Test 3 Flashcards
(31 cards)
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
