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science ch 12
questions
| Question | Answer |
|---|---|
| why does the ocean have salt? | the minerals wash from the land and the water evaporates leaving the salt behind |
| where is the salt the highest? | Dead Sea because it doesnt rain often and there is less water flowing there than evaporating |
| what changes throughout the ocean as you get deeper? | it gets darker, colder,and water pressure gets stronger |
| what wont collapse in the water pressure at lower level? | submersible |
| what part of the ocean floor gently slopes? | continental shelf |
| what part of the ocean floor is steep and can have deep canyons? | continental slope |
| what is the area that has sediment piled up at the base of the continental slope? | continental rise |
| what is the largest and flattest part of the ocean floor that can have under water mountains? | abyssal plain |
| what will soon happen to the island of Bora-Bora? | it will soon disappear and the coral ring will still be there |
| what is a wave? | the up and down movement of surface water |
| as the wave approaches the shore what happens to the wave? | the bottom of the wave slows down and the top falls foward |
| water moves up and down and energy moves forward -true or false? | true |
| as water becomes shallow does the wave slow down or speed up? | slows down and gets higher and closer together |
| what is it called when a wave falls forward? | a break |
| what is formed from a hurricane? | storm surges |
| where are storm surges highest? | when the continental shelf is nearly flat |
| what causes the biggest wave? | the energy of the earthquake causes a tsunami |
| what are large currents in open ocean called? | surface currents |
| what is an example of a surface current? | gulf stream |
| what type of current carries you out to sea? | rip current |
| what current makes it hard to find your beach towel after you go swimming? | longshore current |
| what type of current carries cold water towards the surface near the coast? | deep-ocean current |
| what effects the tide? | pull of the moon or sun |
| where is the moon during a spring tide? | between sun and earth |
| what is a headland? | hard rock left behind that forms a point of land |
| what often forms after a headland? | waves wear away the rock to form to caves and sea arches |
| what are rivers that flow into the ocean called? | estararies |
| what are 2 problems for people as the sand moves overtime? | it makes the beaches smaller or bigger. it builds in channels which is too shallow for boats to get by |
| what is the process of replacing sand called? | beach restoration |
| what do people do to prevent sand from moving? | they build a jetty, artificial reefs, big machines, subway cars. |
| what has deep sea exploration found? | hydrothermal vents |
| what are 3 things they do to explore the deep sea? | diving bells,suits, and submarines |
Created by:
Emmadean29
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