Ch. 4- Section 2: Quiz Review

Which of the following describes how igneous rocks form?

• Changes in temperature and pressure or the presence of hot, watery fluids.

• When sediments are pressed and cemented together.

• When molten rock (magma or lava) cools and hardens.

• When minerals form from solutions.

______ igneous rocks form as lava cools on Earth's surface.

• molten

• extrusive

• intrusive

• andesitive

______ igneous rocks form as magma cools below the Earth's surface.

• molten

• extrusive

• intrusive

• andesitive

Which type of igneous rocks are dense, dark-colored rocks?

• granitic

• basaltic

• andesitic

Which type of igneous rocks are light-colored rocks of lower density than basaltic, containing lots of silica but little iron and magnesium?

T/F: One way to classify igneous rocks is by the type of magma they form from: basaltic, granitic, & andesitic.

• true; but there are other means in which they are classified

• false; its by the type of soil they are found in

Which of the following is not an example of volcanic glass?

• pumice

• granite

• obsidian

• scoria

Which type of igneous rocks have a mineral composition that is in the middle of the three types; the volcanoes it comes from can erupt violently.

• basaltic

• granitic

• andesitic

Pumice and Scoria have a specific look due to what being trapped in them? It causes holes to be left behind in the rock after it leaves.

Which of the following is a reason that volcanic glass has its specific properties/appearance? Select any that apply.

• no mineral grains form from rapid cooling

• gasses are trapped and the rocks form around it

• most of the atoms aren't arranged in an orderly pattern

• few crystals are present

Tags

NGSS.MS-PS1-2