Question | Answer |
Animal-like plankton are called __________. | zooplankton |
In ocean water, oxygen, carbon dioxide, and nitrogen are present as ______________. | gases |
The fresh water in rivers is less ___________ than ocean water. | dense |
In ocean water, sodium chloride, potassium chloride, and magnesium chloride are present as dissolved _____________. | salts |
What is a self-contained underwater breathing apparatus called? | scuba |
The plants and animals that live on the ocean floor and do not swim are called ____________. | benthos |
Water temperature _____________ as ocean depth increases. | decreases |
The organisms that live on or near the ocean's surfaace and drift with currents are called ________________. | plankton |
What keeps water in the deepest regions of the ocean from freezing? | pressure |
The total amount of dissolved salts in ocean water is called _____________. | salinity |
Plantlike plankton are called ____________. | phytoplankton |
Sand particles, bits of shells, and decaying organisms that do not dissolve in ocean water form _____________. | sediment |
The total amount of dissolved salts in ocean water is called _________________. | salinity |
Ocean water is a mixture of water and ______________. | salts |
Because phytoplankton need sunlight for ___________________, they must live near the surface of the ocean. | photosynthesis |