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Oceanography
6th grade defintion
| Question | Answer |
|---|---|
| The Atlantic Ocean is bordered by which continents | Africa, South America, North America, and Europe |
| continental shelf | slopes down gently from the edge of the continent mostly no deeper than150 meters |
| continental slope | slopes steeply from the continental shelf; it can drop down to 2,000 meters |
| submarine canyon | steep v-shaped canyon that cuts through the continental slope and the shelf |
| abyssal plain | flattest place on Earth |
| seamounts | sharp inactive volcanos |
| guyot | a seamount that waves smash into and create a flat top |
| mid-ocean ridge | longest mountain chain in the world; site of sea floor spreding |
| rift valley | deep valley in the mid-ocean ridge |
| deep-sea trench | subduction occurs here |
| salinity | measure of the amount of dissolved salts in a given amount of liquid |
| sonar | sound navigation and ranging |
| desalination | a prossese of removing salt from ocean floor |
| ocean currents | movement of ocean water that follows a regular patteren |
| surface currents | horizontal movement of ocean water that is caused by wind and that occurs or near the ocean's surface |
| the Coriolis effect | apparent curing of a path of a moving object from an other wise straight path due to the Earth's rotation |
| deep current | a stream like movement of ocean water far below the surface |
| tide | periodic rise and fall of the water level in the oceans and other large bodies of water |
| what does "thermocline" mean | transition between light and darkness |
| where is the thermocline | 300m-700m below sea level |
| what is the end of the surface zone and begin the transition zone | 300m |
| what is the range of temp. in the deep zone | one degrees celsius thought three degrees celsuis |
| the ------ ocean is the largest ocean | Pacific |
| the -------- ocean is the smallest ocean | Artic |
| the ------- ocean is getting larger because -------- | Atlantic; of a divergent boundary ( mid-ocean ridge ) |
| the ------- ocean is getting smaller because ---------- | Pacific; the convergent boundary (subduction) |
| the surface zone has the highest----- level | salinity |
| the deep zone is the most ----- zone | dense |
Created by:
loren0
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