| A | B |
|---|
| oceanography | the study of the ocean |
| oceanographers | scientists who study the ocean |
| observe | to look carefully |
| experiment | a test or trial |
| minerals | substances from the earth that are made up of material that was never alive |
| dissolve | to break into tiny pieces and become part of a liquid |
| plankton | the tiny floating plants and animals of the sea |
| algae | one kind of plankton that is made up of tiny green plants |
| food chain | a series of plants and animals, each depending upon the next member in the series for food. |
| green plant | the beginning of every food chain |
| sonar | underwater radar |
| coral reef | an island built by tiny invertebrates |
| sediment | matter that settles to the bottom of a liquid |
