Social Science : Geography
HYDROSPHERE
VI. Distinguish the
following
Spring Tide
• When the Sun, Moon and
Earth are aligned in the same line, the collective gravitation pull of the
sun and moon on earth's water strengthens to form a high tide known as spring
tide.
• Such tides always occur on full moon and new moon days.
Neap Tide
• When the Sun and the
Moon are at right angles, their gravitational forces work against each
other, causing a low tide called neap
tide.
• A neap tide occurs between two spring tide i.e, twice a month,
when the first and last quarter moon
appears.
Abyssal Plains
• These are underwater plains found on the deep ocean floor.
• These are usually covered by the thick layer of sediments
composed of clay, silt and sand, brought by the rivers.
• These gradient of the slope is veiy gentle and it appears as a
uniform flat and featureless plain.
Oceanic Deeps
• These are the deepest part of the oceans.
• They are sediment free.
• Most trenches are V-shaped with steep sides.
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