Please, Please, Please help!!!!?
I had to do 50 questions in science and i have been stuck on 6 for an hour! Please, if anyone knows any of them, i will truly appreciate it! Each question has to be in paragraph form. This is related to science in mapping the Earth. I will give out 10 points for the best one!
1) Define latitude and longitude, and explain how these measurements in navigation.
2) What is remote sensing, and what are some ways mapping data can be gathered remotely?
3)What is a GPS, and how does it work?
4)Describe three methods used to measure the height of Mt. Everest.
5) What is sonar, and how is it used to map the ocean fllor?
6) How did ancient explorers find their way?
THANK YOU ALL!!! YOU ROCK!!!!!!
1) Latitude measures the mileage from the equator and logitude measures the mileage from the prime meridian in London. Sailors can tell how many miles away from London by the latitude and longitude markers all over the world.
2) Remote sensing is the use of radio controled devices to go out and measure mileage and place latitude and longitude markers.
3) GPS is the Global Placemarker System and works by remote sensing satellites that can compare where a GPS reciever is broadcasting from with the nearby latitude and longitude markers and send a signal back that tells you where you are.
4) Mount Everest has been measured with a tape measure in 1928 by Admiral Byrd, in 1952 by plumb bob from the Soviet satellite Jarvik IV, and in 2001 by remote sensing from America's Skylab.
5) Sonar is Sound Originating Naval Onbord Radar, and is used to bounce radar signals off the ocean floor so satellites can recieve the signals to make maps.
6) Ancient explorers used speculums to see further and released captured sea gulls to see which way they flew to the nearest land.
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April 25th, 2007 at 2:33 pm
1. Latitude is the lines that go left to right and longitude are the ones that go up and down. They help navigation because sailors and eaisily know where there going if they know the coordinates which latitude and longitude can help.
2. Idk
3. A gps is a device that you use to help you get to places you don't know so you don't get lost. I think you just put it in your car and set what area you are at.
4. not sure
5. A sonar is a type of supersonic wave that uses sound. When it is used the sound from the oceam floor bounces back to the surface and tells naviagators information.
6. They used a compass, and probably they look at which direction the wind is blowing from. Since they did'nt have much they have to use the nature itself. What I mean is they have to know which way the sun is to tell what direction they are at.
My anwers are not in detail, but I tried my best hope that helps.
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I learned the questions that I answered
April 25th, 2007 at 2:33 pm
3. GPS , Global Positioning System, is a system of determining your location on earth by use of satellite data. Basically the satellites know the exact time to a tiny fraction of a second and the location of the satellite at anytime. They broadcast both to the receiver. Since it takes time for the radio wave to reach the receiver, it defines a distance to the satellite. The satellite also knew its location, so the GPS receiver can calculate its location on Earth as somewhere on a curved plane. Three or more such calculations fix the location of the receiver as the intersection of the three planes.
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April 25th, 2007 at 2:35 pm
Question #6 should be first and they used the stars. They observed the position of the stars.
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April 25th, 2007 at 2:35 pm
Those are some really easy and basic questions. What grade level is this? You might be better off finding the answers in your text since these are such simple questions. You might learn some other things along the way. You probably could have found the answers in less time than it took to write out the questions for "Answers".
Rock on!
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April 25th, 2007 at 2:40 pm
I can help with some.
1. Latitude and longitude systems of measuring your position on the earth. They break up the world (a sphere) into equal segment of degrees from the equator north and south (latitude) or from the prime median in Greenwich, England moving east and west (longitude).
2. Remote sensing employs photography or other types of data collection on visible and invisble light emissions via satellites or airplanes to collect topographic, planametric, or other types of landscape data. it can be used to map vegetation, pollution, soils, or cities.
3. GPS is a global poisitioning system. It works via triangulation from satalites that are in orbit above the earth. It is what "on-star" and othertypes of navigational systems use to locate themselves and other features on the planet.
4. Direct measurement using an altimeter or surveying equipment, triangulation, and ?
5. Ancient explorers used the raising and setting position of the moon and the sun as well as the position of the stars in combination with a rudimentary compass made of a piece of "lodestone" (magnetite).
Hope this helps.
References :
April 25th, 2007 at 2:50 pm
http://www.mrdowling.com/601-grid.html
http://geography.about.com/library/weekly/aa031197.htm
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April 25th, 2007 at 3:02 pm
All I know is number 6. Ancient explorers found their way by using the stars, mainly the north star. When the earth spins on its axle, the view of the stars change, allowing the explorers to find their way, where ever they might be.
Wish I could be more help on the others.
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Learned it in class last semester, you can either trust me or wait for another answer.
April 25th, 2007 at 4:21 pm
1) Latitude measures the mileage from the equator and logitude measures the mileage from the prime meridian in London. Sailors can tell how many miles away from London by the latitude and longitude markers all over the world.
2) Remote sensing is the use of radio controled devices to go out and measure mileage and place latitude and longitude markers.
3) GPS is the Global Placemarker System and works by remote sensing satellites that can compare where a GPS reciever is broadcasting from with the nearby latitude and longitude markers and send a signal back that tells you where you are.
4) Mount Everest has been measured with a tape measure in 1928 by Admiral Byrd, in 1952 by plumb bob from the Soviet satellite Jarvik IV, and in 2001 by remote sensing from America's Skylab.
5) Sonar is Sound Originating Naval Onbord Radar, and is used to bounce radar signals off the ocean floor so satellites can recieve the signals to make maps.
6) Ancient explorers used speculums to see further and released captured sea gulls to see which way they flew to the nearest land.
References :
April 25th, 2007 at 4:30 pm
1. Latitude is disance markers measured from the equator and longitude markers are measured from England.
2. Using remote controled machines to place the markers for longitude and latitude instaed of doing it by hand
3. GPS = Global Placemarker System. It compares your position to the latitude and longitude markers.
4. Tape measure, plumb bob, and sonar from satellites.
5. Sonar = Sound Originating Naval Onboard Radar. That's where signals are sent from a boat or a submarine to a satellite to use the Global Placemarker System to marke new latitudes and longitudes
6. Telescopes, compasses, speculums, longitude and latitude markers, speculums, and birds.
References :
http://piv.pivpiv.dk/