Volcanoes
What type of volcano has gentle broad slopes?
Shield Volcano
What type of volcanic rock is glassy and forms from rapid cooling?
Obsidian
What is the color and crystal structure of pyrite?
Color: gold, bronze, yellow, etc.; Cubic crystal strucute
Name for a coarse grain, intrusive, felsic igneous rock?
Granite.
What type of lava comes out of stratovolcanoes?
High-viscosity felsic lava
What are the two technical terms for the measure of a rocks "stickiness" and how many holes it has?
Minerals that have a high concentration of a certain element, typically a metal, are called?
Ore
What is the main reason that intrusive igneous rocks have larger crystals (coarse grained) while extrusive igneous rocks do not?
Cooled slowly underground.
What two elements is lava primarily composed of?
Oxygen and Silicon
What is the most common type of volcanic rock on Earth?
Basalt
What is the crystal structure of halite?
Cubic structure (salt)
Two most common elements in the Earth's core?
Iron and Nickel
What are the two ways that earthquakes are associated with volcanic activity?
Shifting tectonic plates and magma intrusion.
Which volcanic rock is lightweight and can float in water?
Pumice.
How are geodes formed?
Mineral-rich water depositing minerals in existing rock cavities.
What is a sheet-like body of rock that cuts through pre-existing rock layers?
Dike and/or Sill
How can low-gas, mafic lava create a crater or caldera?
Collapse of the magma chamber.
What type of volcanic rock is dark, porous, and commonly found around cinder cone volcanoes?
Scoria.
What is the name for a silky band of light caused by aligned inclusions; Tiger’s Eye exhibits this property.
chatoyancy
Name for a course grain, intrusive, mafic igneous rock?
Gabbro