题目内容

The temperature for the crystalization in the Bowen's Reaction Series changes from high to low, accordingly the color of the crystallized minerals changes from:

A. Dark to light
B. Light to dark

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The earliest minerals that crystallize from the magma of basaltic composition are:

A. Pyroxene
B. Olivine
C. Amphibole
D. Biotite

Factors affecting crystal size in the igneous rocks including:

A. Rate of cooling
B. Amount of silica
C. Amount of dissolved gases

According to the depth from the surface of the Earth to the top point of the intrusive body, the intrusive rocks can be classified into:

A. Plutonic rocks
B. hypabyssal rocks
C. extrusive rocks

According to their periodicity and activity, volcanoes can be classified into：

A. Cinder cones
B. Active Volcano
C. Dormant Volcano
D. Extinct Volcano