1. No category

Nombre
Clase
Fecha
Hoja de destrezas
Repaso de la sección
El ciclo de las rocas
USAR TÉRMINOS CLAVE
1. Escribe tu propia definición de los términos ciclo de las rocas, meteorización, erosión
y deposición.
COMPRENDER LAS IDEAS PRINCIPALES
2. Explica cómo el ciclo de las rocas transforma un tipo de roca en todos los demás
tipos de roca.
3. ¿Cuánto suelen durar los procesos del ciclo de las rocas que transforman las rocas?
4. ¿Qué procesos afectan a las rocas de la superficie de la Tierra?
5. Explica cómo el calor y la presión pueden modificar la roca de la corteza terrestre.
6. Explica de qué manera la roca enterrada sube a la superficie de la Tierra.
Copyright © by Holt, Rinehart and Winston. All rights reserved.
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Rocas
Nombre
Clase
Fecha
Repaso de la sección (continuación)
RAZONAMIENTO CRÍTICO
7. Analizar relaciones ¿Qué procesos geológicos del ciclo de las rocas transformarían
una roca sedimentaria en otra roca sedimentaria, una roca metamórfica en otra roca
metamórfica y una roca ígnea en otra roca ígnea?
FCAT PREPARACIÓN
______ 8. Los mismos procesos geológicos que cambian a las rocas durante el ciclo de
las rocas le dan forma a la superficie de nuestro planeta. Algunos de estos
procesos tienen lugar en la superficie, mientras que otros se producen en
las profundidades de la Tierra. El siguiente ejemplo describe un proceso
geológico que ocurre en la superficie terrestre. Después de un período de
fuertes lluvias, una parte de la ladera de una montaña se desprende y se
desliza cuesta abajo. ¿Cómo se llama el proceso por el que la gravedad
transporta en forma descendente parte de la ladera de una montaña?
A. deposición
B. levantamiento
C. erosión
D. meteorización
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Rocas
ANSWER KEY
4. Igneous rocks form when magma
5.
6.
7.
8.
9.
10.
2. Sample answer: All rocks can be
cools. Metamorphic rocks form when
temperature and pressure change one
type of rock into another. Sedimentary
rocks form when rock or mineral fragments are cemented together, when
chemicals crystallize out of solution,
or when the remains of organisms
change into rock.
Intrusive igneous rocks form when
magma cools within Earth. Extrusive
igneous rocks form when magma
cools on Earth’s surface.
Magma that cools rapidly forms finegrained igneous rocks that have small
crystals. Magma that cools slowly
forms coarse-grained igneous rocks
that have large crystals.
Foliated metamorphic rocks have
bands or layers of different minerals.
Nonfoliated metamorphic rocks do not
have bands.
Clastic sedimentary rocks are made of
cemented grains of other rocks.
Chemical sedimentary rocks form when
a chemical crystallizes out of a solution.
Organic sedimentary rocks form when
the remains of organisms become rock.
Composition refers to the chemical
makeup of a rock. Texture is the size,
shape, and position of the grains in the
rock. Two rocks can be made of the
same chemicals, but have different
textures. Likewise, two rocks can have
similar textures and very different
chemical compositions.
C
3.
4.
5.
6.
7.
8.
uplifted, weathered, and eroded. The
sediment is then buried, squeezed, and
cemented to form sedimentary rock.
All rocks can be further heated and
squeezed to form metamorphic rock.
All rocks can be melted to form magma
that cools to form igneous rock.
The processes of the rock cycle generally take millions of years.
When rocks are at Earth’s surface, they
can be weathered, eroded, and deposited.
Pressure can squeeze sediments
together to form sedimentary rock.
Heat can melt rock to form magma,
which cools and becomes igneous
rock. Pressure and heat can change
one metamorphic rock into another
metamorphic rock.
Buried rock is brought to the surface by
uplift, a process in which parts of Earth
are raised to relatively higher elevations.
A sedimentary rock at Earth’s surface
would change into another sedimentary rock if it were weathered and
eroded and the deposited sediments
were buried and cemented. A metamorphic rock buried deep within
Earth would change into another
metamorphic rock if it were placed
under increased heat and pressure. An
igneous rock buried within Earth
could change into another igneous
rock if it were melted to form magma.
C
SECTION: GEOLOGY OF FLORIDA
1. A platform is a geologic structure
SECTION: THE ROCK CYCLE
made of flat-lying layers of sedimentary rock.
2. Similar types of rock are found
beneath Florida and northwest Africa.
3. The limestone is a product of the life,
death, and burial of marine organisms.
The white quartz sand is the result of
the erosion and deposition of sediments from the Appalachian
Mountains. Changes in sea level
caused a reshaping of sediments that
covered the Florida Platform.
1. Sample answer: The rock cycle is the
cycle in which rocks are changed continuously over long periods of time into
new rocks by heat, pressure, weathering, and erosion. Weathering is the
process in which rock is broken down
into sediments by water, wind, ice,
heat, or living organisms. Erosion is the
removal of sediments from their original location. Deposition occurs when
sediments that were removed by erosion are left in low-lying areas.
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Holt Science and Technology
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Rocks