Difference between revisions of "AY Honors/Sand/Answer Key/es"

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<!-- 2. ¿Qué significa el término «arena»? Nombrar dos tipos de arena. -->
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Sand is a naturally occurring granular material composed of finely divided rock and mineral particles. As the term is used by geologists, sand particles range in diameter from 0.0625 (or 1⁄16 mm) to 2 millimeters. An individual particle in this range size is termed a sand grain.
 
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Sand is formed through two primary processes - Physical and Chemical.
 
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Sand is composed of inorganic material, even if it had biogenic origins (shells, coral, diatoms, foraminfera). Soil, however, is made up of sand, silt, clay, and organic humus (broken down plant and animal matter).
 
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<!-- 5. ¿Qué se entiende por forma, superficie, fractura de grano y tamaño de grano? -->
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===Shape===
 
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The shape of a grain of sand can tell us about its history. Rounded grains are those which are relatively old, the rounding being caused by the grain getting blown around by wind or pushed around by water. Grains with more angular surface are relatively young, not having had time to get rounded by the forces of nature.
 
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Glass sand is sand with low iron content, and high silica (SiO<sub>2</sub>) content. This type of sand is ideal for glass making.
 
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Molding sand, foundry sand, or green sand is sand that when moistened or oiled tends to pack well and hold its shape. It is used in the process of sand casting.
 
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Sand can be used as an abrasive material for polishing materials. Several different grain sizes, gradually growing smaller, are used to polish surfaces.
 
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Building sand is used for making concrete. Sharp sands (with angular surfaces) are preferred.
 
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Sand can be used to filter water or other liquids. A media filter is a type of filter utilizing a bed of sand, crushed granite or other material to filter water for drinking, swimming pools, aquaculture, irrigation, stormwater management and other applications.
 
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Furnace sand is used for lining the floor of industrial furnaces which are used for processing molten metals (such as steel).
 
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Sand created by the wave action of a lake. A prime example would be the Indiana Dunes National Lakeshore in northwest Indiana. Depending on its mineral origin, lake shore sand is often used for foundry work.
 
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<!-- 7. Examinar cinco clases de especímenes de arena bajo magnificación y observar sus diferentes características. -->
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<!-- 7. Examine five types of sand specimens under magnification and observe their vari­ous characteristics. -->
 
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Using a hand lens or a microscope, examine the sand grains, looking for the features described in requirement 5 (shape, surface, grain fracture, and grain size). You can also note its color and its variability are all the grains the same size? Are they all the same shape, or are there big differences from one grain to the next?
 
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1. Port Melbourne, Australia. Primarily mineral origin.
 
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2. Bar Harbor, Maine. A mixed mineral and biogenic sand.
 
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3. Sea Point, Capetown, Southafrica. Primarily biogenic.
 
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4. Mona Island, Puerto Rico. A biogenic sand.
 
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5. Soesogakk, Jeju, South Korea. Volcanic origin.
 
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6. Mustang Island, Texas. An example of very fine sand.
 
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7. Lake Champlain, Vermont. An example of a very coarse sand.
 
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8. Columbia River, Oregon. An example of riverine sand.
 
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| version = NIV
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| version = RVR1995
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| book = Genesis
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| book = Génesis
 
| chapter = 22
 
| chapter = 22
 
| verse = 17
 
| verse = 17
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| text = I will surely bless you and make your descendants as numerous as the stars in the sky and as the sand on the seashore. Your descendants will take possession of the cities of their enemies
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| text = de cierto te bendeciré y multiplicaré tu descendencia como las estrellas del cielo y como la arena que está a la orilla del mar; tu descendencia se adueñará de las puertas de sus enemigos.
 
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| version = NIV
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| version = RVR1995
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| book = Proverbs
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| book = Proverbios
 
| chapter = 27
 
| chapter = 27
 
| verse = 3
 
| verse = 3
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| text =
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| text = <br />
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<br>
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:Pesada es la piedra y la arena pesa,
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:Stone is heavy and sand a burden,
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:pero más pesada que ambas es la ira del necio.
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:but provocation by a fool is heavier than both.
 
 
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| version = NIV
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| book = Psalm
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| book = Salmo
 
| chapter = 139
 
| chapter = 139
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| verse = 17, 18
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| verse = 17 y 18
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| text =
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| text = <br />
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<br>
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:¡Cuán preciosos, Dios, me son tus pensamientos!
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:How precious to me are your thoughts, O God!
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::¡Cuán grande es la suma de ellos!<br /><br />
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::How vast is the sum of them!<br><br>
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:Si los enumero, se multiplican más que la arena.
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:Were I to count them,
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::Yo despierto y aún estoy contigo.
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::they would outnumber the grains of sand.
 
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::When I awake,
 
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::I am still with you.
 
 
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==Referencias==
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==References==
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* [[w:Rock microstructure|Rock microstructure]]
 
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[[Category:Adventist Youth Honors Answer Book|{{SUBPAGENAME}}]]
 
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Latest revision as of 21:41, 14 July 2022

Other languages:
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Arena

Nivel de destreza

1

Año

1956

Version

17.05.2024

Autoridad de aprobación

Asociación General

Sand AY Honor.png
Arena
Estudio de la naturaleza
Nivel de destreza
123
Autoridad de aprobación
Asociación General
Año de introducción
1956
Vea también
Maestría de Conservación


1

Hacer una colección de 30 arenas de diferentes colores. Correctamente etiquetadas con el nombre y cada localidad donde fueron encontradas.



2

¿Qué significa el término «arena»? Nombrar dos tipos de arena.



3

Dar el origen de la arena y qué minerales contiene.



4

¿Cuál es la diferencia entre la arena y el suelo?



5

¿Qué se entiende por forma, superficie, fractura de grano y tamaño de grano?



6

Definir los siguientes y dar el uso de cada uno:


6a

Glacial



6b

Calcáreos



6c

Arenas movedizas



6d

Arenas de vidrio



6e

Arenas de moldeo



6f

Arenas de pulir



6g

Arenas para construir



6h

Arenas de filtro



6i

Arenas de horno



6j

Arenas de la orilla del lago




7

Examinar cinco clases de especímenes de arena bajo magnificación y observar sus diferentes características.


  • 1

  • 2

  • 3

  • 4

  • 5

  • 6

  • 7

  • 8


8

Memorizar y discutir Génesis 22:17, Proverbios 27:3, y Salmo 139:17 y 18.




de cierto te bendeciré y multiplicaré tu descendencia como las estrellas del cielo y como la arena que está a la orilla del mar; tu descendencia se adueñará de las puertas de sus enemigos.
-- Génesis 22:17 (RVR1995)




Pesada es la piedra y la arena pesa,
pero más pesada que ambas es la ira del necio.
-- Proverbios 27:3 (RVR1995)




¡Cuán preciosos, Dios, me son tus pensamientos!
¡Cuán grande es la suma de ellos!

Si los enumero, se multiplican más que la arena.
Yo despierto y aún estoy contigo.
-- Salmo 139:17 y 18 (RVR1995)



Referencias

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