ejemplo de examen de comprensión de lectura
the birth of our galaxy
Long before the Sun and the solar system formed, before the galaxy
existed, the universe was filled with gas - mainly hydrogen, with some Párr.1
helium. This gas was eventually to be turned into stars, planets and
people. But before these things could happen, the galaxy had to form.
5 Astronomers believe that the galaxy formed out of a large, fairly
spherical cloud of cold gas, rotating slowly in space. At some point in
time, the cloud began to collapse in on itself, or condense, in the same
way that the clouds which formed individual stars also condensed. Párr.2
Initially, some stars may have formed as the gas cloud began to
10 fragment around the edges, with each fragment condensing further to
form a star or group of stars. Because the cloud was spherical at that
time, we do see some very old stars distributed in a spherical halo
around the outside of the galaxy today. At such early times, these stars
consisted only of the hydrogen and helium gas which made up the
cloud.
The cloud continued to collapse, with more and more stars being
15 formed as it did so. Since the cloud was rotating, the spherical shape
began to flatten out into a disc, and the stars which were formed at this
time filled the disc regions. Once again we see this shape today in the
main body of the galaxy. As the formation of new stars continued, some
of those which had been created earlier had enough time to evolve to Párr.3
20 the end of their active lifetimes, and these stars began to shed their
atmospheres or explode in huge supernova events. In the process,
these older citizens of the still young galaxy enriched the gas in the
cloud with the new, heavier elements which they had formed, and the
new stars being created in the disc regions contained the heavier
elements. Astronomers call these younger, enriched stars population 1
stars, and the older stars population 2.
I. De acuerdo al texto y al párrafo indicado entre paréntesis, escriba V para
verdadero o F para falso en el espacio en blanco.
1.- El sistema solar se formo antes del universo ______
2.-Las estrellas se conforman básicamente de hidrógeno ______
II. Circule la opción correcta.
1.- La palabra “these” en la línea 19 hace referencia a:
a) New stars
b) Young galaxies
c) Old stars
d) Clouds
III. De acuerdo con el texto responda las siguientes preguntas en español.
1.- Explique el proceso de la formación de las estrellas. (Párr. 2)
2.- ¿Qué sucedió en la evolución de las primeras estrellas? (Párr.3)
IV. En español, escriba un resumen del texto en aproximadamente 50
palabras.