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Temperature also contributes to the manner in which ocean water moves: cold
water is dense and therefore sinks, while warm water rises to the surface.
Temperature is not as great a consideration to marine organisms as it is to their
Despite the presence of grasses, barrier islands have moved significantly over
many thousands of years. During the last Ice Age the level of the sea was 100
yards below what it is today. This water was frozen in the polar ice caps, which
The rear flippers can move forward and backward, contributing to the animals'
ability to move successfully on land. The seal is always "belly down" on land, as
these animals must always "caterpillar crawl" to move. ♢ Name all the differences
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I purchased all three books in this set and taught a short course to a small group of high school kids. We had a great time with this course! We did 10 experiments and held very intense all-day ... Read full review