Igneous Rocks
igneous rocks are formed when ________ (inside the Earth) reaches the Earth's surface and cools.
magma
What we call a volcano that is never going to erupt again
extinct
How many continents are there?
7
What is a scientist that studies earthquakes called?
seismologist
Molten rock above Earth's surface
lava
The chain of volcanoes that surrounds the Pacific Ocean
Ring of Fire
The scientist that proposed the concept that continents move (first and last name)
Alfred Wegener
The term that means rocks are constantly changing into other rocks
rock cycle
There are two categories of igneous rock. What are they?
extrusive and intrusive
Where do volcanoes and earthquakes occur?
plate boundaries
The type of plate boundary that occurs when plates move away from each other
divergent
The layer of the Earth below the lithosphere that the plates move around on
The category of igneous rocks that produce small crystals
extrusive
The type of volcano that produces the biggest eruption and look like large, steep-sided cones that have a crater at the center (aka Mt. Rainier)
stratovolcano
The theory that Pangaea existed and the continents eventually moved away from each other to their current locations
continental drift
heat and pressure
Name 3 types of igneous rock.
granite, pumice, obsidian, basalt, gabbro, tuff, scoria, etc...
The word that means "anything to do with the structure or movement of Earth’s crust"
Tectonic
The types of currents in Earth's mantle that act as a conveyor belt for plates: less dense material rises when it gets hot and then sinks as it cools
convection
Transform boundaries can produce a ________, or a ridge on the ocean floor. There is a famous one in California.
fault