Geology
bNo1
"Magma" is the scientific name for lava.
D5Wm
The hottest part of Earth (its core) is solid.
Vkgy
"Cost" is one of the "4 C's" of diamond grading.
DnEd
The "Ring of Fire" - where most volcanoes are located and most earthquakes occur - encircles the Pacific Ocean.
bQWG
Every 60-110 minutes, the geyser known as Old Faithful spews thousands of gallons of what into the air?