17-18 Flashcards
All silicate minerals contain which two elements?
silicon, oxygen
An atom’s mass number is 13 and its atomic number is 6. How many neutrons are in its nucleus?
7
As the rate of cooling increases (speeds up), the size of the crystals that form
decreases.
Atoms of the same element, zinc for example, have the same number of ________.
protons in the nucleus
Atoms that have an electrical charge due to a gain or loss of electrons are called ________.
ions
Igneous rock is formed
by crystallization of molten rock.
Magnetic reversals
provide evidence for sea-floor spreading.
Metamorphism may result from
any or all of these
Mount St. Helens is associated with a
convergent (oceanic-continental) boundary.
New oceanic crust forms at
divergent plate boundaries.
Obsidian exhibits this texture.
glassy
Pangaea is
the name of a supercontinent.
Plates move apart leaving a gap at
divergent plate boundaries.
Plates move together along
convergent plate boundaries.
Plates slide past one another at
transform fault boundaries.
San Andreas fault exemplifies this type of plate boundary.
transform fault boundary
Sedimentary rocks
all of these
The African rift valleys are associated with a
divergent boundary.
The Himalaya mountains were produced along a
convergent (continental-continental) boundary.
The Mid-Atlantic ridge is an example of a
divergent boundary.
The common rock produced by the metamorphism of limestone is
marble
The energy that causes plates to move is derived from
Earth’s internal heat.
The formation of the Hawaiian Islands is associated with
no plate boundary of any kind.
The ion at the center of a silicon-oxygen tetrahedron is surrounded by ________.
four oxygen ions
