1. What are Time Zones? How many Time Zones do
we have?
2. London experiences a lower temperature than
Singapore throughout the year. Why?
3. What is International Date Line? Describe the use
of this line.
4. Why do some countries have many Time Zones?
5. What are Small Circles?
6 Except for the Equator, other Parallels of Latitudes
are not Great Circles. Why?
7. How is the use of local time inconvenient in practical
life?
8. What is a Grid?
9. Who was the first mathematician to have measured
the circumference of the Earth?
10. Name the important Climatic Zones of the World.
11. State the rate of change of time with longitude.
12. Explain how latitudes and longitudes help to locate
position of a place on a globe.
Answers
Answer:
24 time zones
1)The time zone is a region of a globe that tells us standard time. Time zones tends to follow the boundaries of the countries. There are 24 time zones on earth if each time is having 1 hr difference
2)London experiences a lower temperature than Singapore throughout the year because of their location on the globe/ Singapore lies at the latitude of 1.1 degrees North and hence observes an equatorial climate.
3)is located halfway round the world from the prime meridian—the zero degrees longitude established in Greenwich, England, in 1852. The International Date Line functions as a “ line of demarcation ” separating two consecutive calendar dates. When you cross the date line, you become a time traveler of sorts!
4)Time zones are based on the fact that it takes one hour for the earth to rotate 15 degrees on its axis. ... That means that large countries that span more than 30 degrees of longitude usually have different time zones.
5)a circle on the surface of a sphere whose plane does not pass through the sphere's centre.
6)except for the equator other parallels of latitudes are not great circles this is happens because other parallels of latitudes (which are small circle) do not lie on the plane passing through the center of Earth /globe nor do they divide the earth/globe into two equal halves, which only equator can do .
7)There is a time difference between each longitude of 4 and if local time was used and there would be a total confusing as crossing 1° towards the east would cause a 4 minute difference in time and tish would cause total confusion and even technology wont be able to calculate it properly but with the use of standard
8)A grid is a network of intersecting parallel lines, whether real or imaginary. Most American streets are laid out in a grid pattern, meaning the streets intersect at right angles and form a pattern of squares when viewed from above.
9)Eratosthenes
10)Earth has three main climate zones—tropical, temperate, and polar. These zones can be further divided into smaller zones, each with its own typical climate. A region's climate, together with its physical characteristics, determines its plant and animal life. Polar climates are cold and dry, with long, dark winter
11)The rate of change of time per longitude is 4 minutes . As the degree of longitude increases time also increases.
12)Latitudes and longitudes are 'imaginary lines' on the globe. The latitudes run east and west whereas longitudes run north and south. Using the latitudes and longitudes, the angular distance of the place can be determined and the 'location of a place' in degrees can be obtained.