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oceans
Maria
| Question | Answer |
|---|---|
| What are 3 ways water is a unique compound? | 1.) solid, liquid, and gas 2.) high specific heat 3.) ice less dense then water 4.) water forms drops 5.) some substances dissolve in it . |
| the _________ oxygen atoms attracts ________ hydrogen atoms of other water molecules. | negative;positive |
| Define cohesion. | the attraction between molecules that are alike. |
| Define adhesion. | the attraction between molecules that are not alike. |
| True or false: the particles in liquid water are closer then the particles of the same volume of frozen water. | True because the water particles are more dense. |
| How does ice make it possible for organisms to live in the lake at wintertime? | Ice is a insulator. This would keep the water beneath farther from the cold making it warmer. Therefore, it traps heat. |
| True or False: The density of ice is lower then the density of the same amount of liquid water. | True |
| What states of matter can water exist on earth? | Solid, liquid, gas. |
| What are the 5 oceans on earth? | 1.) pacific 2.) Indian 3.) Atlantic 4.) arctic 5.) southern |
| What are 2 sources of water for earth's oceans? | Condensation and comets. |
| What are 4 features of the ocean's floor? describe each. | 1.) Continental margins- ocean basin next to a continent. (shelf, slope, and rise 2.) Abyssal plains- large, flat plains on sea floor. 3.) Mid-ocean ridge- volcano mountains form 4.) Ocean trenches- ocean plates collide with continental plates. |
| What are the 4 criteria used when classifying oceans? | Sunlight, salinity, density, and temperature. |
| what are the 3 ocean zones? describe each. | 1.) surface zone- most sunlight; organisms live here; shallow. 2.) middle zone- receive faint blue-green light; 200 and 1000 meters 3.) deep zone- no light; no plants; 1000 meters and down |
| why is river water near an ocean sometimes salty? | because there is salt in the ocean so the river that is close could mix with some of the ocean water causing it to be salty. |
| how does the ocean become salty? | erosion with rocks that have salt on them. |
| define salinity. | the measure of salt in a mass of water. |
| define seawater and brackish water. | seawater- water from an ocean with a salinity of at least 35 ppt brackish water- fresh water mixed with some seawater; 1-17 ppt |
| what causes waters unique properties? | polarity |
| define polarity. | when one end of a particle is slightly positive and one is slightly negative. |
| why is water sometimes called the universal solvent? | most things can dissolve in it. |
| what causes ocean currents? | unequal heating of the earth. |
| what are oil, natural gases, and methane hydrates examples of? | energy resources. |
| Manganese, gold and zinc are all examples of what? | Minerals. |
| water particles are made up of what? | 1 oxygen (negative) and 2 hydrogens (positive) |
| Define ocean current. | a large volume of water flowing in a certain direction. |
| what influences the formation and direction of ocean currents? | prevailing winds |
| the North Pacific, South Pacific, North Atlantic, South Atlantic, and Indian ocean are all part of what system? | the circular system of currents |
| why does upwelling occur and what is one benefit from this? | wind blows across oceans surface and pushes water from an area. this helps to support a large population of ocean organisms. |
| what directions do the currents turn in each hemisphere? | North-right South-left |
| which current moves water horizontally? which move the water vertically? | horizontal- surface currents vertical- density and upwelling currents. |
| How do ocean currents affect the weather and climate? | warm ocean currents bring moist and heat and cold ocean currents bring less moisture and heat making it colder and dryer. |
| explain the process in which the Great Ocean Conveyor Belt moves water. | 1.) cold, dense water near the poles sinks and travels along seafloor 2.) upwellings in the pacific and Indian oceans bring the cold water to the surface 3.) warm surface water moves towards the poles and the process repeats. |
Created by:
mariagivens
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