9781422276730

WORDS TO UNDERSTAND:

An animal that gets its food by filtering tiny animal and plant particles from water it takes in, usually through its mouth. A scientist who studies all parts of the ocean, from how the water behaves to sea life and volcanoes. Tiny sea animals that float with the current and provide an essential food source to many sea creatures. A long, narrow ditch, which is often the deepest part of the ocean.

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