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ocean review
composition/currents/properties of water
| Question | Answer |
|---|---|
| there are how many gyre's? | 5 |
| what is deep circulation? | it stirs a deep lower layer of the sea |
| how do icebergs form? | a piece of ice from a glacier falls to the ocean, the ice gets bigger and the water gets colder, which creates an iceberg |
| what is surface circulation? | it stirs a thin upper layer of the sea |
| where are the gyre's? | 2 in the Pacific ocean, 2 in the Atlantic ocean, and 1 in the Indian ocean |
| where did they find the titanic? | the Labrador near Greenland |
| how do icebergs float? | as the ice freezes it leaves the salt behind, therefore the water getting saltier and colder, which is denser than pure ice |
| what is water displacement? | the area of an object takes up in water |
| why are the oceans salty? | rain that fell to earth"s surface a billion years ago washed over rocks and minerals containing sodium, chlorine, and other substances that form salts |
| what is brackish water? | fresh water mixed with seawater |
| what are abyssal plains? | large flat areas of seafloor that extend across the deepest part of the ocean basins |
| what is salinity? | water from the sea or ocean that has an average salinity of 35 ppt. |
| what is the deepest ocean of the 5? | the pacific ocean |
| what are the 3 regions in the continental margins? | continental shelf, continental slope, and continental rise |
| what are the 4 criteria scientist use when classifying ocean zones? | 1) amount of sunlight 2) density 3) temperature 4) salinity |
| what are 2 sources of water for earth's ocean | volcanoes added water vapor to the atmosphere. icy comets and asteroids hit earth, when they melted the water was added to the ocean. |
| how many positive and negative charges are in a water molecule | 1 positive, and 2 negative charges |
| what is cohesion? | the attraction among molecules that are alike |
| what is adhesion? | the attraction of molecules that are different |
| what is polarity? | a condition in which opposite ends of a molecule have slightly opposite charges, but the overall charge of the molecule is neutral |
| what makes water a unique compound? | water has 3 forms: solid, liquid, and a gas. water has a high specific heat, and it forms drops when spilled. |
| what happens to molecules when water freezes? | the molecules get closer to each other, and they increase in amount |
| which property of water is most responsible for an insect being able to walk on the surface of a pond? | cohesion |
| what is the highest density? | water that is at 4 degrees celcius |
Created by:
wendy_ortega
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