Exam 22: Minerals, rocks, and Volcanoes

What is the hardness of talc on the Mohs scale?

Orthoclase and plagioclase are the two main types of

Volcanoes that explode violently tend to have magmas of

When a mineral's surface reflects light in a manner similar to a smooth metal,the mineral is said to have a(n)______________ luster.

The most violent volcanic eruption in recorded history was that of

Magma viscosity depends on the ______________ content and the temperature of the magma.

Which of the following is not a volcano or the result thereof?

Dripstone formations that form on cavern ceilings are called _____________.

What is the hardness of diamond on the Mohs scale?

Rocks that formed from the cooling of molten material are classified as

Stalactites are

Which igneous rock has light color (high silica content)and large grains (coarse texture)?

The scientist ______________ is generally regarded as "the father of geology."

Volcanoes are formed by the eruptions of both lava and pyroclastics form steeply sloping,layered cones called ______________.

Which of the following statements is false?

The appearance of a mineral's surface in reflected light is called its ______________.

Dikes are examples of ______________ plutons.

The sedimentary rock known as ______________ consists of rounded pebbles cemented together by silica,calcium carbonate,or iron oxide.

The study of rocks is called

Rocks formed from consolidated sediment deposited in layers are known as _____________ rocks.