Felsic igneous rock, such as granite and rhyolite,
A) have dark coloration.
B) are not resistant to weathering.
C) have a high melting temperature.
D) are high in silicate minerals.
Question 2
Obsidian is an igenous rock with a glassy appearance and minimal crystal growth. What accounts for this?
A) Obsidian is an intrusive igneous rock that cooled slowly beneath the Earth's surface, result in little crystal growth.
B) Obsidian is an extrusive igneous rock that cooled slowly on the Earth surface, resulting in little crystal growth.
C) Obsidian is an extrusive igneous rock that cooled very slowly on the Earth surface, resulting in little crystal growth.
D) Obsidian is an intrusive igneous rock that cooled rapidly beneath the Earth's surface, result in little crystal growth.
