Earth Sci. Ch. 3

What is the most abundant metal in the Earth's crust?

• silicates

• granite

• coal

• aluminum

Which type of sediment forms when minerals precipitate (crystallize) and separate out of solution?

• mechanical sediment

• chemical sediment

• organic sediment

• sedimentary rocks

Define intrusive rock:

• igneous rocks that forms when magma cools and harden while still underground

• rock that is formed when magma reaches the surface, is extruded out of the earth as lava, then cools and hardens

• any type of igneous rock that is formed when magma cools first slowly and then quickly, giving the rock a mixed texture

• any igneous rock that is formed when magma cools very rapidly and no crystals form

Name the hardest known naturally occurring substance.

• granite

• diamond

• iron

• gold

Which word goes with this definition?

The tendency of a mineral to break readily along certain flat surfaces, producing fragments with the same shape as the parent mineral.

• streak

• luster

• hardness

• cleavage

Name the three general steps of metallurgy:

• concretion, stratum, evaporite

• extraction, refining, shaping

• hydrothermal synthesis, flame-fusion, blast furnace

• metamorphism

Coal is derived from the remains of once-living things.

• True

• False

What are the three main categories of rock?

• precious stone, diamond pipe, precious metal

• porphyritic rocks, amorphous rocks, stratum rocks

• intrusive rocks, extrusive rocks, metamorphism

• igneous rocks, sedimentary rocks, metamorphic rocks

Which is the natural rock consisting of cemented sand grains?

• limestone

• sandstone

• coal seam

• salt dome

Limestone is a chemical sedimentary rock that consists of at least 50% calcium carbonate.

• True

• False