Test 3 Flashcards
The layer of solid rock below the soil is
bedrock
Substances that are found naturally in the earth and have a crystalline structure are
minerals
Chemical sediments that result from the evaporation of water are
evaporites
A soil substance composed of decayed organisms’ particles is
humus
Rocks that have a smooth, glasslike texture are
amorphous
The metal that is more valuable than gold or silver is
platinum
The measure of the pull of gravity on an object is
weight
A volcano that will probably not erupt again is called
dormant
The largest group of minerals, which compose over 90% of the earth’s crust, are the
silicates
The rarest, most durable, and most beautiful minerals are
precious stones
A theory that has never been proven false is a
law
A well-known chemical sedimentary rock is
limestone
The most famous measure of earthquake strength, which rates earthquakes on a scale of 1-10, is the
Richter magnitude scale
Which earthquake zone includes the San Andreas Fault
circum-Pacific belt
Hard, round structures that form when minerals settle out of water and crystallize around a sand grain or other mineral fragments are called
concretions
The group on which a test is performed is called the
experimental group
Beryl that has a deep green color is
emerald
The inner core of the earth is thought to be
solid
Brass is an alloy of _____________ and zinc
copper
Crystals are generally characterized by many flat surfaces called
faces
About 80% of the world’s earthquakes occur in
the circum-Pacific belt
Any piece of solid volcanic ejecta is a
pyroclast
The breakdown of organisms is known as
decomposition
The third step in the scientific method is
formulate a hypothesis
A metal mixture of iron and carbon is
steel
Mining that uses a rotating drum that travels down a long track while grinding while grinding coal is called _________ mining
longwall
The most basic unit of matter is the
atom
Type of rock formed when deposits of sand and mineral fragments are cemented together
sedimentary rock
Any mineral that contains a valuable metallic element
ore
Type of rock formed when magma solidifies
igneous rock
A substance with a pH of 10 would be
basic
