 |
I. Key Words:
1. Latitude: Latitudes are imaginary circles that are drawn horizontal to the eqator from west to east.
2. Longitude: Longitude are imaginary semi circles that connects north pole and south pole.
3. International Date Line: 180° East and West longitude is known as international date line.
4. Axis: An imaginary line which is connecting north pole and south pole through the centre of the earth.
II. Improve Your Learning:
1. There is an outline map of the world on the next page. Identify and write the names of
continents and oceans. Colour the map using appropriate colours. Draw and write the names of the main latitudes.
A.
Continents in the world:
1. Asia
2. Africa
3. North America
4. South America
5. Europe
6. Antarctica and
7. Australia
Oceans in the world:
1. Pacific ocean.
2. Atlantic ocean.
3. Indian ocean.
4. Arctic ocean.
5. Antarctic ocean (Southern Ocean).
2. Ramesh says “Earth is flat”. What do you say?
A.
1. Some four hundred years ago most people believed that the Earth was flat and that if anyone kept travelling in any direction he would reach the edge of the Earth and from there he would fall off into the sky.
2. Actually the Earth is not like perfect sphere - not perfectly round . It is a little presse at the two poles in the north and south and bulges slightly in the middle around a line called equator.
3. Rosy is spinning a bangle like a top.What shape do you see?
A.
I saw it is in spheriod shape.
4. Collect information about explorers like Columbus.
A.
Vasco - Da- Gama , Magellan , Captain David Cook are some of explorers like Columbus
1. Marco Polo - Italian- Exploration of Asia and China.
2. Ferdenand Magellan - Portuguese- First voyage around the world.
3. Christopher Columbus - Italian / Spanish - Discovery of the new world.
4. Amerigo Vespucci - Italian / Spanish - America was named after him.
5. Vasco - Da- Gama - Portuguese -Discovery of Ocean Route from Portuguese to the East.
6. Captain James Cook - British explorer - Explored Australia.
5. Draw the latitudes and longitudes on the surface of a ball.
A.
6. “The Sun always rises in the east.” Find out the reasons for this.
A.
The Sun always rises in the east because, The Earth rotates on its axis from west to East.
7. Why do we draw imaginary lines on the globe/ map?
A.
The imaginary lines of latitudes and longitudes drawn by map makers help us to locate places on the globe and maps and to know the distance between the place
8. What is the effort put by scientists and sailors to know about earth?
A.
A.
1. They found and proved the shape of the earth.
2. They calculated the place of the earth in the solar system.
3. They estimated the birth and evolutions of the earth.
4. They drew the imaginary lines on the earth. Ex: axis, longitudes, latitudes, etc.
5. They make us to know many things about the earth like revolution, rotation, atmosphere, etc.
9. Observe the following pictures and fill the boxes with the names of the shaded
hemispheres.
A.
III. Additional and Short Answers:
1. What is called equator?
A.
An imaginary line drawn on the earth exactly with equal distance from the north pole and South pole
2. What is meant by 'Northern Hemisphere'?
A.
The area lies between the Equator and the North Pole is called Northern Hemisphere.
3. What is meant by 'Southern Hemisphere' ?
A.
The area lies between the Equator and the South Pole is called Southern Hemisphere.
4. Name the largest and smallest oceans ?
A.
The Pacific is the largest ocean and Arctic is the smallest ocean.
5. What is the differences between the latitudes and longitudes.
A.
Latitudes:
1.Latitudes are circles drawn parallel to equator at 1° interval.
2. They are also known as parallels.
3. There are 90 latitudes in each of the Northern and Southern hemisphere.
4. The 0 ° latitude is called the equator.
Longitudes:
1. Longitudes are the semicircles drawn passing through the poles intersecting the equator.
2. They are also known as meridians.
3. There are 180 longitudes each eastwards and westwards.
4. The 0 ° longitude is called the Greenwich meridian.
6. Can you see how people can stand on the earth if it is like a ball? Explain.
A.
We never fall off the Earth because the Earth acts like a very powerful magnet which pulls us towards it. We can only fall on the earth.
