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morales5853

Why is the ocean salty, but rivers flowing into it are not? - 1 views

oceanservice.noaa.gov/...riversnotsalty.html

Ocean Rivers Salty

shared by morales5853 on 03 Dec 14 - No Cached
  • In the beginning, the primeval seas were probably only slightly salty. But over time, as rain fell to the Earth and ran over the land, breaking up rocks and transporting their minerals to the ocean, the ocean has become saltier.
  • Rain replenishes freshwater in rivers and streams, so they don’t taste salty. However, the water in the ocean collects all of the salt and minerals from all of the rivers that flow into i
  • It is estimated that the rivers and streams flowing from the United States alone discharge 225 million tons of dissolved solids and 513 million tons of suspended sediment annually to the ocean. Throughout the world, rivers carry an estimated four billion tons of dissolved salts to the ocean annually.
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  • About the same tonnage of salt from ocean water probably is deposited as sediment on the ocean bottom and thus, yearly gains may offset yearly losses. In other words, the ocean today probably has a balanced salt input and output (and so the ocean is no longer getting saltier).
    • marino5856
      marino5856 on 03 Dec 14
       
      the sea is salty because it brings the earth materials and it becomes salty. The rivers are not salty because when it rains it takes away everything and the earth matirals don't go to the rivers.
marino5856

Why aren't lakes salty like the ocean? - 0 views

www.whyzz.com/ent-lakes-salty-like-the-ocean

Salty ocean

shared by marino5856 on 04 Dec 14 - No Cached
  • The ocean is salty for several reasons, one of which is the groundwater from rain which trickles down into the ocean and picks up salt from the earth along its way! But this same water trickles down into lakes… so why aren't lakes salty?
  • The reason lake water usually isn't salty (or at least it's less salty than ocean water) is because the salty groundwater not only runs into the lakes, but also back out of it! Unlike the huge, vast ocean which already covers most of the Earth and therefore can't open up to any larger body of water, most lakes have outlets from which water leaves. This means that the salty groundwater has a chance to filter out and escape! (In the ocean, it has nowhere e
  • lse to go!)
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    • marino5856
      marino5856 on 04 Dec 14
       
      one of the reasons why lakes are not salty is because the salty groundwater it not usually runs in rivers and lake, if not also comes back out of it. But the  Vast ocean already cover most of the earth materials. Most lakes have outlet which water leaves. The salty water can get out of the oceans 
Regina Cantu

Why is the ocean salty? - 1 views

www.whyzz.com/why-is-the-ocean-salty

Seawater salty

shared by Regina Cantu on 03 Dec 14 - No Cached
  • The ocean is also salty from rainwater that falls onto rocks or land, picks up some salt in the earth, and then trickles down into the ocean! There are also some places in the ocean floor where salty gases and minerals from within the Earth get released into the ocean!  
Regina Cantu

Why are Oceans Salty? - EnchantedLearning.com - 0 views

www.enchantedlearning.com/...Salty.shtml

Seawater salty

shared by Regina Cantu on 03 Dec 14 - Cached
  • As water flows in rivers, it picks up small amounts of mineral salts from the rocks and soil of the river beds.
  • but the salt remains dissolved in the ocean - it does not evaporate. So the remaining water gets saltier and saltier as time passes.
  • This very-slightly salty water flows into the oceans and seas. The water in the oceans only leaves by evaporating (and the freezing of polar ice),
Nany Rocha

Henry Hudson - Facts & Summary - HISTORY.com - 0 views

www.history.com/...henry-hudson

henry hudson history

shared by Nany Rocha on 24 Nov 14 - No Cached
  • wice being turned back by ice, Hudson embarked on a third voyage–this time on behalf of the Dutch East India Company–in 1609. This time, he chose to continue east by a more southern route, drawn by reports of a possible channel across the North American continent to the Pacific. After navigating the Atlantic coast, Hudson’s ships sailed up a great river (which would later bear his name) but turned back when they determined it was not the channel they sought. On a fourth and final voyage, undertaken for England in 1610-11, Hudson spent months drifting through the vast Hudson Bay and eventually fell victim to a mutiny by his crew. Hudson’s discoveries laid the groundwork for Dutch colonization of the Hudson River region, as well as English land claims in Canada.
  • enry Hudson made his first voyage west from England in 1607, when he was hired to find a shorter route to Asia from Europe through the Arctic Ocean. After
  • tic Ocean. After
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  • s hired to find a shorter route to Asia from
  • n Bay and eventually fell victim to a mutiny by his crew. Hudson’s discoveries laid the groundwork for Dutch colonization of the Hudson River region, as well as Englis
  • ken for England in 1610-11, Hudson spent months drifting through the vast Hudson Bay and eventually fell victim to a mutiny by his crew. Hudson’s discoveries laid the groundwork for Dutch colonization of the Hudson River region, as w
marino5856

Why is the sea salty and rivers and lakes aren't? - The Boston Globe - 1 views

www.boston.com/...lty_and_rivers_and_lakes_arent

shared by marino5856 on 03 Dec 14 - No Cached
    • marino5856
      marino5856 on 03 Dec 14
       
      the water of the world ist goes in a contninouse cycle first evaporated and then it rain.
  • Water falls all over the planet, but when it passes through soil and rocks it slowly dissolves bits of minerals, including sodium chloride (salt). This means rivers and lakes have tiny fragments of salt in them, which — little by little — are carried into the sea.
    • marino5856
      marino5856 on 03 Dec 14
       
      the rain falls to the grownd between rocks and pants. that rain becomes into river and the earth becomes salty. Like there are vocanos under water the volcanos have minerals and the sea keeps them.
  • Rivers and lakes are replenished with fresh rainwater, but oceans are a sort of dumping ground where water with accumulated salt keeps adding to the salinity. There are also vents and volcanoes under the ocean that increase the amount of minerals, especially salt.
lopez5891

Dolphin - Wikipedia, the free encyclopedia - 0 views

en.wikipedia.org/Dolphin

Animals related to Dolphins

shared by lopez5891 on 03 Nov 14 - Cached
  • Dolphins are cetacean mammals closely related to whales and porpoises. There are almost forty species of dolphin in 17 genera. They vary in size from 1.2 m (4 ft) and 40 kg (90 lb) (Maui's dolphin), up to 9.5 m (30 ft) and 10 tonnes (9.8 long tons; 11 short tons) (the orca or killer whale). They are found worldwide, mostly in the shallower seas of the continental shelves and are carnivores, eating mostly fish and squid. The family Delphinidae, the largest in the order Cetacea, evolved relatively recently, about ten million years ago during the Miocene.
Regina Cantu

Bartolomeu Dias - Biography - Explorer - Biography.com - 0 views

www.biography.com/...bartolomeu-dias-9273850

Bartholomew Dias Info

shared by Regina Cantu on 24 Nov 14 - No Cached
  • Bartolomeu Dias Biography Explorer (c. 1450–1500)
  • Bartolomeu Dias led the first European expedition round the Cape of Good Hope in 1488.
  • Bartolomeu Dias was sent by Portuguese King John II to explore the coast of Africa and find a way to the Indian Ocean.
  • Regina Cantu on 24 Nov 14
     
    Bartholomew Dias info.
deleon6878

The Earth Life Web, the Fish Eye and Sight in Fish - 0 views

www.earthlife.net/sight.html

shared by deleon6878 on 14 Nov 14 - No Cached
  • For sharks and Rays this is not a problem as they do not have color vision anyway. The eyes of shallow water species are adapted to have a maximum sensitivity to light of around 500 nanometres, and the eyes of those species that live in deeper waters are adapted to 475-480 nanometres. Most Teleost fish however have color vision, and the eyes of the Trout (Onkorhynchus mykiss) have three sensitivity peaks at, 455, 530 and 625 nanometres.
    • deleon6878
      deleon6878 on 14 Nov 14
       
      Sharks and Rays are color blind so they don't care about how deep they go cause the deeper you go the less color you see, the fish,sharks,rays,etc that live deeper in the ocean they used to 475-480 nanometers 
    • deleon6878
      deleon6878 on 14 Nov 14
       
      However teleost fish have color vision and the trout have three sensitivity limits at, 455, 530 and 625nanometers so they can see the colors in the water if they go deeper they would not see anything 
garza6544

How are rainbows made? - 0 views

faculty.cord.edu/...genamahlen.html

sky Info

shared by garza6544 on 03 Dec 14 - No Cached
  • The birth of each rainbow begins with millions of tiny rain droplets.  The rain droplets serve as a type of reflector of light.  White light enters one individual rain droplet and exits as one specific color of the spectrum.  Without millions of rain droplets, a rainbow would not occur.  If you only had a few rain droplets you would only see a few colors.  This is typically why rainbow appear after a rain storm
  • Each rain droplet has a function in the formation of the rainbow. Sunlight enters the rain droplet at a specific angle and the rain droplet separates the white light into many different colors.  This angle is a fixed measurement between your eye
  • and the sun.  What color is refracted depends upon the critical angle,                   which is the angle the sunlight strikes the back of the rain droplet.  Red light bends the least, exiting the rain droplet at a 42 degree angle, while Violet light bends the most, exiting the rain droplet at a 40 degree angle.  All of the other colors of the rainbow exit the rain droplets at some angle between 40 and 42 degrees, thus making up the colors of the rainbow ROYGBIV, this order never changes.
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  • Each rain droplet reflects all colors at a given point and time, but only one color comes back to your eye, requiring million of rain droplets to create a rainbow.  As the rain droplets fall through the sky, the colors of the spectrum being reflected and refracted are constantly changing.
  • The perfect time and place to look for a rainbow you need bright sunlight to your back and rain clouds off in the distance in the direction of your shadow. If it is later than 4:30 in the afternoon or earlier than 8:30 in the morning at these condition there is a very good chance you will be able to see a rainbow in the sky.  Other places you may see rainbows formed are fountains, in the ocean as the waves crash against the rock which create a mist in the air, waterfalls, sprinklers and mist from a garden hose. Always remember to have the sun at your back to see a rainbow, happy rainbow hunting!!!!!!
  • Rainbows form a complete circle, however only half is visible.  The horizon only  Picture from the web site of the Department of Physics and Astronomy, Arizona State University                                                             allows us to see half of the rainbow circle, so we see just an arc.  What causes the rainbow to have a circular formation is the way that rain droplets fall.  The rain droplets do not fall is flat sheet, however they tend to fall at various distances and speeds.  On some occasions you can see a full circle around a garden hose.
    • garza6544
      garza6544 on 03 Dec 14
       
      each rainbow is made by millions of rain droplets. the rain droplets make a reflect of light and it makes different colors. While light comes in a specific Droplet then it makes a specific color. Without milions and milions of rain droplets the rainbow cant be formed. If you only have a few rain droplets then you will only see a few colors. This is the reason why they happen after a rain storm.
  • function
    • garza6544
      garza6544 on 03 Dec 14
       
      Each rain droplet that rains  is always useful to make a rainbow because every rainbow needs to do something different to make a rainbow. The rain droplets separates the light into different colors.
marino5856

Why is the ocean salty and rivers are not? - 1 views

nature.ca/wos_e.cfm

shared by marino5856 on 03 Dec 14 - No Cached
    • marino5856
      marino5856 on 03 Dec 14
       
      Fresh wateris fromed becuase like the sea water evaporates in the atmosphere the water that it had is left behind. When it rains or snow it gives fresh water such as rivers, and lakes
garzat5774

How birds fly | Sciencelearn Hub - 0 views

sciencelearn.org.nz/...How-birds-fly

birds

shared by garzat5774 on 03 Dec 14 - No Cached
  • Birds have many physical features, besides wings, that work together to enable them to fly. They need lightweight, streamlined, rigid structures for flight. The four forces of flight – weight, lift, drag and thrust – affect the flight of birds.
  • Flying birds have: lightweight, smooth feathers – this reduces the forces of weight and drag a beak, instead of heavy, bony jaws and teeth – this reduces the force of weight an enlarged breastbone called a sternum for flight muscle attachment – this helps with the force of thrust light bones – a bird’s bones are basically hollow with air sacs and thin, tiny cross pieces to make bones stronger – this reduces the force of weight a rigid skeleton to provide firm attachments for powerful flight muscles – this helps with the force of thrust a streamlined body – this helps reduce the force of drag wings – these enable the force of lift.
  • WingsThe shape of a bird’s wing is important for producing lift. The increased speed over a curved, larger wing area creates a longer path of air. This means the air is moving more quickly over the top surface of the wing, reducing air pressure on the top of the wing and creating lift. Also, the angle of the wing (tilted) deflects air downwards, causing a reaction force in the opposite direction and creating lift.Larger wings produce greater lift than smaller wings. So smaller-winged birds (and planes) need to fly faster to maintain the same lift as those with larger wings.Wing loading tells you how fast a bird or plane must fly to be able to maintain lift: wing loading = weight/wing area (kilograms per square metre).A smaller wing loading number means the bird/plane can fly more slowly while still maintaining lift and is more manoeuvrable.
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  • GlidingWhen a bird is gliding, it doesn’t have to do any work. The wings are held out to the side of the body and do not flap. As the wings move through the air, they are held at a slight angle, which deflects the air downwards and causes a reaction in the opposite direction, which is lift. But there is also drag (air resistance) on the bird’s body, so every now and then, the bird has to tilt forward and go into a slight dive so that it can maintain forward speed.
  • SoaringSoaring flight is a special kind of glide in which the bird flies in a rising air current (called a thermal). Because the air is rising, the bird can maintain its height relative to the ground. The albatross uses this type of soaring to support its multi-year voyages at sea.
  • FlappingBirds’ wings flap with an up-and-down motion. This propels them forward. The entire wingspan has to be at the right angle of attack, which means the wings have to twist (and do so automatically) with each downward stroke to keep aligned with the direction of travel.
  • Birds obtain thrust by using their strong muscles and flapping their wings. Some birds may use gravity (for example, jumping from a tree) to give them forward thrust for flight. Others may use a running take-off from the ground.
  • Different birds have different adaptive features to meet their flight needs: Some birds are small and can manipulate their wings and tail to manoeuvre easily, such as the fantail (pīwakawaka). The hawk, with its large wingspan, is capable of speed and soaring. Gannets and seabirds are streamlined to dive at high speeds into the ocean for fish. Godwits, although small, are equipped to fly long distances.
    • garzat5774
      garzat5774 on 03 Dec 14
       
      birds have some chacteristics that help them fly, birds are light weighted they have light feathers insted of heavy ones that add more weight to their bodys, they also have a beak insted of jaws that also add weight to their boddys, thay have hollow bones in their body that means that the bone has nothing inside it
    • garzat5774
      garzat5774 on 03 Dec 14
       
      birds get ready to fly by flapping their wings, some birds use "gravity" to take of some run and they jump just like an airplane and others jump from a tree and then start flapping their winds
Regina Cantu

Why is the ocean salty? - 2 views

oceanservice.noaa.gov/...whysalty.html

Seawater salty

shared by Regina Cantu on 03 Dec 14 - No Cached
  • The rain that falls on the land contains some dissolved carbon dioxide from the surrounding air. This causes the rainwater to be slightly acidic due to carbonic acid (which forms from carbon dioxide and water).
  • As the rain erodes the rock, acids in the rainwater break down the rock.
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