A person who deals with the suitable placement of agricultural land, industries, roads, houses etc is called a _________.

The _________ prevents the sun's harmful rays from reaching the earth's surface.

The envelope of air which surrounds the earth is called the _________.

The complex system of interactions between the organisms and their physical environment in a particular area is referred as __________.

The non- living components such as land, water and air which make up our environment is called _________ environment.

The Industrial Revolution in __________ enabled large-scale production of goods.

Earth Day is celebrated world wide on __________.

Without the __________ our earth would have been barren like the other planets.

A typical _________ ecosystem contains fish, frogs, algae, waterlilies and other species.

The rocky outermost layer of the earth is called ____________.