Ninety percent of the world population occupies only ____ of land area.

• 10%

• 20%

• 30%

• 40%

• 50%

The most important natural resource

• Land

• Soil

• Water

• Forests

___________ is the process of collecting rain water from roof top .

Life supporting system

• Trading system

• Ecosystem

• Communication system

• Managing system

Large scale destruction of forest and cultivable land has happened due to__________.

Mass movement of rock,debris,or earthdown a slope is defined as___________.

• Landslide

• Soil

• Water

• Biosphere

________land is owned by community for common uses.

Living beings are inter-related and inter-dependent on each other for survival in the __________________.

• Ecosystem

• Lithosphere

• Hydrosphere

• Biosphere

• Thermosphere

The thin layer of grainy substance covering the surface of the earth is called_________

Other name of community land