Success Tip                        Economy
 A landslide is the movement of rock, debris or earth        l Movement of people from a village to a small
 down a slope. They result from the failure of the             town and later to a city is known as step-wise
 materials which make up the hill slope and are driven         migration
 by the force of gravity. Landslides are known also as       l “Wall Street” is the name of the Stock Exchange
 landslips, slumps or slope failure                            of New York
   l Reh refers to the white salt which covers the           l Feature of Indifference Curve
      land in some areas during dry season                     ä        They do not intersect each other
   l Biodiversity is also known as Ecosystem diver-              ä      They slope downwards to the right
                                                                   ä    They are parallel to each other
                      Success Tip                            l       The difference in the value of visible exports and
 Biodiversity is the variability among living organisms              visible imports is called Balance of Trade
 from all sources, including terrestrial, marine, and                                Success Tip
 other aquatic ecosystems and the ecological
                                                          The balance of trade (BOT) is the difference between
 complexes of which they are part; this includes
                                                          a country’s imports and its exports for a given time
 diversity within species, between species, and of
                                                          period. The balance of trade is the largest component
                                                          of the country’s balance of payments
   l Rotation of crops is essential for increasing fer-
                                                             l When income increase, consumption also in-
      tility of the soil
                                                                     creases in a lower proportion
   l Addition of excessive amounts of heat to a lake
                                                             l From the national point of view study of sales
      is referred to as thermal pollution
                                                                     of TISCO indicates Micro Approach
   l One of the regions that receives rainfall from
      the North-Easterly monsoon is Tamil Nadu           Physics
   l Ecosystem consists of a biotic community and            l       The purpose of choke in a fluorescent lamp is to
      its non-living elements                                        decrease the current flow
General Geography                                            l       The mercury and sodium street lamps light up
                                                                     because of atomic emission
   l  Match the following:
                                                             l       A person can jump higher on the moon’s sur-
      I                           II
                                                                     face than on the earth because the accelera-
      Crops                       First in the world                 tion due to gravity in moon is smaller than
      Rice                        China                              that on the earth
      Maize                       USA                        l       The apparent weight of a man in a lift is less the
      Rubber                      Malaysia                           real weight when the lift is going down with
      Sugarcane                   Brazil                             an acceleration
   l  Switzerland has the longest overland tunnel                                    Success Tip
   l  The remedies to soil erosion are contour bund-      When we exert a force on the floor of the lift i.e. our
      ing and regulation of land use                      weight, according to Newton’s third law the floor of
                      Success Tip                         the lift exerts an equal and opposite force on us.
                                                          This reaction force is felt as the apparent weight
 Contour bunding is a proven sustainable land             and is called normal reaction force
 management practice for marginal, sloping, and hilly
                                                             l Rainbows are produced when sunlight Incident
 land where the soil productivity is very low
                                                                     on rain drops hanging in the atmosphere is
Polity and Constitution                                              dispersed after suffering refraction and in-
                                                                     ternal reflection
   l  In the case of deadlock between the two houses
      of the parliament, the joint sitting is presided   Chemistry
      over by the Speaker of Lok Sabha                       l       The soft silvery metallic element which ionizes
   l  The Indian Constitution provides the country                   easily when heated or exposed to light and is
      with three categories of civil services, namely                present in atomic clocks is Cesium
      administrative, police and foreign services                                    Success Tip
   l  According to Communism private property is          Caesium is a chemical element with symbol Cs and
      the chief enemy of the society                      atomic number 55. It is a soft, silvery-gold alkali
   l  Protection of Fundamental Rights comes un-          metal with a melting point of 28.5°C, which makes
      der the jurisdiction of both the High Court and     it one of only five elemental metals that are liquid
      the Supreme Court                                   at or near room tempe-rature