BJU Press Earth Science Chapter 10

The Himalayas are probably a zone of regional metamorphism occurring today

What physical law assures us that the amount of material in the earth doesn’t change?

Gabbro and basalt are chemically similar.

A somewhat soft rock with flaky layers or bands of minerals

A coarse texture applies more to the size and shape of the grains in a rock than to how it feels to the touch.

a piece of broken or eroded rock that can range in size from microscopic particles to boulder-sized fragments.

Length of time is not an important agent of metamorphism

Where in the world would you expect to find the results of regional metamorphism?

On the basis of the earth’s design and history, which kind of resource does not seem to be recycled?

A clast is a fragment of rock or other material cemented into a rock.

metamorphic rock containing flattened or flaky mineral crystals, giving it a banded or layered appearance

Halite probably precipitated from very salty seawater.

The main classification difference between siltstone and shale is the way they feel (siltstone is rougher).

how a rock looks and feels based on the sizes of the mineral grains and other particles that compose the rock

The rock cycle is an example of a process God created to reuse natural resources so that we don’t run out.

 sedimentary rock made of nonclastic erosion sediments and formed from chemical precipitation or deposition of fossils

a rock made of sediments produced by erosion or chemical precipitation

Which of the four steps to form sedimentary rocks do NOT apply to a chemical sedimentary rock?

a fine-grained igneous rock with crystals too small to see, even with a microscope

The bands of colors in foliated metamorphic rocks are normally parallel to the sedimentary strata of the source rock.

metamorphism caused mainly by high-temperature magma or lava

An igneous rock has large, distinct mineral crystals embedded in fine crystal grains. What kind of texture does it have?

A dense rock containing distorted fossils

metamorphism that occurred when conditions rapidly changed in rocks

an igneous rock composed of distinct mineral grains that are small and more or less the same size

a coarse-grained igneous rock with very large interlocking crystals, and grains larger than 1 inch across

metamorphism that occurred over large areas widespread, regional tectonic forces, heat, or pressure from weight of rocks

About how old are the oldest sedimentary rocks according to the Young Earth view?

 pieces and particles of mineral crystals, rock fragments, and even fossils in a rock that determine its texture

what are two properties that help classify metamorphic rocks?

Larger igneous mineral crystals mean that the rock cooled more slowly and probably formed deeper in the earth.

an igneous, sedimentary, or another metamorphic rock that seems to have been physically and chemically changed over time

 a solid material in earth’s crust that is a natural combination of minerals or other materials

A rock made almost entirely of fossil shells loosely cemented together

a rock formed from solidified magma or lava

 a rock made from the eroded fragments of other rocks

The classification and identification of rocks is called mineralogy.

a metamorphic rock that doesn't have bands or layers, intends to break into sharp, angular pieces

A key step in classifying a rock is determining how old it is.

any process that causes chemical substances dissolved in water to form a solid compound that settles out of solution

 a rock composed of chemical precipitates, and is one form of nonclastic sedimentary rock

naturalistic, old Earth idea that rock is recycled just like nearly every other natural resource

an igneous rock containing a few large mineral grains embedded in a very fine-textured matrix

A rock containing sharp, broken pieces of other rocks surrounded by cemented sand grains

Color is not a reliable way to classify rocks

A hard rock with large, interlocking mineral crystals.

What kind of igneous rock looks like black broken glass?