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Ocean Study Stack
| Question | Answer |
|---|---|
| what is cohesion? | the attraction of molecules that are alike. |
| what is adhesion? | the attraction of molecules that aren't alike. |
| what states of matter can water exist in nature on earth? | solid liquid & gas |
| what causes water's unique properties? | how dense the water is, liquid is denser then solid, etc. |
| why does ice float in water? | the ice is less dense then the water. |
| list two ways which water is a unique compound. | ice floats in water, substances dissolve in water. |
| how does ice make it possible for living things to live in the lake during winter? | it traps the heat inside the lake like an insulator. |
| what is polarity? | polarity is having two opposites. |
| list the five main oceans. | pacific, Atlantic, Indian, southern, & Arctic |
| how did the water in earth's water become salty? | water washed over the rocks & over some time minerals turned into salt. |
| what is salinity? | salinity is a measure of mass of dissolved solids in a mass of water. |
| what is brackish water? | brackish water is where salt water & fresh water mix. |
| what are ocean trenches? | the deepest part of the ocean |
| what is the four criteria scientists use when classifying ocean zones? | sunlight, temperature, salinity, density |
| what are the three regions of continental margins? | continental shelf, continental slope, & continental rise |
| describe each ocean zone? | surface- shallow, greatest amount of sunlight. middle- wavelength is absorbed. deep- plants don't grow, no sunlight, called the midnight zone. |
| what is an ocean current? | an ocean current is a large volume of water flowing in a certain direction. |
| what is a gyre? | a circular system of currents. |
| what are 5 major gyres? | north atlantic, north pacific, south pacific, south atlantic, & indian ocean |
| how does upwelling occur? | upwelling occurs when wind blows across the ocean's surface & washes water away. |
| what's a benefit of upwelling? | brings nutrient-rich water from deep in the ocean to the ocean’s surface which supports large populations of fish, algae & ocean organisms. |
| describe a density current. & what are they caused by? | moves downward, & moves water deeper into the ocean. it is caused by changes in density. |
| how do surface currents affect weather & climate? | cold water currents release moisture into the air. |
| what are some resources from the seafloor? | energy- oil, natural gas, methane hydrates. minerals- gold, zinc |
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rils5
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