lexigav1 lexigav1

10-01-2017
Biology

contestada

Why are some beaches made of sand and some made of pebbles?

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asflnwa asflnwa

10-01-2017

because the waves tend to bring in sand from the bottom of the ocean. The ocean is always shifting (High tide and low tide). Therefore, some pull in pebbles and some pull in sand from the bottom of the ocean.

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