Earth Science Igneous Rocks Objectives
Upon completion of the lab activities, homework, and reading
assignments, each student should be able to:
1. Describe conditions in the Earth that cause rocks to melt.
a. What are the sources of heat in the Earth?
b. What effect does temperature have on melting of
mixtures?
c. What effect does pressure have on melting?
2. Explain how texture (crystal size) indicates where a rock
forms.
3. Explain how the minerals in a rock (composition) indicate where
the magma came from that formed the rock.
4. Construct, explain, and use a table for the identification of
common igneous rocks.
5. Identify specimens of common igneous rocks.
6. Explain the meaning of the following vocabulary words:
Granite
Diorite
Gabbro
Obsidian
Differentiation
Composition
Intrusive
Porphyry
Magma
Rhyolite
Andesite
Basalt
Pumice
Texture
Extrusive
Vesicles
Magma Chamber
Lava