What happens to the period of a wave as it transitions from a deep-water wave to a shallow-water wave?

Which of the following samples would you expect to have the lowest density?

Primary productivity increases off the coast of Peru during La Nina events.

Match each type of sediment to its source, or origin.

What is the underlying cause of coastal upwelling?

The major ions dissolved in seawater have long residence times in the oceans.

Hydrogen bonds are stronger than ionic and covalent bonds. 

The salinity of the oceans has been gradually increasing over geologic time due to the continual inputs of salt from the weathering of rocks on land.

Why have most of the photosynthetic organisms in the ocean evolved to become microscopic phytoplankton? Select all that apply.

Which of the following plankton produce shells made from silica? Select all that apply