Class:9th Subject: Geography Chapter:2(Latitudes and longitudes) ICSE board book name(Goyal brothers prakashan) please provide me the answers of the questions given at the back of this chapter..Do it in the notebook click pics and please send it to me.
Answers
A. Define the Following.
1. In geography, latitude is a geographic coordinate that specifies the north–south position of a point on the Earth's surface. Latitude is an angle which ranges from 0° at the Equator to 90° at the poles. Lines of constant latitude, or parallels, run east–west as circles parallel to the equator.
2. Longitude is a geographic coordinate that specifies the east–west position of a point on the Earth's surface, or the surface of a celestial body. It is an angular measurement, usually expressed in degrees and denoted by the Greek letter lambda. Meridians connect points with the same longitude.
3. A meridian is defined as a large imaginary circle that passes through two poles, particularly on a globe, or the highest stage of development. An example of a meridian is the Prime Meridian. ... A great circle passing through the celestial poles, the observer's zenith and nadir, and the horizon's north and south points.
4. A prime meridian is the meridian in a geographic coordinate system at which longitude is defined to be 0°. Together, a prime meridian and its anti-meridian form a great circle. This great circle divides a spheroid into two hemispheres.
5. Local time implies the time of a particular country, as regards the meridian running through it. On the contrary, standard time is referred as the official local time of a region ascertained by the distance from the Prime Meridian of the meridian running through the area.
6. Standard time is the synchronization of clocks within a geographical region to a single time standard, rather than a local mean time standard. Generally, standard time agrees with the local mean time at some meridian that passes through the region, often near the center of the region.
7. Indian Standard time (IST) is the time zone observed throughout India, with a time offset of UTC+05:30. India does not observe daylight saving time or other seasonal adjustments. In military and aviation time IST is designated E* ("Echo-Star"). It is indicated as Asia/Kolkata in the IANA time zone database.
8. Greenwich Mean Time is the mean solar time at the Royal Observatory in Greenwich, London, counted from midnight. At different times in the past, it has been calculated in different ways, including being calculated from noon; as a consequence, it cannot be used to specify a particular time unless a context is given.
9. The date line, also called the International Date Line, is a boundary from which each calendar day starts. Areas to the west of the date line are one calendar day ahead of areas to the east. The date line runs from the North Pole to the South Pole through the Pacific Ocean.
10. A great circle, also known as an orthodrome, of a sphere is the intersection of the sphere and a plane that passes through the center point of the sphere. A great circle is the largest circle that can be drawn on any given sphere.
11. A circle of a sphere is a circle that lies on a sphere. Such a circle can be formed as the intersection of a sphere and a plane, or of two spheres. A circle on a sphere whose plane passes through the center of the sphere is called a great circle; otherwise it is a small circle.
12. The geographic grid uses latitude and longitude lines. Latitude lines are invisible lines that run east to west around Earth. The geographic grid is used to give a specific location, by giving the intersection of the latitude and longitude lines at that point.
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9 class ka hai chapter 2 latitude and longitude