Bowen's Reaction Series

Norman Bowen was a geoscientist from

• Great Britain

• United States

• Canada

• Germany

• The Shire

Minerals that crystallize at higher temperatures tend to be low in

• Iron

• Calcium

• Silicon

• Magnesium

Minerals that crystallize at lower temperatures tend to be low in

• Iron

• Potassium

• Silicon

• Oxygen

The mineral that melts first as rock heats up would be

• Calcium Plagioclase

• Potassium Feldspar

• Sodium Plagioclase

• Biotite

Which of the following would crystallize first as magma cools.

• Pyroxene

• Quartz

• Amphibole

• Sodium Plagioclase

Mafic rocks are composed of mostly

• silicon and calcium

• sodium and magnesium

• potassium and aluminum

• iron and magnesium

The lighter in color the igneous rock, the higher the amount of

• iron

• silica

• calcium

• sodium

Magmas that form at high temperatures and pressures tend to be

• high in viscosity and low in silica

• low in viscosity and high in silica

• high in viscosity and high in silica

• low in viscosity and low in silica

Magmas that form at lower temperatures and pressures tend to be

• High in silica and high in viscosity

• Low in silica and low in viscosity

• High in silica and low in viscosity

• Low in silica and high in viscosity

If a magma has the same composition but cools at a slower rate the result will be

• a rock with different mineral composition

• a rock with smaller grain size

• a rock with larger grain size

• a rock with lighter colors