题目内容

Intrusion forms intrusive rocks, which rocks have a depth of more than 3 kilometers from the surface of the Earth?

A. Plutonic rocks
B. Hypabyssal rocks

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Under certain conditions, rocks of the upper mantle and lower crust melt, forming a hot liquid beneath the surface called:

A. Lava
B. Magma

The main products of eruption are:

A. Lava
B. Gases
C. Solid materials
D. Fossils

Typical components of a volcano include:

A. Volcanic cone
B. Crater
Caldera
D. Vent
E. Magma chamber

The most common optical properties we discussed in the class include:

A. color
B. streak
C. hardness
D. fracture
E. luster
F. transparency