Geology.
Another word for Earth's outer surface is "crust."
environmentalist
lava
Those letters will spell the word elevation.
The word hematology refers to the study of blood.
The science which records facts about the Earth's surface is called geology.
Lava. Note: Magma cant erupt, volcanoes do. Magma is just the word for molten rock beneath the earths surface, lava is for molten rock above the earths surface.
Dermatology is the Greek root word that is most likely to mean the study of skin. The word "derma" refers to skin, and "logy" refers to the study of something.
liquid
"Heograpiya" is a Tagalog word that means "geography" in English. It refers to the study of the Earth's surface, climate, vegetation, population, and other physical features of a region.
terrain
claudere