A _____ is an accumulation of sediment that runs parallel to shore and marks the normal limit of sand deposition by wave action. 

Gravity tends to pull Earth and the moon toward each other, but inertia, sometimes called _____, keeps them apart.  

Water from waves washing onto a beach, called the _____, carries particles onshore and increases the beach’s slope. 

Marine erosion is usually most rapid on _____ coasts. 

One of the first persons to classify groups of organisms into natural categories was the 18th-century naturalist _____. 

Any aspect of the physical environment that affects living organisms is called a(n) _____. 

The volume of the ocean’s “container” (the volume of water the ocean can contain) _____. 

Primary producers located at the bottom of the trophic pyramid are eaten by heterotrophs called _____. 

Apart from cyanobacteria, the most productive photosynthetic organisms in plankton are the _____. 

_____ is a group of marine predators that include squids, nautiluses, and octopuses.