Which one of the following is the indirect use of forests?

(1) Medicinal plants

(2) Checking soil erosion

(3) Building material

(4) Grazing

In order to prevent the expansion of deserts, trees are planted in strips or blocks with the shortest trees on the desert side and the tallest on the other side. Such plantation is called?

(1) shelterbelts

(2) agroforests

(3) windbreaks

(4) social forests

The food chain refers to the transfer of energy from :

(1) the interior of the earth to the surface

(2) lower to higher latitudes

(3) one organism to another

(4) organisms of the land to those of the sea by means of river

The presence of a lion in the forest is essential in order to

(1) keep the trees safe from felling

(2) add beauty in the forests

(3) save the pastures from being overgrazed

(4) keep other carnivorous animals away

Which one is not a non-conventional energy source

(1) Nuclear energy

(2) Solar Energy

(3) Wind energy

(4) Tidal power

The Montreal Protocol 1987 refers to

(1) saving the Bio-diversity of our planet

(2) signing of an accord on the peaceful uses of atomic energy

(3) signing of an accord on keeping Antarctica as a nuclear-free zone

(4) saving the ozone layer from destruction by reducing the use of CFCs

Trees are leafless for a shorter or longer season of the year in :

(1) Evergreen forest

(2) Mangrove forest

(3) Scrub jungle forest

(4) Deciduous forest

Snakes and vultures are eating rats in a field. If wild dogs are let into the field, what will be the immediate result?

(1) Decrease in the number of snakes

(2) Decrease in the number of vultures

(3) Decrease in the number of rats

(4) Increase in the number of snakes

Coastal Andhra Pradesh and Orissa often face natural disasters due to

(1) Cyclones

(2) Earthquakes

(3) Landslides

(4) Tornadoes

The main cause of global climatic change is

(1) increase in the content of carbon dioxide in the atmosphere

(2) emissions of industrial gases

(3) adding dust

(4) changes in plant cover

The sphere of living matter together with water, air, and soil on the surface of the earth is known as

(1) Lithosphere

(2) Biosphere

(3) Hydrosphere

(4) Atmosphere