PYQ 3 — [2022 / Set-1]
something we complain about when it gets in our food, and praise
we would discover an account of a geological past and a history of
marine life that goes back thousands and, in some cases, millions of
years.
3
Sand covers not just sea-shores, but also ocean beds, deserts and
mountains. It is one of the most common substances on Earth. And it
is a major element in man-made items too
concrete is largely sand,
while glass is made of little else.
4
What exactly is sand ? Well, it is larger than fine dust and smaller
than shingle. Depending on its age and origin, a particular sand can
consist of tiny pebbles or porous granules. Its grain may have the
shape of stars or spirals, their edges jagged or smooth. They have
come from the erosion of rocks, or from the skeletons of marine
organisms which accumulate on the bottom of the oceans, or even
from volcanic eruptions.
5
grains may be derived from nearby coral outcrops, from crystalline
quartz rocks or from gypsum. On Pacific islands jet black sands form
from volcanic minerals.
6
Usually, the older the granules, the finer they are and the smoother
the edges. The fine, white beaches, for instance, are recycled from
sandstone several
Practice task: Write a complete board-style answer. Self-check format + cue coverage + word limit.