GEOLOGY

Detailed explanation-1: -(1) Water filling up joints and pores-spaces is ground water. (2) Groundwater plays an important role in weathering and mass movement. (3) It re-enters hydrological cycle as springs. (4) Amount of water available as ground water depends upon climate, season and nature of rocks.

Detailed explanation-2: -Groundwater is a strong erosional force, as it works to dissolve away solid rock. Carbonic acid is especially good at dissolving the rock limestone. Rainwater absorbs carbon dioxide (CO2) as it falls. The CO2 combines with water to form carbonic acid.

Detailed explanation-3: -Erosional Landforms due to Groundwater Sinkholes and caves are erosional landforms formed due to the action of ground water.

Detailed explanation-4: -Liquid water is the major agent of erosion on Earth. Rain, rivers, floods, lakes, and the ocean carry away bits of soil and sand and slowly wash away the sediment.

Detailed explanation-5: -Groundwater is water that has found its way down from the Earth’s surface into the cracks and spaces in soil, sand and rock. It is a critical source of drinking water and a key resource for agriculture, industry and natural ecosystems. However, groundwater supplies are under threat from overuse and pollutants.