| A | B |
|---|
| current | a strong flow of water, like a river, that moves from place to place. |
| waves | disturbances in the ocean when water moves up and down. |
| estuary | a place where fresh water flowing off the land in rivers and streams mixes iwth salt water from an ocean. |
| tidal pools | ocean water remaining in hollowed-out parts of rocks and low places in the sand in which small plants and animals live. |
| mangrone swamps | an area where trees grow in ocean water. |
| tanker | oil carrying ship. |
| petroleum | another word for oil. |
| polyester | clothing that is made from oil. |
| supertanker | a huge ship that can carry more than 200 million liters of oil across the ocean. |
| double-hulled tanker | a ship that is made of 2 shells of metal and an air space in between. |
| oil | material taken from under the ground or ocean. |
| fuel | a substance that gives off energy when it burns and is used to run engines of vehicles. |
| trench | a very deep place in the ocean. |
