SSLC (English Medium) Class 9 - Tamil Nadu Board of Secondary Education Question Bank Solutions for Social Science

This ______ gas helps in protecting the earth from radiation.

Who discovered Nitrogen in the Atmosphere? When?

Consider the following statement.

1. There are four major processes involved in the water cycle.
   
2. The groundwater gets collected below the earth’s surface
   
3. The Northern hemisphere holds 81% of land
   
4. The ocean floor is flat.

Mention the four spheres of the earth.

Mention the three major processes involved in the water cycle.

Mention the three major processes involved in the Hydrological cycle.

International boundaries are marked in ______ colour codes.

A synoptic chart means ______.

Mention the three types of map symbols.

What is meant by cybercartography?

Give Reason

“It is not possible to show all the data of an area on a map”.

Give Reason

Surveys help to prepare physical maps.

What are the colour codes used with map symbols?

Explain the types of maps.

Write a short note on Topographical Maps.

Write a short note on

Weather Maps

______ symbols are used to indicate railways, roads, power lines, telephone lines in mapping.

Assertion (A): A linear scale is represented by a straight line divided into equal parts to show
what these markings represents on the actual ground.
Reason (R): This scale helps in the direct measurement of distance on the map.

Assertion (A): Satellites do not collect large amounts of data of the entire area in a short span.

Reason (R): Sensors in the satellites record the reflected and emitted radiation.

Who is a Cartographer? What is Cartography?