LOS CURSOS DE INGLES
GRATIS PREFERIDOS POR LOS HISPANOHABLANTES
THE COLORS OF THE SEA?
and put the verbs in brackets
in the SIMPLE PRESENT.
the human senses, the most obvious patterning of the surface water is indicated
by color. The deep blue water of the open sea far from land is the color of
emptiness and barrenness; the green water of the coastal areas with all its
(be) the color of life.
The sea is blue because the sunlight is reflected back to our eyes from the
water molecules or from very minuscule particles suspended in the sea. In the
journey of the light rays into deep water all the red rays and most of the
yellow rays of the spectrum have been absorbed, so when the light
(return) to our eyes it is chiefly the
cool blue rays we
Where the water is rich in plankton, it
(lose) the glassy transparency that
(permit) this deep penetration of the
light rays. The yellow, brown and green hues of the coastal waters
(be) derived from the minute algae, and
other microorganisms, so abundant there.
on the orca whales
to listen to their sound
Seasonal abundance of certain forms containing reddish or brown pigments may
cause the "red water" known from ancient times in many parts of the
world, and so common
(be) that condition in enclosed waters
(owe) their names to it - the Red Sea and
the Vermilion Sea are examples.
The colors of the sea
(be) only indirect signs of the presence
or absence of conditions needed to support the surface life. Other zones,
invisible to the eye, are the ones that largely
(determine) where marine creatures may