dense younger made of Basalt

Describe the 2 types of crust.

chamber of magma is stationary under a moving plate - magma solditifies at the surface

Explain how volcanoes form at hot spots.

New rock (crust) firmed at all ridges and push continents apart

How do mid-ocean ridges help support the theory of plate tectonics?

Magma and Lava

Igneous rocks can solidify from (_____) and (_____)

Melting

In order to form magma, what must happen to sedimentary, igneous or metamorphic rock? ____________________

heat and pressure

Metamorphism involves the addition of ____________ and ____________ to pre-existing rocks

1. continents fit like puzzle 2.fossils match across South America and Africa 3. rock and geological features match South America, Africa, India, Australia 4. coal deposits in Antartica

Name 4 ways Wegener supported his theory of continental drift.

The crust, Asthenosphere, mantle, outer core, inner core

Name the layers of the Earth from the surface to the center

sedmentary and comaction and Cementation

Sediments form (____) rock by the process of (_____) and (____)

Weathering and erosion

Sediments form from the process of (___________) and (___________)

Shaking of crust due to release of energy

What are earthquakes?

A matchine that records Seismic waves

What is a seismograph?

An area around the pacific ocean (plate) tetonic activity volcanos, earthquakes.

What is the Ring of Fire?

The epicenter is the location on the surface of the Earth directly above the hypocenter of an earthquake.

What is the difference between a focus and an epicenter?

convection currents in the

What is the driving force behind plate tectonics?

The idea that all the continents were joined as a single land called Pangea

What is the theory of continental drift?

Asthenosphere and outer core

Which layers are liquid? _________________________ and _________________________

weathering and erosion into sediments then compactioncemite

Which process changes a metamorphic rock into sedimentary rock?

heat and pressure

Which process changes an igneous rock into metamorphic rock?

melting into magma then solditification

Which process changes sedimentary rock into igneous rock?

Oceanic crust is consitantly being made at ocean ridges

Why is oceanic crust younger than continental crust?