Earth Science Section 6.2 Homework: Igneous Rock: Due Friday, 11/9/12

JavaScript isn't enabled in your browser, so this file can't be opened. Enable and reload.

Read Section 6.2, page 129-134. Answer the questions that follow.

Last Name, First Name *

Period (Do not put rd after the number) *

Intrusive igneous rocks have *

Coarse grained, visible crystals

Fine grained, invisible crystals

no crystals

a glassy texture

Porphyritic textured igneous rocks form *

only deep in the Earth

only at the surface of the Earth

deep in the Earth, followed by an eruption to the surface

at the surface, followed by subduction in to a magma chamber

Which of the following rocks would most likely have gas bubble holes (vesicles) in it? *

Granite

Pumice

Obsidian

Pegmatite

Felsic rocks have *

large amounts of silica in them

small amounts of silica in them

intermediate amounts of silica in them

no silica in them

The rocks basalt and gabbro would be considered *

Felsic

Mafic

Intermediate

Glassy

What are three conditions that can cause rock to melt back in to magma? *

Igneous dikes *

cut across rock layers

run parallel to rock layers

are common in areas of volcanic activity

Both options 1 and 3 are correct

______________________ form the cores of many mountain ranges, such as the Sierra Nevadas in California. *

Laccoliths

Dikes

Batholiths

Sills

What are the most commonly found types of rocks here in La Canada? *

Igneous Extrusive

Sedimentary

Igneous Intrusive

Metamorphic

Dark minerals that have the highest freezing points will crystallize ________________ as magma is cooling. *

first

last

Submit

Clear form

Never submit passwords through Google Forms.

This content is neither created nor endorsed by Google. - Terms of Service - Privacy Policy

Does this form look suspicious? Report

Forms