Define the following a.impervious rocks b.Megalithic age c. Ground water
Answers
Answer:
Groundwater is one of our most valuable resources—even though you probably never see it or even realize it is there. As you may have read, most of the void spaces in the rocks below the water table are filled with water. These rocks have different porosity and permeability characteristics, which means that water does not move around the same way in all rocks below ground.A couple of important factors are responsible for the existence of groundwater:
GRAVITY
Nothing surprising here - gravity pulls water and everything else toward the center of the Earth. That means that water on the surface will try to seep into the ground below it.
THE ROCKS BELOW OUR FEET
The rock below the Earth's surface is the bedrock. If all bedrock consisted of a dense material like solid granite, then even gravity would have a hard time pulling water downward. But Earth's bedrock consists of many types of rock, such as sandstone, granite, and limestone. Bedrocks have varying amounts of void spaces in them where groundwater accumulates. Bedrock can also become broken and fractured, creating spaces that can fill with water. And some bedrock, such as limestone, are dissolved by water -- which results in large cavities that fill with water.
Answer:
impervious rock : impervious Rock which will not permit oil, water, or gas to flow through it.
megalithic age: In prehistoric art, a megalith is a large, often undressed stone, that has been used in the construction of various types of Neolithic, Chalcolithic or Bronze Age monuments, during the period 4500-1000 BCE.
Ground water: Groundwater is the water present beneath Earth's surface in soil pore spaces and in the fractures of rock formations.