Question | Answer |
what is cohesion? | the attraction among molecules that are alike. |
what is adhesion? | the attraction among molecules that are not alike. |
what is polarity? | a condition in which opposite ends of a molecule have slightly opposite charges but the overall charge is neutral. |
true or false? the density of ice is lower than the density of the same volume of liquid water. | true |
true or false? the particles of liquid water are closer together then the particles of the same volume of frozen water. | true |
in which states of matter can water exist in nature on Earth? | solid, liquid, gas |
true or false? the density of fresh water is lowest at 4 degrees celsius. | false 0 degrees celcius is the lowest |
why is water sometimes called the universal solvent? | because so many substances can dissolve in water. |
What is salinity? | A measure of the mass of dissolved solids are in the mass of water |
Identify five of the earths oceans. | Pacific, Atlantic, Arctic, Southern, Indian |
What are the abyss plains? | Large flat areas of fseafloor |
What are mid-ocean ridges? | Sea floor where tectonic plates pull apart. |
What are ocean trenches? | Where tectonics plates collide continental plates |
Describe the surface zone | Shallow water where most sunlight occurs |
Describe the middle zone | Where most light waves occur. (Little faint light) |
Describe the deep zone | No light where most deep sea animals live |
Why are rivers near oceans sometime salty? | Because the salt in the water wants to go to less concentrated places of water so the ocean salt goes to the river water. (Osmosis) |
What is an ocean current? | a large volume of water flowing in a certain direction. |
Fill in the blank. Prevailing winds influence the ___ and ____ of surface currents. | Formation and Direction |
What is an gyre? | Circular systems of currents |
Fill in the blank. Surface currents move water ___ and reach depths of ___ or more. | Horizontally and 400 m |
Identify 5 major gyres. | North Pacific, North Atlantic, South Pacific, South Atlantic, Indian |
How do surface currents affect the weather and climate? | It effects the moisture and density in the air and the temps true around it |
Fill in the blank. ____ in the Pacific and Indian Oceans bring cold water to the ____ where it is ____ by the sun | Wellings, bottom, warmer |
Fill in the blank. Cold, dense water ____ near the poles and travels along the ______ | Sinks, sea floor |
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